From dc037bc8dd4e651915dc25f4f141aebbe7b32766 Mon Sep 17 00:00:00 2001
From: Robert Pintilii <robert.pin9@gmail.com>
Date: Tue, 9 May 2023 12:10:46 +0300
Subject: [PATCH] ref(TS) Convert some native components to TS (#13307)

---
 package-lock.json                             |  19 +++
 package.json                                  |   1 +
 react/features/base/conference/reducer.ts     |   1 +
 react/features/base/config/configType.ts      |   2 +
 ...nnectionInfo.js => TestConnectionInfo.tsx} |  45 +++----
 .../base/testing/components/TestHint.web.ts   |   3 +
 .../AbstractInsecureRoomNameLabel.tsx         |   8 +-
 .../{AlwaysOnLabels.js => AlwaysOnLabels.tsx} |   8 +-
 .../native/{Conference.js => Conference.tsx}  | 110 +++++++++---------
 ...edLabelPopup.js => ExpandedLabelPopup.tsx} |  15 ++-
 ...el.js => InsecureRoomNameExpandedLabel.ts} |   8 +-
 ...NameLabel.js => InsecureRoomNameLabel.tsx} |   5 +-
 .../native/{Labels.js => Labels.tsx}          |  10 +-
 ...el.js => RaisedHandsCountExpandedLabel.ts} |   8 +-
 ...ountLabel.js => RaisedHandsCountLabel.tsx} |   9 +-
 .../native/{TitleBar.js => TitleBar.tsx}      |  44 ++++---
 .../components/native/carmode/CarMode.tsx     |   1 -
 .../native/carmode/SoundDeviceButton.tsx      |   2 -
 .../components/native/carmode/TitleBar.tsx    |   2 -
 .../native/{constants.js => constants.ts}     |  24 +++-
 .../filmstrip/components/native/Filmstrip.tsx |   2 +-
 react/features/filmstrip/functions.native.ts  |   2 +-
 ...leButton.js => AudioDeviceToggleButton.ts} |  11 +-
 ...erDialog.js => AudioRoutePickerDialog.tsx} |  83 ++++++-------
 .../components/{styles.js => styles.ts}       |   2 -
 .../audio-mode/{logger.js => logger.ts}       |   2 -
 .../{middleware.js => middleware.ts}          |  18 +--
 react/features/mobile/audio-mode/reducer.ts   |   7 +-
 .../background/{actions.js => actions.ts}     |   4 +-
 ...dleware.native.js => middleware.native.ts} |   9 +-
 .../mobile/background/middleware.web.js       |   0
 react/features/mobile/background/reducer.ts   |   4 +-
 .../{CallKit.js => CallKit.ts}                |   4 +-
 ...nectionService.js => ConnectionService.ts} |   2 +-
 .../{functions.js => functions.ts}            |   5 +-
 .../{middleware.js => middleware.ts}          |  39 ++++---
 .../external-api/{logger.js => logger.ts}     |   2 -
 .../{middleware.js => middleware.ts}          |  55 +++++----
 .../full-screen/{actions.js => actions.ts}    |   4 +-
 .../{middleware.js => middleware.ts}          |   9 +-
 ...tainer.js => LobbyNavigationContainer.tsx} |   5 +-
 .../welcome/{functions.js => functions.tsx}   |   6 +-
 .../{middleware.js => middleware.ts}          |   8 +-
 .../{middleware.js => middleware.ts}          |   4 +-
 .../{actions.js => actions.ts}                |   8 +-
 ...ureButton.js => PictureInPictureButton.ts} |  20 ++--
 .../{logger.js => logger.ts}                  |   2 -
 .../{middleware.js => middleware.ts}          |   2 +-
 .../{middleware.js => middleware.ts}          |   2 +-
 .../mobile/watchos/{actions.js => actions.ts} |   2 -
 .../mobile/watchos/{logger.js => logger.ts}   |   2 -
 .../watchos/{middleware.js => middleware.ts}  |  16 +--
 .../components/AbstractRecentList.tsx         |   1 -
 .../recent-list/components/styles.web.js      |   1 -
 .../recent-list/components/styles.web.ts      |   4 +
 ...utton.js => ScreenSharingAndroidButton.ts} |  20 ++--
 .../components/native/ScreenSharingButton.tsx |   7 +-
 ...osButton.js => ScreenSharingIosButton.tsx} |  29 ++---
 .../components/native/VisitorsCountLabel.tsx  |   4 +-
 59 files changed, 361 insertions(+), 371 deletions(-)
 rename react/features/base/testing/components/{TestConnectionInfo.js => TestConnectionInfo.tsx} (87%)
 rename react/features/conference/components/native/{AlwaysOnLabels.js => AlwaysOnLabels.tsx} (95%)
 rename react/features/conference/components/native/{Conference.js => Conference.tsx} (91%)
 rename react/features/conference/components/native/{ExpandedLabelPopup.js => ExpandedLabelPopup.tsx} (69%)
 rename react/features/conference/components/native/{InsecureRoomNameExpandedLabel.js => InsecureRoomNameExpandedLabel.ts} (79%)
 rename react/features/conference/components/native/{InsecureRoomNameLabel.js => InsecureRoomNameLabel.tsx} (84%)
 rename react/features/conference/components/native/{Labels.js => Labels.tsx} (89%)
 rename react/features/conference/components/native/{RaisedHandsCountExpandedLabel.js => RaisedHandsCountExpandedLabel.ts} (72%)
 rename react/features/conference/components/native/{RaisedHandsCountLabel.js => RaisedHandsCountLabel.tsx} (76%)
 rename react/features/conference/components/native/{TitleBar.js => TitleBar.tsx} (81%)
 rename react/features/conference/components/native/{constants.js => constants.ts} (78%)
 rename react/features/mobile/audio-mode/components/{AudioDeviceToggleButton.js => AudioDeviceToggleButton.ts} (80%)
 rename react/features/mobile/audio-mode/components/{AudioRoutePickerDialog.js => AudioRoutePickerDialog.tsx} (79%)
 rename react/features/mobile/audio-mode/components/{styles.js => styles.ts} (99%)
 rename react/features/mobile/audio-mode/{logger.js => logger.ts} (92%)
 rename react/features/mobile/audio-mode/{middleware.js => middleware.ts} (89%)
 rename react/features/mobile/background/{actions.js => actions.ts} (92%)
 rename react/features/mobile/background/{middleware.native.js => middleware.native.ts} (91%)
 delete mode 100644 react/features/mobile/background/middleware.web.js
 rename react/features/mobile/call-integration/{CallKit.js => CallKit.ts} (95%)
 rename react/features/mobile/call-integration/{ConnectionService.js => ConnectionService.ts} (95%)
 rename react/features/mobile/call-integration/{functions.js => functions.ts} (84%)
 rename react/features/mobile/call-integration/{middleware.js => middleware.ts} (92%)
 rename react/features/mobile/external-api/{logger.js => logger.ts} (92%)
 rename react/features/mobile/external-api/{middleware.js => middleware.ts} (93%)
 rename react/features/mobile/full-screen/{actions.js => actions.ts} (86%)
 rename react/features/mobile/full-screen/{middleware.js => middleware.ts} (95%)
 rename react/features/mobile/navigation/components/lobby/components/{LobbyNavigationContainer.js => LobbyNavigationContainer.tsx} (91%)
 rename react/features/mobile/navigation/components/welcome/{functions.js => functions.tsx} (74%)
 rename react/features/mobile/navigation/{middleware.js => middleware.ts} (82%)
 rename react/features/mobile/permissions/{middleware.js => middleware.ts} (96%)
 rename react/features/mobile/picture-in-picture/{actions.js => actions.ts} (87%)
 rename react/features/mobile/picture-in-picture/components/{PictureInPictureButton.js => PictureInPictureButton.ts} (88%)
 rename react/features/mobile/picture-in-picture/{logger.js => logger.ts} (91%)
 rename react/features/mobile/proximity/{middleware.js => middleware.ts} (96%)
 rename react/features/mobile/wake-lock/{middleware.js => middleware.ts} (95%)
 rename react/features/mobile/watchos/{actions.js => actions.ts} (99%)
 rename react/features/mobile/watchos/{logger.js => logger.ts} (91%)
 rename react/features/mobile/watchos/{middleware.js => middleware.ts} (93%)
 delete mode 100644 react/features/recent-list/components/styles.web.js
 create mode 100644 react/features/recent-list/components/styles.web.ts
 rename react/features/toolbox/components/native/{ScreenSharingAndroidButton.js => ScreenSharingAndroidButton.ts} (88%)
 rename react/features/toolbox/components/native/{ScreenSharingIosButton.js => ScreenSharingIosButton.tsx} (88%)

diff --git a/package-lock.json b/package-lock.json
index 8684d81d59..38e9320813 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -135,6 +135,7 @@
         "@types/react-dom": "17.0.14",
         "@types/react-linkify": "1.0.1",
         "@types/react-native": "0.68.9",
+        "@types/react-native-keep-awake": "2.0.3",
         "@types/react-native-video": "5.0.14",
         "@types/react-redux": "7.1.24",
         "@types/react-window": "1.8.5",
@@ -5826,6 +5827,15 @@
         "@types/react": "^17"
       }
     },
+    "node_modules/@types/react-native-keep-awake": {
+      "version": "2.0.3",
+      "resolved": "https://registry.npmjs.org/@types/react-native-keep-awake/-/react-native-keep-awake-2.0.3.tgz",
+      "integrity": "sha512-0C4bUlGPHRpplbn+YnX2UO0/2joa0dhCPumas2fielGNJkS1FTJOrw9jFo4B0+LOtmsepXiy/ANTF/on0b2Ddw==",
+      "dev": true,
+      "dependencies": {
+        "@types/react": "*"
+      }
+    },
     "node_modules/@types/react-native-video": {
       "version": "5.0.14",
       "resolved": "https://registry.npmjs.org/@types/react-native-video/-/react-native-video-5.0.14.tgz",
@@ -23883,6 +23893,15 @@
         "@types/react": "^17"
       }
     },
+    "@types/react-native-keep-awake": {
+      "version": "2.0.3",
+      "resolved": "https://registry.npmjs.org/@types/react-native-keep-awake/-/react-native-keep-awake-2.0.3.tgz",
+      "integrity": "sha512-0C4bUlGPHRpplbn+YnX2UO0/2joa0dhCPumas2fielGNJkS1FTJOrw9jFo4B0+LOtmsepXiy/ANTF/on0b2Ddw==",
+      "dev": true,
+      "requires": {
+        "@types/react": "*"
+      }
+    },
     "@types/react-native-video": {
       "version": "5.0.14",
       "resolved": "https://registry.npmjs.org/@types/react-native-video/-/react-native-video-5.0.14.tgz",
diff --git a/package.json b/package.json
index 1048462da8..7be1b23540 100644
--- a/package.json
+++ b/package.json
@@ -140,6 +140,7 @@
     "@types/react-dom": "17.0.14",
     "@types/react-linkify": "1.0.1",
     "@types/react-native": "0.68.9",
+    "@types/react-native-keep-awake": "2.0.3",
     "@types/react-native-video": "5.0.14",
     "@types/react-redux": "7.1.24",
     "@types/react-window": "1.8.5",
diff --git a/react/features/base/conference/reducer.ts b/react/features/base/conference/reducer.ts
index 6d4b568f80..feb8e21b37 100644
--- a/react/features/base/conference/reducer.ts
+++ b/react/features/base/conference/reducer.ts
@@ -46,6 +46,7 @@ export interface IJitsiConference {
     authenticateAndUpgradeRole: Function;
     avModerationApprove: Function;
     avModerationReject: Function;
+    callUUID?: string;
     createVideoSIPGWSession: Function;
     dial: Function;
     disableAVModeration: Function;
diff --git a/react/features/base/config/configType.ts b/react/features/base/config/configType.ts
index d1dc7133a7..096d989ef9 100644
--- a/react/features/base/config/configType.ts
+++ b/react/features/base/config/configType.ts
@@ -170,6 +170,7 @@ export interface IConfig {
     }>;
     callDisplayName?: string;
     callFlowsEnabled?: boolean;
+    callHandle?: string;
     callStatsConfigParams?: {
         additionalIDs?: {
             customerID?: string;
@@ -191,6 +192,7 @@ export interface IConfig {
     };
     callStatsID?: string;
     callStatsSecret?: string;
+    callUUID?: string;
     channelLastN?: number;
     chromeExtensionBanner?: {
         chromeExtensionsInfo?: Array<{ id: string; path: string; }>;
diff --git a/react/features/base/testing/components/TestConnectionInfo.js b/react/features/base/testing/components/TestConnectionInfo.tsx
similarity index 87%
rename from react/features/base/testing/components/TestConnectionInfo.js
rename to react/features/base/testing/components/TestConnectionInfo.tsx
index c2c5af990b..8d991fb94b 100644
--- a/react/features/base/testing/components/TestConnectionInfo.js
+++ b/react/features/base/testing/components/TestConnectionInfo.tsx
@@ -1,6 +1,7 @@
 import React, { Component, Fragment } from 'react';
 import { connect } from 'react-redux';
 
+import { IReduxState } from '../../../app/types';
 import statsEmitter from '../../../connection-indicator/statsEmitter';
 import { getLocalParticipant } from '../../participants/functions';
 import { isTestModeEnabled } from '../functions';
@@ -10,7 +11,7 @@ import TestHint from './TestHint';
 /**
  * Defines the TestConnectionInfo's properties.
  */
-type Props = {
+interface IProps {
 
     /**
      * The JitsiConference's connection state. It's the lib-jitsi-meet's event
@@ -20,30 +21,30 @@ type Props = {
      * 'conference.connectionInterrupted'
      * 'conference.connectionRestored'.
      */
-    _conferenceConnectionState: string,
+    _conferenceConnectionState: string;
 
     /**
      * This will be a boolean converted to a string. The value will be 'true'
      * once the conference is joined (the XMPP MUC room to be specific).
      */
-    _conferenceJoinedState: string,
+    _conferenceJoinedState: string;
 
     /**
      * The local participant's ID. Required to be able to observe the local RTP
      * stats.
      */
-    _localUserId: string,
+    _localUserId: string;
 
     /**
      * The local participant's role.
      */
-    _localUserRole: string,
+    _localUserRole: string;
 
     /**
      * Indicates whether or not the test mode is currently on. Otherwise the
      * TestConnectionInfo component will not render.
      */
-    _testMode: boolean
+    _testMode: boolean;
 }
 
 /**
@@ -64,15 +65,15 @@ type State = {
             /**
              * The local download RTP bitrate.
              */
-            download: number,
+            download: number;
 
             /**
              * The local upload RTP bitrate.
              */
-            upload: number
-        }
-    }
-}
+            upload: number;
+        };
+    };
+};
 
 /**
  * The component will expose some of the app state to the jitsi-meet-torture
@@ -81,8 +82,7 @@ type State = {
  * this information, but there's no such option on React Native(maybe that's
  * a good thing).
  */
-class TestConnectionInfo extends Component<Props, State> {
-    _onStatsUpdated: Object => void;
+class TestConnectionInfo extends Component<IProps, State> {
 
     /**
      * Initializes new <tt>TestConnectionInfo</tt> instance.
@@ -90,7 +90,7 @@ class TestConnectionInfo extends Component<Props, State> {
      * @param {Object} props - The read-only properties with which the new
      * instance is to be initialized.
      */
-    constructor(props: Props) {
+    constructor(props: IProps) {
         super(props);
 
         this._onStatsUpdated = this._onStatsUpdated.bind(this);
@@ -114,7 +114,8 @@ class TestConnectionInfo extends Component<Props, State> {
      * @returns {void}
      * @private
      */
-    _onStatsUpdated(stats = {}) {
+    _onStatsUpdated(stats = { bitrate: { download: undefined,
+        upload: undefined } }) {
         this.setState({
             stats: {
                 bitrate: {
@@ -143,7 +144,7 @@ class TestConnectionInfo extends Component<Props, State> {
      * @inheritdoc
      * returns {void}
      */
-    componentDidUpdate(prevProps: Props) {
+    componentDidUpdate(prevProps: IProps) {
         if (prevProps._localUserId !== this.props._localUserId) {
             statsEmitter.unsubscribeToClientStats(
                 prevProps._localUserId, this._onStatsUpdated);
@@ -175,7 +176,7 @@ class TestConnectionInfo extends Component<Props, State> {
         }
 
         return (
-            <Fragment accessible = { false } >
+            <Fragment>
                 <TestHint
                     id = 'org.jitsi.meet.conference.connectionState'
                     value = { this.props._conferenceConnectionState } />
@@ -184,7 +185,7 @@ class TestConnectionInfo extends Component<Props, State> {
                     value = { this.props._conferenceJoinedState } />
                 <TestHint
                     id = 'org.jitsi.meet.conference.grantModeratorAvailable'
-                    value = { true } />
+                    value = { 'true' } />
                 <TestHint
                     id = 'org.jitsi.meet.conference.localParticipantRole'
                     value = { this.props._localUserRole } />
@@ -202,9 +203,9 @@ class TestConnectionInfo extends Component<Props, State> {
  *
  * @param {Object} state - The Redux state.
  * @private
- * @returns {Props}
+ * @returns {IProps}
  */
-function _mapStateToProps(state) {
+function _mapStateToProps(state: IReduxState) {
     const conferenceJoined
         = Boolean(state['features/base/conference'].conference);
     const localParticipant = getLocalParticipant(state);
@@ -212,8 +213,8 @@ function _mapStateToProps(state) {
     return {
         _conferenceConnectionState: state['features/testing'].connectionState,
         _conferenceJoinedState: conferenceJoined.toString(),
-        _localUserId: localParticipant?.id,
-        _localUserRole: localParticipant?.role,
+        _localUserId: localParticipant?.id ?? '',
+        _localUserRole: localParticipant?.role ?? '',
         _testMode: isTestModeEnabled(state)
     };
 }
diff --git a/react/features/base/testing/components/TestHint.web.ts b/react/features/base/testing/components/TestHint.web.ts
index e69de29bb2..5dae9e61dc 100644
--- a/react/features/base/testing/components/TestHint.web.ts
+++ b/react/features/base/testing/components/TestHint.web.ts
@@ -0,0 +1,3 @@
+import { Component } from 'react';
+
+export default Component;
diff --git a/react/features/conference/components/AbstractInsecureRoomNameLabel.tsx b/react/features/conference/components/AbstractInsecureRoomNameLabel.tsx
index 220a64d559..f3538dea0f 100644
--- a/react/features/conference/components/AbstractInsecureRoomNameLabel.tsx
+++ b/react/features/conference/components/AbstractInsecureRoomNameLabel.tsx
@@ -1,19 +1,15 @@
 import React, { PureComponent } from 'react';
+import { WithTranslation } from 'react-i18next';
 
 import { IReduxState } from '../../app/types';
 import isInsecureRoomName from '../../base/util/isInsecureRoomName';
 
-interface IProps {
+interface IProps extends WithTranslation {
 
     /**
      * True of the label should be visible.
      */
     _visible: boolean;
-
-    /**
-     * Function to be used to translate i18n labels.
-     */
-    t: Function;
 }
 
 /**
diff --git a/react/features/conference/components/native/AlwaysOnLabels.js b/react/features/conference/components/native/AlwaysOnLabels.tsx
similarity index 95%
rename from react/features/conference/components/native/AlwaysOnLabels.js
rename to react/features/conference/components/native/AlwaysOnLabels.tsx
index 3b254ef716..c74da79d75 100644
--- a/react/features/conference/components/native/AlwaysOnLabels.js
+++ b/react/features/conference/components/native/AlwaysOnLabels.tsx
@@ -1,5 +1,3 @@
-// @flow
-
 import React, { useCallback } from 'react';
 import { TouchableOpacity } from 'react-native';
 import { useDispatch } from 'react-redux';
@@ -19,16 +17,16 @@ import {
     LabelHitSlop
 } from './constants';
 
-type Props = {
+interface IProps {
 
     /**
      * Creates a function to be invoked when the onPress of the touchables are
      * triggered.
      */
-    createOnPress: Function
+    createOnPress: Function;
 }
 
-const AlwaysOnLabels = ({ createOnPress }: Props) => {
+const AlwaysOnLabels = ({ createOnPress }: IProps) => {
     const dispatch = useDispatch();
     const openHighlightDialogCallback = useCallback(() => dispatch(openHighlightDialog()), [ dispatch ]);
 
diff --git a/react/features/conference/components/native/Conference.js b/react/features/conference/components/native/Conference.tsx
similarity index 91%
rename from react/features/conference/components/native/Conference.js
rename to react/features/conference/components/native/Conference.tsx
index 657db3dae9..7c3faea377 100644
--- a/react/features/conference/components/native/Conference.js
+++ b/react/features/conference/components/native/Conference.tsx
@@ -1,5 +1,3 @@
-// @flow
-
 import { useIsFocused } from '@react-navigation/native';
 import React, { useEffect } from 'react';
 import {
@@ -8,12 +6,14 @@ import {
     Platform,
     SafeAreaView,
     StatusBar,
-    View
+    View,
+    ViewStyle
 } from 'react-native';
-import { withSafeAreaInsets } from 'react-native-safe-area-context';
+import { EdgeInsets, withSafeAreaInsets } from 'react-native-safe-area-context';
 import { connect } from 'react-redux';
 
 import { appNavigate } from '../../../app/actions';
+import { IReduxState } from '../../../app/types';
 import { FULLSCREEN_ENABLED, PIP_ENABLED } from '../../../base/flags/constants';
 import { getFeatureFlag } from '../../../base/flags/functions';
 import { getParticipantCount } from '../../../base/participants/functions';
@@ -24,6 +24,7 @@ import {
     ASPECT_RATIO_NARROW,
     ASPECT_RATIO_WIDE
 } from '../../../base/responsive-ui/constants';
+import { StyleType } from '../../../base/styles/functions.any';
 import TestConnectionInfo from '../../../base/testing/components/TestConnectionInfo';
 import { isCalendarEnabled } from '../../../calendar-sync/functions.native';
 import DisplayNameLabel from '../../../display-name/components/native/DisplayNameLabel';
@@ -63,27 +64,27 @@ import styles from './styles';
 /**
  * The type of the React {@code Component} props of {@link Conference}.
  */
-type Props = AbstractProps & {
+interface IProps extends AbstractProps {
 
     /**
      * Application's aspect ratio.
      */
-    _aspectRatio: Symbol,
+    _aspectRatio: Symbol;
 
     /**
      * Whether the audio only is enabled or not.
      */
-    _audioOnlyEnabled: boolean,
+    _audioOnlyEnabled: boolean;
 
     /**
      * Branding styles for conference.
      */
-    _brandingStyles: Object,
+    _brandingStyles: StyleType;
 
     /**
      * Whether the calendar feature is enabled or not.
      */
-    _calendarEnabled: boolean,
+    _calendarEnabled: boolean;
 
     /**
      * The indicator which determines that we are still connecting to the
@@ -91,101 +92,101 @@ type Props = AbstractProps & {
      * joining the room. If truthy, then an activity/loading indicator will be
      * rendered.
      */
-    _connecting: boolean,
+    _connecting: boolean;
 
     /**
      * Set to {@code true} when the filmstrip is currently visible.
      */
-    _filmstripVisible: boolean,
+    _filmstripVisible: boolean;
 
     /**
      * The indicator which determines whether fullscreen (immersive) mode is enabled.
      */
-    _fullscreenEnabled: boolean,
+    _fullscreenEnabled: boolean;
 
     /**
      * The indicator which determines if the conference type is one to one.
      */
-    _isOneToOneConference: boolean,
+    _isOneToOneConference: boolean;
 
     /**
      * The indicator which determines if the participants pane is open.
      */
-    _isParticipantsPaneOpen: boolean,
+    _isParticipantsPaneOpen: boolean;
 
     /**
      * The ID of the participant currently on stage (if any).
      */
-    _largeVideoParticipantId: string,
+    _largeVideoParticipantId: string;
 
     /**
      * Local participant's display name.
      */
-    _localParticipantDisplayName: string,
+    _localParticipantDisplayName: string;
 
     /**
      * Whether Picture-in-Picture is enabled.
      */
-    _pictureInPictureEnabled: boolean,
+    _pictureInPictureEnabled: boolean;
 
     /**
      * The indicator which determines whether the UI is reduced (to accommodate
      * smaller display areas).
      */
-    _reducedUI: boolean,
-
-    /**
-     * The indicator which determines whether the Toolbox is visible.
-     */
-    _toolboxVisible: boolean,
+    _reducedUI: boolean;
 
     /**
      * Indicates if we should auto-knock.
      */
-    _shouldEnableAutoKnock: boolean,
+    _shouldEnableAutoKnock: boolean;
 
     /**
      * Indicates whether the lobby screen should be visible.
      */
-    _showLobby: boolean,
+    _showLobby: boolean;
 
     /**
      * Indicates whether the car mode is enabled.
      */
-    _startCarMode: boolean,
+    _startCarMode: boolean;
+
+    /**
+     * The indicator which determines whether the Toolbox is visible.
+     */
+    _toolboxVisible: boolean;
 
     /**
      * The redux {@code dispatch} function.
      */
-    dispatch: Function,
+    dispatch: Function;
 
     /**
     * Object containing the safe area insets.
     */
-    insets: Object,
+    insets: EdgeInsets;
 
     /**
      * Default prop for navigating between screen components(React Navigation).
      */
-    navigation: Object
-};
+    navigation: any;
+}
 
 type State = {
 
     /**
      * The label that is currently expanded.
      */
-    visibleExpandedLabel: ?string
-}
+    visibleExpandedLabel?: string;
+};
 
 /**
  * The conference page of the mobile (i.e. React Native) application.
  */
-class Conference extends AbstractConference<Props, State> {
+class Conference extends AbstractConference<IProps, State> {
     /**
      * Timeout ref.
      */
-    _expandedLabelTimeout: Object;
+    _expandedLabelTimeout: any;
 
     /**
      * Initializes a new Conference instance.
@@ -193,14 +194,14 @@ class Conference extends AbstractConference<Props, State> {
      * @param {Object} props - The read-only properties with which the new
      * instance is to be initialized.
      */
-    constructor(props) {
+    constructor(props: IProps) {
         super(props);
 
         this.state = {
             visibleExpandedLabel: undefined
         };
 
-        this._expandedLabelTimeout = React.createRef();
+        this._expandedLabelTimeout = React.createRef<number>();
 
         // Bind event handlers so they are only bound once per instance.
         this._onClick = this._onClick.bind(this);
@@ -235,7 +236,7 @@ class Conference extends AbstractConference<Props, State> {
      *
      * @inheritdoc
      */
-    componentDidUpdate(prevProps) {
+    componentDidUpdate(prevProps: IProps) {
         const {
             _shouldEnableAutoKnock,
             _showLobby,
@@ -267,7 +268,7 @@ class Conference extends AbstractConference<Props, State> {
         // Tear handling any hardware button presses for back navigation down.
         BackHandler.removeEventListener('hardwareBackPress', this._onHardwareBackPress);
 
-        clearTimeout(this._expandedLabelTimeout.current);
+        clearTimeout(this._expandedLabelTimeout.current ?? 0);
     }
 
     /**
@@ -301,8 +302,6 @@ class Conference extends AbstractConference<Props, State> {
         );
     }
 
-    _onClick: () => void;
-
     /**
      * Changes the value of the toolboxVisible state, thus allowing us to switch
      * between Toolbox and Filmstrip and change their visibility.
@@ -314,8 +313,6 @@ class Conference extends AbstractConference<Props, State> {
         this._setToolboxVisible(!this.props._toolboxVisible);
     }
 
-    _onHardwareBackPress: () => boolean;
-
     /**
      * Handles a hardware button press for back navigation. Enters Picture-in-Picture mode
      * (if supported) or leaves the associated {@code Conference} otherwise.
@@ -340,8 +337,6 @@ class Conference extends AbstractConference<Props, State> {
         return true;
     }
 
-    _createOnPress: (string) => void;
-
     /**
      * Creates a function to be invoked when the onPress of the touchables are
      * triggered.
@@ -350,7 +345,7 @@ class Conference extends AbstractConference<Props, State> {
      * triggered.
      * @returns {Function}
      */
-    _createOnPress(label) {
+    _createOnPress(label: string) {
         return () => {
             const { visibleExpandedLabel } = this.state;
 
@@ -434,7 +429,7 @@ class Conference extends AbstractConference<Props, State> {
 
                 <View
                     pointerEvents = 'box-none'
-                    style = { styles.toolboxAndFilmstripContainer }>
+                    style = { styles.toolboxAndFilmstripContainer as ViewStyle }>
 
                     <Captions onPress = { this._onClick } />
 
@@ -463,17 +458,17 @@ class Conference extends AbstractConference<Props, State> {
                 <SafeAreaView
                     pointerEvents = 'box-none'
                     style = {
-                        _toolboxVisible
+                        (_toolboxVisible
                             ? styles.titleBarSafeViewColor
-                            : styles.titleBarSafeViewTransparent }>
+                            : styles.titleBarSafeViewTransparent) as ViewStyle }>
                     <TitleBar _createOnPress = { this._createOnPress } />
                 </SafeAreaView>
                 <SafeAreaView
                     pointerEvents = 'box-none'
                     style = {
-                        _toolboxVisible
+                        (_toolboxVisible
                             ? [ styles.titleBarSafeViewTransparent, { top: this.props.insets.top + 50 } ]
-                            : styles.titleBarSafeViewTransparent
+                            : styles.titleBarSafeViewTransparent) as ViewStyle
                     }>
                     <View
                         pointerEvents = 'box-none'
@@ -482,7 +477,7 @@ class Conference extends AbstractConference<Props, State> {
                     </View>
                     <View
                         pointerEvents = 'box-none'
-                        style = { alwaysOnTitleBarStyles }>
+                        style = { alwaysOnTitleBarStyles as ViewStyle }>
                         {/* eslint-disable-next-line react/jsx-no-bind */}
                         <AlwaysOnLabels createOnPress = { this._createOnPress } />
                     </View>
@@ -532,7 +527,7 @@ class Conference extends AbstractConference<Props, State> {
      * @returns {React$Element}
      */
     _renderNotificationsContainer() {
-        const notificationsStyle = {};
+        const notificationsStyle: ViewStyle = {};
 
         // In the landscape mode (wide) there's problem with notifications being
         // shadowed by the filmstrip rendered on the right. This makes the "x"
@@ -559,8 +554,6 @@ class Conference extends AbstractConference<Props, State> {
         );
     }
 
-    _setToolboxVisible: (boolean) => void;
-
     /**
      * Dispatches an action changing the visibility of the {@link Toolbox}.
      *
@@ -569,7 +562,7 @@ class Conference extends AbstractConference<Props, State> {
      * {@code Toolbox} or {@code false} to hide it.
      * @returns {void}
      */
-    _setToolboxVisible(visible) {
+    _setToolboxVisible(visible: boolean) {
         this.props.dispatch(setToolboxVisible(visible));
     }
 }
@@ -578,10 +571,11 @@ class Conference extends AbstractConference<Props, State> {
  * Maps (parts of) the redux state to the associated {@code Conference}'s props.
  *
  * @param {Object} state - The redux state.
+ * @param {any} _ownProps - Component's own props.
  * @private
- * @returns {Props}
+ * @returns {IProps}
  */
-function _mapStateToProps(state) {
+function _mapStateToProps(state: IReduxState, _ownProps: any) {
     const { isOpen } = state['features/participants-pane'];
     const { aspectRatio, reducedUI } = state['features/base/responsive-ui'];
     const { backgroundColor } = state['features/dynamic-branding'];
@@ -627,7 +621,7 @@ export default withSafeAreaInsets(connect(_mapStateToProps)(props => {
         return () => setPictureInPictureEnabled(false);
     }, [ isFocused ]);
 
-    return (
+    return ( // @ts-ignore
         <Conference { ...props } />
     );
 }));
diff --git a/react/features/conference/components/native/ExpandedLabelPopup.js b/react/features/conference/components/native/ExpandedLabelPopup.tsx
similarity index 69%
rename from react/features/conference/components/native/ExpandedLabelPopup.js
rename to react/features/conference/components/native/ExpandedLabelPopup.tsx
index 3ec26bcf6f..750ada5a67 100644
--- a/react/features/conference/components/native/ExpandedLabelPopup.js
+++ b/react/features/conference/components/native/ExpandedLabelPopup.tsx
@@ -1,26 +1,25 @@
-// @flow
-
 import React from 'react';
 
 import BaseTheme from '../../../base/ui/components/BaseTheme';
 
 import { EXPANDED_LABELS } from './constants';
 
-type Props = {
+interface IProps {
 
     /**
      * The selected label to show details.
      */
-    visibleExpandedLabel: ?string
+    visibleExpandedLabel?: string;
 }
 
-const ExpandedLabelPopup = ({ visibleExpandedLabel }: Props) => {
+const ExpandedLabelPopup = ({ visibleExpandedLabel }: IProps) => {
     if (visibleExpandedLabel) {
-        const expandedLabel = EXPANDED_LABELS[visibleExpandedLabel];
+        const expandedLabel = EXPANDED_LABELS[visibleExpandedLabel as keyof typeof EXPANDED_LABELS];
 
         if (expandedLabel) {
-            const LabelComponent = expandedLabel.component || expandedLabel;
-            const { props, alwaysOn } = expandedLabel || {};
+            const LabelComponent = expandedLabel.component;
+
+            const { props, alwaysOn } = expandedLabel;
             const style = {
                 top: alwaysOn ? BaseTheme.spacing[6] : BaseTheme.spacing[1]
             };
diff --git a/react/features/conference/components/native/InsecureRoomNameExpandedLabel.js b/react/features/conference/components/native/InsecureRoomNameExpandedLabel.ts
similarity index 79%
rename from react/features/conference/components/native/InsecureRoomNameExpandedLabel.js
rename to react/features/conference/components/native/InsecureRoomNameExpandedLabel.ts
index fd7d6de877..092150c1a1 100644
--- a/react/features/conference/components/native/InsecureRoomNameExpandedLabel.js
+++ b/react/features/conference/components/native/InsecureRoomNameExpandedLabel.ts
@@ -1,13 +1,11 @@
-// @flow
+import { WithTranslation } from 'react-i18next';
 
 import { translate } from '../../../base/i18n/functions';
-import ExpandedLabel, { Props as AbstractProps } from '../../../base/label/components/native/ExpandedLabel';
+import ExpandedLabel, { IProps as AbstractProps } from '../../../base/label/components/native/ExpandedLabel';
 
 import { INSECURE_ROOM_NAME_LABEL_COLOR } from './styles';
 
-type Props = AbstractProps & {
-    t: Function
-}
+type Props = AbstractProps & WithTranslation;
 
 /**
  * A react {@code Component} that implements an expanded label as tooltip-like
diff --git a/react/features/conference/components/native/InsecureRoomNameLabel.js b/react/features/conference/components/native/InsecureRoomNameLabel.tsx
similarity index 84%
rename from react/features/conference/components/native/InsecureRoomNameLabel.js
rename to react/features/conference/components/native/InsecureRoomNameLabel.tsx
index 34412ec79b..771d417b43 100644
--- a/react/features/conference/components/native/InsecureRoomNameLabel.js
+++ b/react/features/conference/components/native/InsecureRoomNameLabel.tsx
@@ -1,8 +1,7 @@
-// @flow
-
 import React from 'react';
 import { connect } from 'react-redux';
 
+import { translate } from '../../../base/i18n/functions';
 import { IconWarning } from '../../../base/icons/svg';
 import Label from '../../../base/label/components/native/Label';
 import AbstractInsecureRoomNameLabel, { _mapStateToProps } from '../AbstractInsecureRoomNameLabel';
@@ -27,4 +26,4 @@ class InsecureRoomNameLabel extends AbstractInsecureRoomNameLabel {
     }
 }
 
-export default connect(_mapStateToProps)(InsecureRoomNameLabel);
+export default translate(connect(_mapStateToProps)(InsecureRoomNameLabel));
diff --git a/react/features/conference/components/native/Labels.js b/react/features/conference/components/native/Labels.tsx
similarity index 89%
rename from react/features/conference/components/native/Labels.js
rename to react/features/conference/components/native/Labels.tsx
index 0f6719b6bc..32fa8bc03c 100644
--- a/react/features/conference/components/native/Labels.js
+++ b/react/features/conference/components/native/Labels.tsx
@@ -1,5 +1,5 @@
 import React, { Component } from 'react';
-import { TouchableOpacity, View } from 'react-native';
+import { TouchableOpacity, View, ViewStyle } from 'react-native';
 
 import TranscribingLabel from '../../../transcribing/components/TranscribingLabel.native';
 import VideoQualityLabel from '../../../video-quality/components/VideoQualityLabel.native';
@@ -8,19 +8,19 @@ import InsecureRoomNameLabel from './InsecureRoomNameLabel';
 import { LABEL_ID_INSECURE_ROOM_NAME, LABEL_ID_QUALITY, LABEL_ID_TRANSCRIBING, LabelHitSlop } from './constants';
 import styles from './styles';
 
-type Props = {
+interface IProps {
 
     /**
      * Creates a function to be invoked when the onPress of the touchables are
      * triggered.
      */
-    createOnPress: Function
+    createOnPress: Function;
 }
 
 /**
  * A container that renders the conference indicators, if any.
  */
-class Labels extends Component<Props> {
+class Labels extends Component<IProps> {
 
     /**
      * Implements React {@code Component}'s render.
@@ -32,7 +32,7 @@ class Labels extends Component<Props> {
             <View pointerEvents = 'box-none'>
                 <View
                     pointerEvents = 'box-none'
-                    style = { styles.indicatorContainer }>
+                    style = { styles.indicatorContainer as ViewStyle }>
                     <TouchableOpacity
                         hitSlop = { LabelHitSlop }
                         onPress = {
diff --git a/react/features/conference/components/native/RaisedHandsCountExpandedLabel.js b/react/features/conference/components/native/RaisedHandsCountExpandedLabel.ts
similarity index 72%
rename from react/features/conference/components/native/RaisedHandsCountExpandedLabel.js
rename to react/features/conference/components/native/RaisedHandsCountExpandedLabel.ts
index f10658ce4f..427ea25c5c 100644
--- a/react/features/conference/components/native/RaisedHandsCountExpandedLabel.js
+++ b/react/features/conference/components/native/RaisedHandsCountExpandedLabel.ts
@@ -1,11 +1,9 @@
-// @flow
+import { WithTranslation } from 'react-i18next';
 
 import { translate } from '../../../base/i18n/functions';
-import ExpandedLabel, { Props as AbstractProps } from '../../../base/label/components/native/ExpandedLabel';
+import ExpandedLabel, { IProps as AbstractProps } from '../../../base/label/components/native/ExpandedLabel';
 
-type Props = AbstractProps & {
-    t: Function
-}
+type Props = AbstractProps & WithTranslation;
 
 /**
  * A react {@code Component} that implements an expanded label as tooltip-like
diff --git a/react/features/conference/components/native/RaisedHandsCountLabel.js b/react/features/conference/components/native/RaisedHandsCountLabel.tsx
similarity index 76%
rename from react/features/conference/components/native/RaisedHandsCountLabel.js
rename to react/features/conference/components/native/RaisedHandsCountLabel.tsx
index 6e9e476705..391c16ae3b 100644
--- a/react/features/conference/components/native/RaisedHandsCountLabel.js
+++ b/react/features/conference/components/native/RaisedHandsCountLabel.tsx
@@ -1,6 +1,7 @@
 import React from 'react';
 import { useSelector } from 'react-redux';
 
+import { IReduxState } from '../../../app/types';
 import { IconRaiseHand } from '../../../base/icons/svg';
 import Label from '../../../base/label/components/native/Label';
 import BaseTheme from '../../../base/ui/components/BaseTheme.native';
@@ -8,17 +9,17 @@ import BaseTheme from '../../../base/ui/components/BaseTheme.native';
 import styles from './styles';
 
 const RaisedHandsCountLabel = () => {
-    const raisedHandsCount = useSelector(state =>
+    const raisedHandsCount = useSelector((state: IReduxState) =>
         (state['features/base/participants'].raisedHandsQueue || []).length);
 
-    return raisedHandsCount > 0 && (
+    return raisedHandsCount > 0 ? (
         <Label
             icon = { IconRaiseHand }
             iconColor = { BaseTheme.palette.uiBackground }
             style = { styles.raisedHandsCountLabel }
-            text = { raisedHandsCount }
+            text = { `${raisedHandsCount}` }
             textStyle = { styles.raisedHandsCountLabelText } />
-    );
+    ) : null;
 };
 
 export default RaisedHandsCountLabel;
diff --git a/react/features/conference/components/native/TitleBar.js b/react/features/conference/components/native/TitleBar.tsx
similarity index 81%
rename from react/features/conference/components/native/TitleBar.js
rename to react/features/conference/components/native/TitleBar.tsx
index 720cc78c90..7ce303c230 100644
--- a/react/features/conference/components/native/TitleBar.js
+++ b/react/features/conference/components/native/TitleBar.tsx
@@ -1,9 +1,8 @@
-// @flow
-
 import React from 'react';
-import { Text, View } from 'react-native';
+import { Text, View, ViewStyle } from 'react-native';
 import { connect } from 'react-redux';
 
+import { IReduxState } from '../../../app/types';
 import { getConferenceName, getConferenceTimestamp } from '../../../base/conference/functions';
 import { CONFERENCE_TIMER_ENABLED, MEETING_NAME_ENABLED } from '../../../base/flags/constants';
 import { getFeatureFlag } from '../../../base/flags/functions';
@@ -17,44 +16,43 @@ import ConferenceTimer from '../ConferenceTimer';
 import Labels from './Labels';
 import styles from './styles';
 
+interface IProps {
 
-type Props = {
+    /**
+     * Whether displaying the current conference timer is enabled or not.
+     */
+    _conferenceTimerEnabled: boolean;
 
     /**
      * Creates a function to be invoked when the onPress of the touchables are
      * triggered.
      */
-    _createOnPress: Function,
-
-    /**
-     * Whether displaying the current conference timer is enabled or not.
-     */
-    _conferenceTimerEnabled: boolean,
+    _createOnPress: Function;
 
     /**
      * Name of the meeting we're currently in.
      */
-    _meetingName: string,
+    _meetingName: string;
 
     /**
      * Whether displaying the current meeting name is enabled or not.
      */
-    _meetingNameEnabled: boolean,
+    _meetingNameEnabled: boolean;
 
     /**
      * True if the navigation bar should be visible.
      */
-    _visible: boolean
-};
+    _visible: boolean;
+}
 
 /**
  * Implements a navigation bar component that is rendered on top of the
  * conference screen.
  *
- * @param {Props} props - The React props passed to this component.
+ * @param {IProps} props - The React props passed to this component.
  * @returns {JSX.Element}
  */
-const TitleBar = (props: Props) => {
+const TitleBar = (props: IProps) => {
     const { _visible } = props;
 
     if (!_visible) {
@@ -63,22 +61,22 @@ const TitleBar = (props: Props) => {
 
     return (
         <View
-            style = { styles.titleBarWrapper }>
-            <View style = { styles.pipButtonContainer }>
+            style = { styles.titleBarWrapper as ViewStyle }>
+            <View style = { styles.pipButtonContainer as ViewStyle }>
                 <PictureInPictureButton styles = { styles.pipButton } />
             </View>
             <View
                 pointerEvents = 'box-none'
-                style = { styles.roomNameWrapper }>
+                style = { styles.roomNameWrapper as ViewStyle }>
                 {
                     props._conferenceTimerEnabled
-                    && <View style = { styles.roomTimerView }>
+                    && <View style = { styles.roomTimerView as ViewStyle }>
                         <ConferenceTimer textStyle = { styles.roomTimer } />
                     </View>
                 }
                 {
                     props._meetingNameEnabled
-                    && <View style = { styles.roomNameView }>
+                    && <View style = { styles.roomNameView as ViewStyle }>
                         <Text
                             numberOfLines = { 1 }
                             style = { styles.roomName }>
@@ -106,9 +104,9 @@ const TitleBar = (props: Props) => {
  * Maps part of the Redux store to the props of this component.
  *
  * @param {Object} state - The Redux state.
- * @returns {Props}
+ * @returns {IProps}
  */
-function _mapStateToProps(state) {
+function _mapStateToProps(state: IReduxState) {
     const { hideConferenceTimer, hideConferenceSubject } = state['features/base/config'];
     const startTimestamp = getConferenceTimestamp(state);
 
diff --git a/react/features/conference/components/native/carmode/CarMode.tsx b/react/features/conference/components/native/carmode/CarMode.tsx
index 2a5a1b127d..7d55688354 100644
--- a/react/features/conference/components/native/carmode/CarMode.tsx
+++ b/react/features/conference/components/native/carmode/CarMode.tsx
@@ -1,4 +1,3 @@
-/* eslint-disable lines-around-comment */
 import React, { useEffect } from 'react';
 import { View, ViewStyle } from 'react-native';
 import Orientation from 'react-native-orientation-locker';
diff --git a/react/features/conference/components/native/carmode/SoundDeviceButton.tsx b/react/features/conference/components/native/carmode/SoundDeviceButton.tsx
index 11848484f0..59330455e4 100644
--- a/react/features/conference/components/native/carmode/SoundDeviceButton.tsx
+++ b/react/features/conference/components/native/carmode/SoundDeviceButton.tsx
@@ -4,8 +4,6 @@ import { useDispatch } from 'react-redux';
 import { openSheet } from '../../../../base/dialog/actions';
 import Button from '../../../../base/ui/components/native/Button';
 import { BUTTON_TYPES } from '../../../../base/ui/constants.native';
-// eslint-disable-next-line lines-around-comment
-// @ts-ignore
 import AudioRoutePickerDialog from '../../../../mobile/audio-mode/components/AudioRoutePickerDialog';
 
 import AudioIcon from './AudioIcon';
diff --git a/react/features/conference/components/native/carmode/TitleBar.tsx b/react/features/conference/components/native/carmode/TitleBar.tsx
index 0e344e1ec9..71e65bfbb9 100644
--- a/react/features/conference/components/native/carmode/TitleBar.tsx
+++ b/react/features/conference/components/native/carmode/TitleBar.tsx
@@ -10,8 +10,6 @@ import { JitsiRecordingConstants } from '../../../../base/lib-jitsi-meet';
 import { getLocalParticipant } from '../../../../base/participants/functions';
 import ConnectionIndicator from '../../../../connection-indicator/components/native/ConnectionIndicator';
 import RecordingLabel from '../../../../recording/components/native/RecordingLabel';
-// eslint-disable-next-line lines-around-comment
-// @ts-ignore
 import VideoQualityLabel from '../../../../video-quality/components/VideoQualityLabel.native';
 
 import styles from './styles';
diff --git a/react/features/conference/components/native/constants.js b/react/features/conference/components/native/constants.ts
similarity index 78%
rename from react/features/conference/components/native/constants.js
rename to react/features/conference/components/native/constants.ts
index eafd40064c..7bfa7ba468 100644
--- a/react/features/conference/components/native/constants.js
+++ b/react/features/conference/components/native/constants.ts
@@ -1,4 +1,4 @@
-// @flow
+import React from 'react';
 
 import { JitsiRecordingConstants } from '../../../base/lib-jitsi-meet';
 import RecordingExpandedLabel from '../../../recording/components/native/RecordingExpandedLabel';
@@ -28,12 +28,22 @@ export const LABEL_ID_INSECURE_ROOM_NAME = 'insecure-room-name';
 export const LABEL_ID_RAISED_HANDS_COUNT = 'raised-hands-count';
 export const LABEL_ID_VISITORS_COUNT = 'visitors-count';
 
+interface IExpandedLabel {
+    alwaysOn?: boolean;
+    component: React.ComponentType<any>;
+    props?: any;
+}
+
 /**
  * The {@code ExpandedLabel} components to be rendered for the individual
  * {@code Label}s.
  */
-export const EXPANDED_LABELS = {
-    [LABEL_ID_QUALITY]: VideoQualityExpandedLabel,
+export const EXPANDED_LABELS: {
+    [key: string]: IExpandedLabel;
+} = {
+    [LABEL_ID_QUALITY]: {
+        component: VideoQualityExpandedLabel
+    },
     [LABEL_ID_RECORDING]: {
         component: RecordingExpandedLabel,
         props: {
@@ -48,8 +58,12 @@ export const EXPANDED_LABELS = {
         },
         alwaysOn: true
     },
-    [LABEL_ID_TRANSCRIBING]: TranscribingExpandedLabel,
-    [LABEL_ID_INSECURE_ROOM_NAME]: InsecureRoomNameExpandedLabel,
+    [LABEL_ID_TRANSCRIBING]: {
+        component: TranscribingExpandedLabel
+    },
+    [LABEL_ID_INSECURE_ROOM_NAME]: {
+        component: InsecureRoomNameExpandedLabel
+    },
     [LABEL_ID_RAISED_HANDS_COUNT]: {
         component: RaisedHandsCountExpandedLabel,
         alwaysOn: true
diff --git a/react/features/filmstrip/components/native/Filmstrip.tsx b/react/features/filmstrip/components/native/Filmstrip.tsx
index 84bf55a047..5cc10c819c 100644
--- a/react/features/filmstrip/components/native/Filmstrip.tsx
+++ b/react/features/filmstrip/components/native/Filmstrip.tsx
@@ -69,7 +69,7 @@ interface IProps {
     /**
      * Object containing the safe area insets.
      */
-    insets: Object;
+    insets?: Object;
 }
 
 /**
diff --git a/react/features/filmstrip/functions.native.ts b/react/features/filmstrip/functions.native.ts
index 8c26653552..9d4ac20302 100644
--- a/react/features/filmstrip/functions.native.ts
+++ b/react/features/filmstrip/functions.native.ts
@@ -219,7 +219,7 @@ export function getFilmstripDimensions({
     aspectRatio: Symbol;
     clientHeight: number;
     clientWidth: number;
-    insets: {
+    insets?: {
         bottom?: number;
         left?: number;
         right?: number;
diff --git a/react/features/mobile/audio-mode/components/AudioDeviceToggleButton.js b/react/features/mobile/audio-mode/components/AudioDeviceToggleButton.ts
similarity index 80%
rename from react/features/mobile/audio-mode/components/AudioDeviceToggleButton.js
rename to react/features/mobile/audio-mode/components/AudioDeviceToggleButton.ts
index 3f7e06d5f8..475ec4cafb 100644
--- a/react/features/mobile/audio-mode/components/AudioDeviceToggleButton.js
+++ b/react/features/mobile/audio-mode/components/AudioDeviceToggleButton.ts
@@ -1,5 +1,4 @@
 import { connect } from 'react-redux';
-import type { Dispatch } from 'redux';
 
 import { openSheet } from '../../../base/dialog/actions';
 import { translate } from '../../../base/i18n/functions';
@@ -8,18 +7,10 @@ import AbstractButton, { IProps as AbstractButtonProps } from '../../../base/too
 
 import AudioRoutePickerDialog from './AudioRoutePickerDialog';
 
-type Props = AbstractButtonProps & {
-
-    /**
-     * The Redux dispatch function.
-     */
-    dispatch: Dispatch<any>
-};
-
 /**
  * Implements an {@link AbstractButton} to open the audio device list.
  */
-class AudioDeviceToggleButton extends AbstractButton<Props, *> {
+class AudioDeviceToggleButton extends AbstractButton<AbstractButtonProps> {
     accessibilityLabel = 'toolbar.accessibilityLabel.audioRoute';
     icon = IconVolumeUp;
     label = 'toolbar.accessibilityLabel.audioRoute';
diff --git a/react/features/mobile/audio-mode/components/AudioRoutePickerDialog.js b/react/features/mobile/audio-mode/components/AudioRoutePickerDialog.tsx
similarity index 79%
rename from react/features/mobile/audio-mode/components/AudioRoutePickerDialog.js
rename to react/features/mobile/audio-mode/components/AudioRoutePickerDialog.tsx
index 9cce6044d0..c9a1e731a0 100644
--- a/react/features/mobile/audio-mode/components/AudioRoutePickerDialog.js
+++ b/react/features/mobile/audio-mode/components/AudioRoutePickerDialog.tsx
@@ -1,8 +1,9 @@
 import _ from 'lodash';
 import React, { Component } from 'react';
-import { NativeModules, Text, TouchableHighlight, View } from 'react-native';
+import { NativeModules, Text, TextStyle, TouchableHighlight, View, ViewStyle } from 'react-native';
 import { connect } from 'react-redux';
 
+import { IReduxState } from '../../../app/types';
 import { hideSheet } from '../../../base/dialog/actions';
 import BottomSheet from '../../../base/dialog/components/native/BottomSheet';
 import { bottomSheetStyles } from '../../../base/dialog/components/native/styles';
@@ -15,6 +16,7 @@ import {
     IconPhoneRinging,
     IconVolumeUp
 } from '../../../base/icons/svg';
+import { StyleType } from '../../../base/styles/functions.any';
 import BaseTheme from '../../../base/ui/components/BaseTheme.native';
 
 import styles from './styles';
@@ -24,92 +26,92 @@ const { AudioMode } = NativeModules;
 /**
  * Type definition for a single entry in the device list.
  */
-type Device = {
+interface IDevice {
 
     /**
      * Name of the icon which will be rendered on the right.
      */
-    icon: Object,
+    icon: Function;
 
     /**
      * True if the element is selected (will be highlighted in blue),
      * false otherwise.
      */
-    selected: boolean,
+    selected: boolean;
 
     /**
      * Text which will be rendered in the row.
      */
-    text: string,
+    text: string;
 
     /**
      * Device type.
      */
-    type: string,
+    type: string;
 
     /**
      * Unique device ID.
      */
-    uid: ?string
-};
+    uid?: string;
+}
 
 /**
  * "Raw" device, as returned by native.
  */
-type RawDevice = {
+export interface IRawDevice {
 
     /**
      * Display name for the device.
      */
-    name: ?string,
+    name?: string;
 
     /**
      * Is this device selected?
      */
-    selected: boolean,
+    selected: boolean;
 
     /**
      * Device type.
      */
-    type: string,
+    type: string;
 
     /**
      * Unique device ID.
      */
-    uid: ?string
-};
+    uid?: string;
+}
 
 /**
  * {@code AudioRoutePickerDialog}'s React {@code Component} prop types.
  */
-type Props = {
+interface IProps {
 
     /**
      * Object describing available devices.
      */
-    _devices: Array<RawDevice>,
+    _devices: Array<IRawDevice>;
 
     /**
      * Used for hiding the dialog when the selection was completed.
      */
-    dispatch: Function,
+    dispatch: Function;
 
     /**
      * Invoked to obtain translated strings.
      */
-    t: Function
-};
+    t: Function;
+}
 
 /**
  * {@code AudioRoutePickerDialog}'s React {@code Component} state types.
  */
-type State = {
+interface IState {
 
     /**
      * Array of available devices.
      */
-    devices: Array<Device>
-};
+    devices: Array<IDevice>;
+}
 
 /**
  * Maps each device type to a display name and icon.
@@ -146,7 +148,7 @@ const deviceInfoMap = {
  * Implements a React {@code Component} which prompts the user when a password
  * is required to join a conference.
  */
-class AudioRoutePickerDialog extends Component<Props, State> {
+class AudioRoutePickerDialog extends Component<IProps, IState> {
     state = {
         /**
          * Available audio devices, it will be set in
@@ -160,7 +162,7 @@ class AudioRoutePickerDialog extends Component<Props, State> {
      *
      * @inheritdoc
      */
-    static getDerivedStateFromProps(props: Props) {
+    static getDerivedStateFromProps(props: IProps) {
         const { _devices: devices, t } = props;
 
         if (!devices) {
@@ -170,7 +172,7 @@ class AudioRoutePickerDialog extends Component<Props, State> {
         const audioDevices = [];
 
         for (const device of devices) {
-            const infoMap = deviceInfoMap[device.type];
+            const infoMap = deviceInfoMap[device.type as keyof typeof deviceInfoMap];
 
             // Skip devices with unknown type.
             if (!infoMap) {
@@ -206,25 +208,25 @@ class AudioRoutePickerDialog extends Component<Props, State> {
     /**
      * Initializes a new {@code PasswordRequiredPrompt} instance.
      *
-     * @param {Props} props - The read-only React {@code Component} props with
+     * @param {IProps} props - The read-only React {@code Component} props with
      * which the new instance is to be initialized.
      */
-    constructor(props: Props) {
+    constructor(props: IProps) {
         super(props);
 
         // Trigger an initial update.
-        AudioMode.updateDeviceList && AudioMode.updateDeviceList();
+        AudioMode.updateDeviceList?.();
     }
 
     /**
      * Builds and returns a function which handles the selection of a device
      * on the sheet. The selected device will be used by {@code AudioMode}.
      *
-     * @param {Device} device - Object representing the selected device.
+     * @param {IDevice} device - Object representing the selected device.
      * @private
      * @returns {Function}
      */
-    _onSelectDeviceFn(device: Device) {
+    _onSelectDeviceFn(device: IDevice) {
         return () => {
             this.props.dispatch(hideSheet());
             AudioMode.setAudioDevice(device.uid || device.type);
@@ -234,11 +236,11 @@ class AudioRoutePickerDialog extends Component<Props, State> {
     /**
      * Renders a single device.
      *
-     * @param {Device} device - Object representing a single device.
+     * @param {IDevice} device - Object representing a single device.
      * @private
      * @returns {ReactElement}
      */
-    _renderDevice(device: Device) {
+    _renderDevice(device: IDevice) {
         const { icon, selected, text } = device;
         const selectedStyle = selected ? styles.selectedText : {};
         const borderRadiusHighlightStyles = {
@@ -253,11 +255,14 @@ class AudioRoutePickerDialog extends Component<Props, State> {
                 onPress = { this._onSelectDeviceFn(device) }
                 style = { speakerDeviceIsNotSelected && borderRadiusHighlightStyles }
                 underlayColor = { BaseTheme.palette.ui04 } >
-                <View style = { styles.deviceRow } >
+                <View style = { styles.deviceRow as ViewStyle } >
                     <Icon
                         src = { icon }
-                        style = { [ styles.deviceIcon, bottomSheetStyles.buttons.iconStyle, selectedStyle ] } />
-                    <Text style = { [ styles.deviceText, bottomSheetStyles.buttons.labelStyle, selectedStyle ] } >
+                        style = { [ styles.deviceIcon, bottomSheetStyles.buttons.iconStyle, selectedStyle
+                        ] as StyleType[] } />
+                    <Text
+                        style = { [ styles.deviceText, bottomSheetStyles.buttons.labelStyle, selectedStyle
+                        ] as TextStyle[] } >
                         { text }
                     </Text>
                 </View>
@@ -275,11 +280,11 @@ class AudioRoutePickerDialog extends Component<Props, State> {
         const { t } = this.props;
 
         return (
-            <View style = { styles.deviceRow } >
+            <View style = { styles.deviceRow as ViewStyle } >
                 <Icon
                     src = { deviceInfoMap.SPEAKER.icon }
-                    style = { [ styles.deviceIcon, bottomSheetStyles.buttons.iconStyle ] } />
-                <Text style = { [ styles.deviceText, bottomSheetStyles.buttons.labelStyle ] } >
+                    style = { [ styles.deviceIcon, bottomSheetStyles.buttons.iconStyle ] as StyleType[] } />
+                <Text style = { [ styles.deviceText, bottomSheetStyles.buttons.labelStyle ] as TextStyle[] } >
                     { t('audioDevices.none') }
                 </Text>
             </View>
@@ -316,7 +321,7 @@ class AudioRoutePickerDialog extends Component<Props, State> {
  * @param {Object} state - The Redux state.
  * @returns {Object}
  */
-function _mapStateToProps(state) {
+function _mapStateToProps(state: IReduxState) {
     return {
         _devices: state['features/mobile/audio-mode'].devices
     };
diff --git a/react/features/mobile/audio-mode/components/styles.js b/react/features/mobile/audio-mode/components/styles.ts
similarity index 99%
rename from react/features/mobile/audio-mode/components/styles.js
rename to react/features/mobile/audio-mode/components/styles.ts
index 304e263004..2613210e6c 100644
--- a/react/features/mobile/audio-mode/components/styles.js
+++ b/react/features/mobile/audio-mode/components/styles.ts
@@ -1,5 +1,3 @@
-// @flow
-
 import { MD_ITEM_HEIGHT } from '../../../base/dialog/components/native/styles';
 import { createStyleSheet } from '../../../base/styles/functions.any';
 import BaseTheme from '../../../base/ui/components/BaseTheme.native';
diff --git a/react/features/mobile/audio-mode/logger.js b/react/features/mobile/audio-mode/logger.ts
similarity index 92%
rename from react/features/mobile/audio-mode/logger.js
rename to react/features/mobile/audio-mode/logger.ts
index a2b68d0d11..9daf48fe4d 100644
--- a/react/features/mobile/audio-mode/logger.js
+++ b/react/features/mobile/audio-mode/logger.ts
@@ -1,5 +1,3 @@
-// @flow
-
 import { getLogger } from '../../base/logging/functions';
 
 export default getLogger('features/mobile/audio-mode');
diff --git a/react/features/mobile/audio-mode/middleware.js b/react/features/mobile/audio-mode/middleware.ts
similarity index 89%
rename from react/features/mobile/audio-mode/middleware.js
rename to react/features/mobile/audio-mode/middleware.ts
index ab0dd772f1..0be196e09f 100644
--- a/react/features/mobile/audio-mode/middleware.js
+++ b/react/features/mobile/audio-mode/middleware.ts
@@ -1,6 +1,7 @@
-// @flow
 import { NativeEventEmitter, NativeModules } from 'react-native';
+import { AnyAction } from 'redux';
 
+import { IStore } from '../../app/types';
 import { APP_WILL_MOUNT, APP_WILL_UNMOUNT } from '../../base/app/actionTypes';
 import { SET_AUDIO_ONLY } from '../../base/audio-only/actionTypes';
 import {
@@ -75,7 +76,7 @@ MiddlewareRegistry.register(store => next => action => {
  * @private
  * @returns {void}
  */
-function _appWillMount(store) {
+function _appWillMount(store: IStore) {
     const subscriptions = [
         AudioModeEmitter.addListener(AudioMode.DEVICE_CHANGE_EVENT, _onDevicesUpdate, store)
     ];
@@ -93,8 +94,9 @@ function _appWillMount(store) {
  * @private
  * @returns {void}
  */
-function _onDevicesUpdate(devices) {
-    const { dispatch } = this; // eslint-disable-line no-invalid-this
+function _onDevicesUpdate(devices: any) {
+    // @ts-ignore
+    const { dispatch } = this; // eslint-disable-line @typescript-eslint/no-invalid-this
 
     dispatch({
         type: _SET_AUDIOMODE_DEVICES,
@@ -112,7 +114,7 @@ function _onDevicesUpdate(devices) {
  * @private
  * @returns {void}
  */
-function _setSubscriptions({ getState }) {
+function _setSubscriptions({ getState }: IStore) {
     const { subscriptions } = getState()['features/mobile/audio-mode'];
 
     if (subscriptions) {
@@ -134,12 +136,12 @@ function _setSubscriptions({ getState }) {
  * @private
  * @returns {*} The value returned by {@code next(action)}.
  */
-function _updateAudioMode({ getState }, next, action) {
+function _updateAudioMode({ getState }: IStore, next: Function, action: AnyAction) {
     const result = next(action);
     const state = getState();
     const conference = getCurrentConference(state);
     const { enabled: audioOnly } = state['features/base/audio-only'];
-    let mode;
+    let mode: string;
 
     if (getFeatureFlag(state, AUDIO_FOCUS_DISABLED, false)) {
         return result;
@@ -149,7 +151,7 @@ function _updateAudioMode({ getState }, next, action) {
         mode = AudioMode.DEFAULT;
     }
 
-    AudioMode.setMode(mode).catch(err => logger.error(`Failed to set audio mode ${String(mode)}: ${err}`));
+    AudioMode.setMode(mode).catch((err: any) => logger.error(`Failed to set audio mode ${String(mode)}: ${err}`));
 
     return result;
 }
diff --git a/react/features/mobile/audio-mode/reducer.ts b/react/features/mobile/audio-mode/reducer.ts
index 36998bfb0a..929b922b22 100644
--- a/react/features/mobile/audio-mode/reducer.ts
+++ b/react/features/mobile/audio-mode/reducer.ts
@@ -2,10 +2,13 @@ import ReducerRegistry from '../../base/redux/ReducerRegistry';
 import { equals, set } from '../../base/redux/functions';
 
 import { _SET_AUDIOMODE_DEVICES, _SET_AUDIOMODE_SUBSCRIPTIONS } from './actionTypes';
+import { IRawDevice } from './components/AudioRoutePickerDialog';
 
 export interface IMobileAudioModeState {
-    devices: Object[];
-    subscriptions: Object[];
+    devices: IRawDevice[];
+    subscriptions: {
+        remove: Function;
+    }[];
 }
 
 const DEFAULT_STATE = {
diff --git a/react/features/mobile/background/actions.js b/react/features/mobile/background/actions.ts
similarity index 92%
rename from react/features/mobile/background/actions.js
rename to react/features/mobile/background/actions.ts
index 821a32acb7..cfb65f9fbc 100644
--- a/react/features/mobile/background/actions.js
+++ b/react/features/mobile/background/actions.ts
@@ -1,5 +1,3 @@
-// @flow
-
 import { APP_STATE_CHANGED, _SET_APP_STATE_LISTENER } from './actionTypes';
 
 /**
@@ -12,7 +10,7 @@ import { APP_STATE_CHANGED, _SET_APP_STATE_LISTENER } from './actionTypes';
  *     listener: Function
  * }}
  */
-export function _setAppStateListener(listener: ?Function) {
+export function _setAppStateListener(listener?: Function) {
     return {
         type: _SET_APP_STATE_LISTENER,
         listener
diff --git a/react/features/mobile/background/middleware.native.js b/react/features/mobile/background/middleware.native.ts
similarity index 91%
rename from react/features/mobile/background/middleware.native.js
rename to react/features/mobile/background/middleware.native.ts
index 70ef801325..081c43dc59 100644
--- a/react/features/mobile/background/middleware.native.js
+++ b/react/features/mobile/background/middleware.native.ts
@@ -1,8 +1,7 @@
-// @flow
-
 import { AppState } from 'react-native';
-import type { Dispatch } from 'redux';
+import { AnyAction } from 'redux';
 
+import { IStore } from '../../app/types';
 import { APP_WILL_MOUNT, APP_WILL_UNMOUNT } from '../../base/app/actionTypes';
 import MiddlewareRegistry from '../../base/redux/MiddlewareRegistry';
 
@@ -51,7 +50,7 @@ MiddlewareRegistry.register(store => next => action => {
  * @private
  * @returns {void}
  */
-function _onAppStateChange(dispatch: Dispatch<any>, appState: string) {
+function _onAppStateChange(dispatch: IStore['dispatch'], appState: string) {
     dispatch(appStateChanged(appState));
 }
 
@@ -69,7 +68,7 @@ function _onAppStateChange(dispatch: Dispatch<any>, appState: string) {
  * @private
  * @returns {Object} The value returned by {@code next(action)}.
  */
-function _setAppStateListenerF({ getState }, next, action) {
+function _setAppStateListenerF({ getState }: IStore, next: Function, action: AnyAction) {
     // Remove the old AppState listener and add the new one.
     const { appStateListener: oldListener } = getState()['features/background'];
     const result = next(action);
diff --git a/react/features/mobile/background/middleware.web.js b/react/features/mobile/background/middleware.web.js
deleted file mode 100644
index e69de29bb2..0000000000
diff --git a/react/features/mobile/background/reducer.ts b/react/features/mobile/background/reducer.ts
index 572fdddf9a..142bb75aa0 100644
--- a/react/features/mobile/background/reducer.ts
+++ b/react/features/mobile/background/reducer.ts
@@ -1,3 +1,5 @@
+import { AppStateStatus } from 'react-native';
+
 import ReducerRegistry from '../../base/redux/ReducerRegistry';
 
 import {
@@ -7,7 +9,7 @@ import {
 
 export interface IBackgroundState {
     appState: string;
-    appStateListener?: Function;
+    appStateListener?: (state: AppStateStatus) => void;
 }
 
 /**
diff --git a/react/features/mobile/call-integration/CallKit.js b/react/features/mobile/call-integration/CallKit.ts
similarity index 95%
rename from react/features/mobile/call-integration/CallKit.js
rename to react/features/mobile/call-integration/CallKit.ts
index 3fd304bd7c..d5015c2f0e 100644
--- a/react/features/mobile/call-integration/CallKit.js
+++ b/react/features/mobile/call-integration/CallKit.ts
@@ -1,6 +1,6 @@
 import { NativeEventEmitter, NativeModules } from 'react-native';
 
-import { getName } from '../../app/functions';
+import { getName } from '../../app/functions.native';
 
 /**
  * Thin wrapper around Apple's CallKit functionality.
@@ -35,7 +35,7 @@ if (CallKit) {
     CallKit = {
         ...CallKit,
         addListener: eventEmitter.addListener.bind(eventEmitter),
-        registerSubscriptions(context, delegate) {
+        registerSubscriptions(context: any, delegate: any) {
             CallKit.setProviderConfiguration({
                 iconTemplateImageName: 'CallKitIcon',
                 localizedName: getName()
diff --git a/react/features/mobile/call-integration/ConnectionService.js b/react/features/mobile/call-integration/ConnectionService.ts
similarity index 95%
rename from react/features/mobile/call-integration/ConnectionService.js
rename to react/features/mobile/call-integration/ConnectionService.ts
index 32d82c08e7..b698ba752d 100644
--- a/react/features/mobile/call-integration/ConnectionService.js
+++ b/react/features/mobile/call-integration/ConnectionService.ts
@@ -11,7 +11,7 @@ if (ConnectionService) {
     ConnectionService = {
         ...ConnectionService,
         addListener: eventEmitter.addListener.bind(eventEmitter),
-        registerSubscriptions(context, delegate) {
+        registerSubscriptions(context: any, delegate: any) {
             return [
                 ConnectionService.addListener(
                     'org.jitsi.meet:features/connection_service#disconnect',
diff --git a/react/features/mobile/call-integration/functions.js b/react/features/mobile/call-integration/functions.ts
similarity index 84%
rename from react/features/mobile/call-integration/functions.js
rename to react/features/mobile/call-integration/functions.ts
index 747e9e8a9c..42bce9f773 100644
--- a/react/features/mobile/call-integration/functions.js
+++ b/react/features/mobile/call-integration/functions.ts
@@ -1,5 +1,4 @@
-// @flow
-
+import { IStateful } from '../../base/app/types';
 import { CALL_INTEGRATION_ENABLED } from '../../base/flags/constants';
 import { getFeatureFlag } from '../../base/flags/functions';
 import { toState } from '../../base/redux/functions';
@@ -11,7 +10,7 @@ import { toState } from '../../base/redux/functions';
  * function.
  * @returns {string} - Default URL for the app.
  */
-export function isCallIntegrationEnabled(stateful: Function | Object) {
+export function isCallIntegrationEnabled(stateful: IStateful) {
     const state = toState(stateful);
     const { disableCallIntegration } = state['features/base/settings'];
     const flag = getFeatureFlag(state, CALL_INTEGRATION_ENABLED);
diff --git a/react/features/mobile/call-integration/middleware.js b/react/features/mobile/call-integration/middleware.ts
similarity index 92%
rename from react/features/mobile/call-integration/middleware.js
rename to react/features/mobile/call-integration/middleware.ts
index 3318802940..eb96516a9f 100644
--- a/react/features/mobile/call-integration/middleware.js
+++ b/react/features/mobile/call-integration/middleware.ts
@@ -1,11 +1,11 @@
-// @flow
-
 import { Alert, NativeModules, Platform } from 'react-native';
+import { AnyAction } from 'redux';
 import { v4 as uuidv4 } from 'uuid';
 
 import { createTrackMutedEvent } from '../../analytics/AnalyticsEvents';
 import { sendAnalytics } from '../../analytics/functions';
 import { appNavigate } from '../../app/actions';
+import { IReduxState, IStore } from '../../app/types';
 import { APP_WILL_MOUNT, APP_WILL_UNMOUNT } from '../../base/app/actionTypes';
 import { SET_AUDIO_ONLY } from '../../base/audio-only/actionTypes';
 import {
@@ -19,6 +19,7 @@ import {
     getConferenceName,
     getCurrentConference
 } from '../../base/conference/functions';
+import { IJitsiConference } from '../../base/conference/reducer';
 import { getInviteURL } from '../../base/connection/functions';
 import { setAudioMuted } from '../../base/media/actions';
 import { MEDIA_TYPE } from '../../base/media/constants';
@@ -104,7 +105,7 @@ CallIntegration && MiddlewareRegistry.register(store => next => action => {
  * @private
  * @returns {*} The value returned by {@code next(action)}.
  */
-function _appWillMount({ dispatch, getState }, next, action) {
+function _appWillMount({ dispatch, getState }: IStore, next: Function, action: AnyAction) {
     const result = next(action);
 
     const context = {
@@ -142,7 +143,7 @@ function _appWillMount({ dispatch, getState }, next, action) {
  * @private
  * @returns {*} The value returned by {@code next(action)}.
  */
-function _conferenceFailed({ getState }, next, action) {
+function _conferenceFailed({ getState }: IStore, next: Function, action: AnyAction) {
     const result = next(action);
 
     if (!isCallIntegrationEnabled(getState)) {
@@ -177,7 +178,7 @@ function _conferenceFailed({ getState }, next, action) {
  * @private
  * @returns {*} The value returned by {@code next(action)}.
  */
-function _conferenceJoined({ getState }, next, action) {
+function _conferenceJoined({ getState }: IStore, next: Function, action: AnyAction) {
     const result = next(action);
 
     if (!isCallIntegrationEnabled(getState)) {
@@ -222,7 +223,7 @@ function _conferenceJoined({ getState }, next, action) {
  * @private
  * @returns {*} The value returned by {@code next(action)}.
  */
-function _conferenceLeft({ getState }, next, action) {
+function _conferenceLeft({ getState }: IStore, next: Function, action: AnyAction) {
     const result = next(action);
 
     if (!isCallIntegrationEnabled(getState)) {
@@ -252,7 +253,7 @@ function _conferenceLeft({ getState }, next, action) {
  * @private
  * @returns {*} The value returned by {@code next(action)}.
  */
-function _conferenceWillJoin({ dispatch, getState }, next, action) {
+function _conferenceWillJoin({ dispatch, getState }: IStore, next: Function, action: AnyAction) {
     const result = next(action);
 
     if (!isCallIntegrationEnabled(getState)) {
@@ -292,7 +293,7 @@ function _conferenceWillJoin({ dispatch, getState }, next, action) {
                 _updateCallIntegrationMuted(conference, state);
             }
         })
-        .catch(error => {
+        .catch((error: any) => {
             // Currently this error codes are emitted only by Android.
             //
             if (error.code === 'CREATE_OUTGOING_CALL_FAILED') {
@@ -327,7 +328,7 @@ function _conferenceWillJoin({ dispatch, getState }, next, action) {
  * @param {Object} state - Redux store.
  * @returns {void}
  */
-function _handleConnectionServiceFailure(state: Object) {
+function _handleConnectionServiceFailure(state: IReduxState) {
     const conference = getCurrentConference(state);
 
     if (conference) {
@@ -356,8 +357,9 @@ function _handleConnectionServiceFailure(state: Object) {
  * {@code performEndCallAction}.
  * @returns {void}
  */
-function _onPerformEndCallAction({ callUUID }) {
-    const { dispatch, getState } = this; // eslint-disable-line no-invalid-this
+function _onPerformEndCallAction({ callUUID }: { callUUID: string; }) {
+    // @ts-ignore
+    const { dispatch, getState } = this; // eslint-disable-line @typescript-eslint/no-invalid-this
     const conference = getCurrentConference(getState);
 
     if (conference && conference.callUUID === callUUID) {
@@ -376,8 +378,9 @@ function _onPerformEndCallAction({ callUUID }) {
  * {@code performSetMutedCallAction}.
  * @returns {void}
  */
-function _onPerformSetMutedCallAction({ callUUID, muted }) {
-    const { dispatch, getState } = this; // eslint-disable-line no-invalid-this
+function _onPerformSetMutedCallAction({ callUUID, muted }: { callUUID: string; muted: boolean; }) {
+    // @ts-ignore
+    const { dispatch, getState } = this; // eslint-disable-line @typescript-eslint/no-invalid-this
     const conference = getCurrentConference(getState);
 
     if (conference && conference.callUUID === callUUID) {
@@ -408,7 +411,7 @@ function _onPerformSetMutedCallAction({ callUUID, muted }) {
  * @private
  * @returns {*} The value returned by {@code next(action)}.
  */
-function _setAudioOnly({ getState }, next, action) {
+function _setAudioOnly({ getState }: IStore, next: Function, action: AnyAction) {
     const result = next(action);
     const state = getState();
 
@@ -418,7 +421,7 @@ function _setAudioOnly({ getState }, next, action) {
 
     const conference = getCurrentConference(state);
 
-    if (conference && conference.callUUID) {
+    if (conference?.callUUID) {
         CallIntegration.updateCall(
             conference.callUUID,
             { hasVideo: !action.audioOnly });
@@ -442,7 +445,7 @@ function _setAudioOnly({ getState }, next, action) {
  * @private
  * @returns {*} The value returned by {@code next(action)}.
  */
-function _setCallKitSubscriptions({ getState }, next, action) {
+function _setCallKitSubscriptions({ getState }: IStore, next: Function, action: AnyAction) {
     const { subscriptions } = getState()['features/call-integration'];
 
     if (subscriptions) {
@@ -466,7 +469,7 @@ function _setCallKitSubscriptions({ getState }, next, action) {
  * @private
  * @returns {*} The value returned by {@code next(action)}.
  */
-function _syncTrackState({ getState }, next, action) {
+function _syncTrackState({ getState }: IStore, next: Function, action: AnyAction) {
     const result = next(action);
 
     if (!isCallIntegrationEnabled(getState)) {
@@ -504,7 +507,7 @@ function _syncTrackState({ getState }, next, action) {
  * @private
  * @returns {void}
  */
-function _updateCallIntegrationMuted(conference, state) {
+function _updateCallIntegrationMuted(conference: IJitsiConference, state: IReduxState) {
     const muted = isLocalTrackMuted(state['features/base/tracks'], MEDIA_TYPE.AUDIO);
 
     CallIntegration.setMuted(conference.callUUID, muted);
diff --git a/react/features/mobile/external-api/logger.js b/react/features/mobile/external-api/logger.ts
similarity index 92%
rename from react/features/mobile/external-api/logger.js
rename to react/features/mobile/external-api/logger.ts
index c256dd8484..d8482617d5 100644
--- a/react/features/mobile/external-api/logger.js
+++ b/react/features/mobile/external-api/logger.ts
@@ -1,5 +1,3 @@
-// @flow
-
 import { getLogger } from '../../base/logging/functions';
 
 export default getLogger('features/mobile/external-api');
diff --git a/react/features/mobile/external-api/middleware.js b/react/features/mobile/external-api/middleware.ts
similarity index 93%
rename from react/features/mobile/external-api/middleware.js
rename to react/features/mobile/external-api/middleware.ts
index 6a76560b76..eb24b9e258 100644
--- a/react/features/mobile/external-api/middleware.js
+++ b/react/features/mobile/external-api/middleware.ts
@@ -1,10 +1,11 @@
-// @flow
-
 import debounce from 'lodash/debounce';
 import { NativeEventEmitter, NativeModules } from 'react-native';
+import { AnyAction } from 'redux';
 
+// @ts-expect-error
 import { ENDPOINT_TEXT_MESSAGE_NAME } from '../../../../modules/API/constants';
 import { appNavigate } from '../../app/actions';
+import { IStore } from '../../app/types';
 import { APP_WILL_MOUNT, APP_WILL_UNMOUNT } from '../../base/app/actionTypes';
 import {
     CONFERENCE_FAILED,
@@ -19,6 +20,7 @@ import {
     getCurrentConference,
     isRoomValid
 } from '../../base/conference/functions';
+import { IJitsiConference } from '../../base/conference/reducer';
 import { CONNECTION_DISCONNECTED } from '../../base/connection/actionTypes';
 import {
     JITSI_CONNECTION_CONFERENCE_KEY,
@@ -36,10 +38,12 @@ import {
     getRemoteParticipants,
     isScreenShareParticipant
 } from '../../base/participants/functions';
+import { IParticipant } from '../../base/participants/types';
 import MiddlewareRegistry from '../../base/redux/MiddlewareRegistry';
 import StateListenerRegistry from '../../base/redux/StateListenerRegistry';
 import { toggleScreensharing } from '../../base/tracks/actions.native';
 import { getLocalTracks, isLocalTrackMuted } from '../../base/tracks/functions.native';
+import { ITrack } from '../../base/tracks/types';
 import { CLOSE_CHAT, OPEN_CHAT } from '../../chat/actionTypes';
 import { openChat } from '../../chat/actions';
 import { closeChat, sendMessage, setPrivateMessageRecipient } from '../../chat/actions.any';
@@ -237,7 +241,7 @@ MiddlewareRegistry.register(store => next => action => {
  */
 StateListenerRegistry.register(
     /* selector */ state => state['features/base/tracks'],
-    /* listener */ debounce((tracks, store) => {
+    /* listener */ debounce((tracks: ITrack[], store: IStore) => {
         const oldScreenShares = store.getState()['features/mobile/external-api'].screenShares || [];
         const newScreenShares = tracks
             .filter(track => track.mediaType === 'video' && track.videoType === 'desktop')
@@ -277,7 +281,7 @@ StateListenerRegistry.register(
  * @param {Participant} participant - The participant object from the redux store.
  * @returns {Object} - The participant info object.
  */
-function _participantToParticipantInfo(participant) {
+function _participantToParticipantInfo(participant: IParticipant) {
     return {
         isLocal: participant.local,
         email: participant.email,
@@ -296,7 +300,7 @@ function _participantToParticipantInfo(participant) {
  * @private
  * @returns {void}
  */
-function _registerForNativeEvents(store) {
+function _registerForNativeEvents(store: IStore) {
     const { getState, dispatch } = store;
 
     eventEmitter.addListener(ExternalAPI.HANG_UP, () => {
@@ -315,7 +319,7 @@ function _registerForNativeEvents(store) {
         const conference = getCurrentConference(getState());
 
         try {
-            conference && conference.sendEndpointMessage(to, {
+            conference?.sendEndpointMessage(to, {
                 name: ENDPOINT_TEXT_MESSAGE_NAME,
                 text: message
             });
@@ -334,7 +338,7 @@ function _registerForNativeEvents(store) {
         const remoteParticipants = getRemoteParticipants(store);
         const localParticipant = getLocalParticipant(store);
 
-        participantsInfo.push(_participantToParticipantInfo(localParticipant));
+        localParticipant && participantsInfo.push(_participantToParticipantInfo(localParticipant));
         remoteParticipants.forEach(participant => {
             if (!participant.fakeParticipant) {
                 participantsInfo.push(_participantToParticipantInfo(participant));
@@ -401,12 +405,12 @@ function _unregisterForNativeEvents() {
  * @private
  * @returns {void}
  */
-function _registerForEndpointTextMessages(store) {
+function _registerForEndpointTextMessages(store: IStore) {
     const conference = getCurrentConference(store.getState());
 
-    conference && conference.on(
+    conference?.on(
         JitsiConferenceEvents.ENDPOINT_MESSAGE_RECEIVED,
-        (...args) => {
+        (...args: any[]) => {
             if (args && args.length >= 2) {
                 const [ sender, eventData ] = args;
 
@@ -422,9 +426,9 @@ function _registerForEndpointTextMessages(store) {
             }
         });
 
-    conference.on(
+    conference?.on(
         JitsiConferenceEvents.MESSAGE_RECEIVED,
-            (id, message, timestamp) => {
+            (id: string, message: string, timestamp: number) => {
                 sendEvent(
                     store,
                     CHAT_MESSAGE_RECEIVED,
@@ -437,10 +441,10 @@ function _registerForEndpointTextMessages(store) {
             }
     );
 
-    conference.on(
+    conference?.on(
         JitsiConferenceEvents.PRIVATE_MESSAGE_RECEIVED,
-            (id, message, timestamp) => {
-                sendEvent(
+        (id: string, message: string, timestamp: number) => {
+            sendEvent(
                     store,
                     CHAT_MESSAGE_RECEIVED,
                     /* data */ {
@@ -449,7 +453,7 @@ function _registerForEndpointTextMessages(store) {
                         isPrivate: true,
                         timestamp
                     });
-            }
+        }
     );
 }
 
@@ -462,7 +466,7 @@ function _registerForEndpointTextMessages(store) {
  * {@code error}.
  */
 function _toErrorString(
-        error: Error | { message: ?string, name: ?string } | string) {
+        error: Error | { message?: string; name?: string; } | string) {
     // XXX In lib-jitsi-meet and jitsi-meet we utilize errors in the form of
     // strings, Error instances, and plain objects which resemble Error.
     return (
@@ -487,7 +491,7 @@ function _toErrorString(
  * @param {Action} action - The redux action.
  * @returns {void}
  */
-function _maybeTriggerEarlyConferenceWillJoin(store, action) {
+function _maybeTriggerEarlyConferenceWillJoin(store: IStore, action: AnyAction) {
     const { locationURL } = store.getState()['features/base/connection'];
     const { room } = action;
 
@@ -518,18 +522,19 @@ function _normalizeUrl(url: URL) {
  * @returns {void}
  */
 function _sendConferenceEvent(
-        store: Object,
+        store: IStore,
         action: {
-            conference: Object,
-            type: string,
-            url: ?string
+            conference: IJitsiConference;
+            isAudioMuted?: boolean;
+            type: string;
+            url?: string;
         }) {
     const { conference, type, ...data } = action;
 
     // For these (redux) actions, conference identifies a JitsiConference
     // instance. The external API cannot transport such an object so we have to
     // transport an "equivalent".
-    if (conference) {
+    if (conference) { // @ts-ignore
         data.url = _normalizeUrl(conference[JITSI_CONFERENCE_URL_KEY]);
 
         const localTracks = getLocalTracks(store.getState()['features/base/tracks']);
@@ -569,7 +574,7 @@ function _sendConferenceEvent(
  * @returns {boolean} If the specified event is to not be sent, {@code true};
  * otherwise, {@code false}.
  */
-function _swallowConferenceLeft({ getState }, action, { url }) {
+function _swallowConferenceLeft({ getState }: IStore, action: AnyAction, { url }: { url: string; }) {
     // XXX Internally, we work with JitsiConference instances. Externally
     // though, we deal with URL strings. The relation between the two is many to
     // one so it's technically and practically possible (by externally loading
@@ -602,7 +607,7 @@ function _swallowConferenceLeft({ getState }, action, { url }) {
  * @returns {boolean} If the specified event is to not be sent, {@code true};
  * otherwise, {@code false}.
  */
-function _swallowEvent(store, action, data) {
+function _swallowEvent(store: IStore, action: AnyAction, data: any) {
     switch (action.type) {
     case CONFERENCE_LEFT:
         return _swallowConferenceLeft(store, action, data);
diff --git a/react/features/mobile/full-screen/actions.js b/react/features/mobile/full-screen/actions.ts
similarity index 86%
rename from react/features/mobile/full-screen/actions.js
rename to react/features/mobile/full-screen/actions.ts
index 20450046e6..e09209d9f0 100644
--- a/react/features/mobile/full-screen/actions.js
+++ b/react/features/mobile/full-screen/actions.ts
@@ -1,5 +1,3 @@
-// @flow
-
 import { _SET_IMMERSIVE_LISTENER } from './actionTypes';
 
 /**
@@ -13,7 +11,7 @@ import { _SET_IMMERSIVE_LISTENER } from './actionTypes';
  *     listener: ?Function
  * }}
  */
-export function _setImmersiveListener(listener: ?Function) {
+export function _setImmersiveListener(listener?: Function) {
     return {
         type: _SET_IMMERSIVE_LISTENER,
         listener
diff --git a/react/features/mobile/full-screen/middleware.js b/react/features/mobile/full-screen/middleware.ts
similarity index 95%
rename from react/features/mobile/full-screen/middleware.js
rename to react/features/mobile/full-screen/middleware.ts
index a1901762c7..72f72bf7d3 100644
--- a/react/features/mobile/full-screen/middleware.js
+++ b/react/features/mobile/full-screen/middleware.ts
@@ -1,7 +1,8 @@
-// @flow
-
+// @ts-expect-error
 import { Immersive } from 'react-native-immersive';
+import { AnyAction } from 'redux';
 
+import { IStore } from '../../app/types';
 import { APP_WILL_MOUNT, APP_WILL_UNMOUNT } from '../../base/app/actionTypes';
 import { getCurrentConference } from '../../base/conference/functions';
 import { isAnyDialogOpen } from '../../base/dialog/functions';
@@ -69,7 +70,7 @@ StateListenerRegistry.register(
  * @private
  * @returns {void}
  */
-function _onImmersiveChange({ getState }) {
+function _onImmersiveChange({ getState }: IStore) {
     const state = getState();
     const { appState } = state['features/background'];
 
@@ -115,7 +116,7 @@ function _setFullScreen(fullScreen: boolean) {
  * @private
  * @returns {Object} The value returned by {@code next(action)}.
  */
-function _setImmersiveListenerF({ getState }, next, action) {
+function _setImmersiveListenerF({ getState }: IStore, next: Function, action: AnyAction) {
     // XXX The React Native module Immersive is only implemented on Android and
     // throws on other platforms.
     if (Platform.OS === 'android') {
diff --git a/react/features/mobile/navigation/components/lobby/components/LobbyNavigationContainer.js b/react/features/mobile/navigation/components/lobby/components/LobbyNavigationContainer.tsx
similarity index 91%
rename from react/features/mobile/navigation/components/lobby/components/LobbyNavigationContainer.js
rename to react/features/mobile/navigation/components/lobby/components/LobbyNavigationContainer.tsx
index 00d218971d..be23564244 100644
--- a/react/features/mobile/navigation/components/lobby/components/LobbyNavigationContainer.js
+++ b/react/features/mobile/navigation/components/lobby/components/LobbyNavigationContainer.tsx
@@ -3,6 +3,7 @@ import { createStackNavigator } from '@react-navigation/stack';
 import React from 'react';
 import { useSelector } from 'react-redux';
 
+import { IReduxState } from '../../../../../app/types';
 import LobbyChatScreen from '../../../../../lobby/components/native/LobbyChatScreen';
 import LobbyScreen from '../../../../../lobby/components/native/LobbyScreen';
 import { screen } from '../../../routes';
@@ -18,12 +19,14 @@ const LobbyStack = createStackNavigator();
 
 const LobbyNavigationContainer = () => {
     const { isLobbyChatActive }
-        = useSelector(state => state['features/chat']);
+        = useSelector((state: IReduxState) => state['features/chat']);
 
     return (
         <NavigationContainer
             independent = { true }
             ref = { lobbyNavigationContainerRef }
+
+            // @ts-ignore
             theme = { navigationContainerTheme }>
             <LobbyStack.Navigator
                 screenOptions = {{
diff --git a/react/features/mobile/navigation/components/welcome/functions.js b/react/features/mobile/navigation/components/welcome/functions.tsx
similarity index 74%
rename from react/features/mobile/navigation/components/welcome/functions.js
rename to react/features/mobile/navigation/components/welcome/functions.tsx
index 2e3b7fa88c..ff8ed8a561 100644
--- a/react/features/mobile/navigation/components/welcome/functions.js
+++ b/react/features/mobile/navigation/components/welcome/functions.tsx
@@ -1,12 +1,10 @@
-// @flow
-
 import React from 'react';
+import { GestureResponderEvent } from 'react-native';
 
 import { IconArrowBack } from '../../../../base/icons/svg';
 import HeaderNavigationButton
     from '../HeaderNavigationButton';
 
-
 /**
  * Render header arrow back button for navigation.
  *
@@ -14,7 +12,7 @@ import HeaderNavigationButton
  * function.
  * @returns {ReactElement}
  */
-export function renderArrowBackButton(onPress: Function) {
+export function renderArrowBackButton(onPress: (e?: GestureResponderEvent | MouseEvent) => void) {
     return (
         <HeaderNavigationButton
             onPress = { onPress }
diff --git a/react/features/mobile/navigation/middleware.js b/react/features/mobile/navigation/middleware.ts
similarity index 82%
rename from react/features/mobile/navigation/middleware.js
rename to react/features/mobile/navigation/middleware.ts
index 6a25dee3be..1c9abbc240 100644
--- a/react/features/mobile/navigation/middleware.js
+++ b/react/features/mobile/navigation/middleware.ts
@@ -1,9 +1,11 @@
-import { appNavigate } from '../../app/actions';
+import { AnyAction } from 'redux';
+
+import { appNavigate } from '../../app/actions.native';
+import { IStore } from '../../app/types';
 import { CONFERENCE_FAILED } from '../../base/conference/actionTypes';
 import { JitsiConferenceErrors } from '../../base/lib-jitsi-meet';
 import MiddlewareRegistry from '../../base/redux/MiddlewareRegistry';
 
-
 MiddlewareRegistry.register(store => next => action => {
     switch (action.type) {
 
@@ -23,7 +25,7 @@ MiddlewareRegistry.register(store => next => action => {
  * @param {Object} action - The Redux action.
  * @returns {Object}
  */
-function _conferenceFailed({ dispatch }, next, action) {
+function _conferenceFailed({ dispatch }: IStore, next: Function, action: AnyAction) {
     const { error } = action;
 
     // We need to cover the case where knocking participant
diff --git a/react/features/mobile/permissions/middleware.js b/react/features/mobile/permissions/middleware.ts
similarity index 96%
rename from react/features/mobile/permissions/middleware.js
rename to react/features/mobile/permissions/middleware.ts
index 7456f748db..eaff2d9f79 100644
--- a/react/features/mobile/permissions/middleware.js
+++ b/react/features/mobile/permissions/middleware.ts
@@ -1,5 +1,3 @@
-/* @flow */
-
 import { Alert } from 'react-native';
 
 import { isRoomValid } from '../../base/conference/functions';
@@ -47,7 +45,7 @@ MiddlewareRegistry.register(store => next => action => {
  * @private
  * @returns {void}
  */
-function _alertPermissionErrorWithSettings(trackType) {
+function _alertPermissionErrorWithSettings(trackType: string) {
     /* eslint-disable indent */
     const message = trackType === 'video'
         ? i18next.t('dialog.permissionCameraRequiredError')
diff --git a/react/features/mobile/picture-in-picture/actions.js b/react/features/mobile/picture-in-picture/actions.ts
similarity index 87%
rename from react/features/mobile/picture-in-picture/actions.js
rename to react/features/mobile/picture-in-picture/actions.ts
index 1a5f16296e..ec54a4fcf3 100644
--- a/react/features/mobile/picture-in-picture/actions.js
+++ b/react/features/mobile/picture-in-picture/actions.ts
@@ -1,8 +1,6 @@
-// @flow
-
 import { NativeModules } from 'react-native';
-import type { Dispatch } from 'redux';
 
+import { IStore } from '../../app/types';
 import { PIP_ENABLED } from '../../base/flags/constants';
 import { getFeatureFlag } from '../../base/flags/functions';
 import Platform from '../../base/react/Platform.native';
@@ -21,7 +19,7 @@ import logger from './logger';
  * @returns {Function}
  */
 export function enterPictureInPicture() {
-    return (dispatch: Dispatch<any>, getState: Function) => {
+    return (dispatch: IStore['dispatch'], getState: IStore['getState']) => {
         // XXX At the time of this writing this action can only be dispatched by
         // the button which is on the conference view, which means that it's
         // fine to enter PiP mode.
@@ -37,7 +35,7 @@ export function enterPictureInPicture() {
 
             p.then(
                 () => dispatch({ type: ENTER_PICTURE_IN_PICTURE }),
-                e => logger.warn(`Error entering PiP mode: ${e}`));
+                (e: string) => logger.warn(`Error entering PiP mode: ${e}`));
         }
     };
 }
diff --git a/react/features/mobile/picture-in-picture/components/PictureInPictureButton.js b/react/features/mobile/picture-in-picture/components/PictureInPictureButton.ts
similarity index 88%
rename from react/features/mobile/picture-in-picture/components/PictureInPictureButton.js
rename to react/features/mobile/picture-in-picture/components/PictureInPictureButton.ts
index 44713d21b2..6296ffec96 100644
--- a/react/features/mobile/picture-in-picture/components/PictureInPictureButton.js
+++ b/react/features/mobile/picture-in-picture/components/PictureInPictureButton.ts
@@ -1,33 +1,27 @@
-// @flow
-
 import { NativeModules, Platform } from 'react-native';
 import { connect } from 'react-redux';
 
+import { IReduxState } from '../../../app/types';
 import { PIP_ENABLED, PIP_WHILE_SCREEN_SHARING_ENABLED } from '../../../base/flags/constants';
 import { getFeatureFlag } from '../../../base/flags/functions';
 import { translate } from '../../../base/i18n/functions';
 import { IconArrowDown } from '../../../base/icons/svg';
 import AbstractButton, { IProps as AbstractButtonProps } from '../../../base/toolbox/components/AbstractButton';
-import { isLocalVideoTrackDesktop } from '../../../base/tracks/functions';
+import { isLocalVideoTrackDesktop } from '../../../base/tracks/functions.native';
 import { enterPictureInPicture } from '../actions';
 
-type Props = AbstractButtonProps & {
+interface IProps extends AbstractButtonProps {
 
     /**
      * Whether Picture-in-Picture is enabled or not.
      */
-    _enabled: boolean,
-
-    /**
-     * The redux {@code dispatch} function.
-     */
-    dispatch: Function
-};
+    _enabled: boolean;
+}
 
 /**
  * An implementation of a button for entering Picture-in-Picture mode.
  */
-class PictureInPictureButton extends AbstractButton<Props, *> {
+class PictureInPictureButton extends AbstractButton<IProps> {
     accessibilityLabel = 'toolbar.accessibilityLabel.pip';
     icon = IconArrowDown;
     label = 'toolbar.pip';
@@ -63,7 +57,7 @@ class PictureInPictureButton extends AbstractButton<Props, *> {
  *     _enabled: boolean
  * }}
  */
-function _mapStateToProps(state) {
+function _mapStateToProps(state: IReduxState) {
     const pipEnabled = Boolean(getFeatureFlag(state, PIP_ENABLED));
     const pipWhileScreenSharingEnabled = getFeatureFlag(state, PIP_WHILE_SCREEN_SHARING_ENABLED, false);
 
diff --git a/react/features/mobile/picture-in-picture/logger.js b/react/features/mobile/picture-in-picture/logger.ts
similarity index 91%
rename from react/features/mobile/picture-in-picture/logger.js
rename to react/features/mobile/picture-in-picture/logger.ts
index 2b21a05e54..280c99cf29 100644
--- a/react/features/mobile/picture-in-picture/logger.js
+++ b/react/features/mobile/picture-in-picture/logger.ts
@@ -1,5 +1,3 @@
-// @flow
-
 import { getLogger } from '../../base/logging/functions';
 
 export default getLogger('features/mobile/pip');
diff --git a/react/features/mobile/proximity/middleware.js b/react/features/mobile/proximity/middleware.ts
similarity index 96%
rename from react/features/mobile/proximity/middleware.js
rename to react/features/mobile/proximity/middleware.ts
index 87d54ea0f6..e11eb76338 100644
--- a/react/features/mobile/proximity/middleware.js
+++ b/react/features/mobile/proximity/middleware.ts
@@ -29,6 +29,6 @@ StateListenerRegistry.register(
  * @private
  * @returns {void}
  */
-function _setProximityEnabled(enabled) {
+function _setProximityEnabled(enabled: boolean) {
     NativeModules.Proximity.setEnabled(Boolean(enabled));
 }
diff --git a/react/features/mobile/wake-lock/middleware.js b/react/features/mobile/wake-lock/middleware.ts
similarity index 95%
rename from react/features/mobile/wake-lock/middleware.js
rename to react/features/mobile/wake-lock/middleware.ts
index d984bf86fc..eb8f4631b5 100644
--- a/react/features/mobile/wake-lock/middleware.js
+++ b/react/features/mobile/wake-lock/middleware.ts
@@ -26,7 +26,7 @@ StateListenerRegistry.register(
  * @private
  * @returns {void}
  */
-function _setWakeLock(wakeLock) {
+function _setWakeLock(wakeLock: boolean) {
     if (wakeLock) {
         KeepAwake.activate();
     } else {
diff --git a/react/features/mobile/watchos/actions.js b/react/features/mobile/watchos/actions.ts
similarity index 99%
rename from react/features/mobile/watchos/actions.js
rename to react/features/mobile/watchos/actions.ts
index df98b0cfbb..75961dfccc 100644
--- a/react/features/mobile/watchos/actions.js
+++ b/react/features/mobile/watchos/actions.ts
@@ -1,5 +1,3 @@
-// @flow
-
 import { SET_CONFERENCE_TIMESTAMP, SET_SESSION_ID, SET_WATCH_REACHABLE } from './actionTypes';
 
 /**
diff --git a/react/features/mobile/watchos/logger.js b/react/features/mobile/watchos/logger.ts
similarity index 91%
rename from react/features/mobile/watchos/logger.js
rename to react/features/mobile/watchos/logger.ts
index cb29b386ff..642a767365 100644
--- a/react/features/mobile/watchos/logger.js
+++ b/react/features/mobile/watchos/logger.ts
@@ -1,5 +1,3 @@
-// @flow
-
 import { getLogger } from '../../base/logging/functions';
 
 export default getLogger('features/mobile/watchos');
diff --git a/react/features/mobile/watchos/middleware.js b/react/features/mobile/watchos/middleware.ts
similarity index 93%
rename from react/features/mobile/watchos/middleware.js
rename to react/features/mobile/watchos/middleware.ts
index a0efbf7dac..c8a1de1f8d 100644
--- a/react/features/mobile/watchos/middleware.js
+++ b/react/features/mobile/watchos/middleware.ts
@@ -1,10 +1,10 @@
-// @flow
-
 import { NativeModules, Platform } from 'react-native';
 import { updateApplicationContext, watchEvents } from 'react-native-watch-connectivity';
 
 import { appNavigate } from '../../app/actions';
+import { IStore } from '../../app/types';
 import { APP_WILL_MOUNT } from '../../base/app/actionTypes';
+import { IStateful } from '../../base/app/types';
 import { CONFERENCE_JOINED } from '../../base/conference/actionTypes';
 import { getCurrentConferenceUrl } from '../../base/connection/functions';
 import { setAudioMuted } from '../../base/media/actions';
@@ -68,7 +68,7 @@ watchOSEnabled && MiddlewareRegistry.register(store => next => action => {
  * @private
  * @returns {void}
  */
-function _appWillMount({ dispatch, getState }) {
+function _appWillMount({ dispatch, getState }: IStore) {
     watchEvents.addListener('reachability', reachable => {
         dispatch(setWatchReachable(reachable));
         _updateApplicationContext(getState);
@@ -96,7 +96,7 @@ function _appWillMount({ dispatch, getState }) {
             }
             break;
         case CMD_JOIN_CONFERENCE: {
-            const newConferenceURL = message.data;
+            const newConferenceURL: any = message.data;
             const oldConferenceURL = getCurrentConferenceUrl(getState());
 
             if (oldConferenceURL !== newConferenceURL) {
@@ -122,7 +122,7 @@ function _appWillMount({ dispatch, getState }) {
  * @returns {number}
  * @private
  */
-function _getSessionId(stateful) {
+function _getSessionId(stateful: IStateful) {
     const state = toState(stateful);
 
     return state['features/mobile/watchos'].sessionID;
@@ -135,7 +135,7 @@ function _getSessionId(stateful) {
  * @returns {Array<Object>}
  * @private
  */
-function _getRecentUrls(stateful) {
+function _getRecentUrls(stateful: IStateful) {
     const state = toState(stateful);
     const recentURLs = state['features/recent-list'];
 
@@ -154,7 +154,7 @@ function _getRecentUrls(stateful) {
  * @returns {boolean}
  * @private
  */
-function _isAudioMuted(stateful) {
+function _isAudioMuted(stateful: IStateful) {
     const state = toState(stateful);
     const { audio } = state['features/base/media'];
 
@@ -169,7 +169,7 @@ function _isAudioMuted(stateful) {
  * @private
  * @returns {void}
  */
-function _updateApplicationContext(stateful) {
+function _updateApplicationContext(stateful: IStateful) {
     const state = toState(stateful);
     const { conferenceTimestamp, sessionID, watchReachable } = state['features/mobile/watchos'];
 
diff --git a/react/features/recent-list/components/AbstractRecentList.tsx b/react/features/recent-list/components/AbstractRecentList.tsx
index efaeeb1ee8..09ca172639 100644
--- a/react/features/recent-list/components/AbstractRecentList.tsx
+++ b/react/features/recent-list/components/AbstractRecentList.tsx
@@ -7,7 +7,6 @@ import { IStore } from '../../app/types';
 import AbstractPage from '../../base/react/components/AbstractPage';
 import { Container, Text } from '../../base/react/components/index';
 
-// @ts-ignore
 import styles from './styles';
 
 /**
diff --git a/react/features/recent-list/components/styles.web.js b/react/features/recent-list/components/styles.web.js
deleted file mode 100644
index ff8b4c5632..0000000000
--- a/react/features/recent-list/components/styles.web.js
+++ /dev/null
@@ -1 +0,0 @@
-export default {};
diff --git a/react/features/recent-list/components/styles.web.ts b/react/features/recent-list/components/styles.web.ts
new file mode 100644
index 0000000000..a025b9444b
--- /dev/null
+++ b/react/features/recent-list/components/styles.web.ts
@@ -0,0 +1,4 @@
+export default {
+    emptyListContainer: {},
+    emptyListText: {}
+};
diff --git a/react/features/toolbox/components/native/ScreenSharingAndroidButton.js b/react/features/toolbox/components/native/ScreenSharingAndroidButton.ts
similarity index 88%
rename from react/features/toolbox/components/native/ScreenSharingAndroidButton.js
rename to react/features/toolbox/components/native/ScreenSharingAndroidButton.ts
index 49eb884b1a..127bab3d9c 100644
--- a/react/features/toolbox/components/native/ScreenSharingAndroidButton.js
+++ b/react/features/toolbox/components/native/ScreenSharingAndroidButton.ts
@@ -1,7 +1,6 @@
-// @flow
-
 import { connect } from 'react-redux';
 
+import { IReduxState } from '../../../app/types';
 import { ANDROID_SCREENSHARING_ENABLED } from '../../../base/flags/constants';
 import { getFeatureFlag } from '../../../base/flags/functions';
 import { translate } from '../../../base/i18n/functions';
@@ -13,28 +12,23 @@ import { isLocalVideoTrackDesktop } from '../../../base/tracks/functions.native'
 /**
  * The type of the React {@code Component} props of {@link ScreenSharingAndroidButton}.
  */
-type Props = AbstractButtonProps & {
+interface IProps extends AbstractButtonProps {
 
     /**
      * True if the button needs to be disabled.
      */
-    _disabled: boolean,
+    _disabled: boolean;
 
     /**
      * Whether video is currently muted or not.
      */
-    _screensharing: boolean,
-
-    /**
-     * The redux {@code dispatch} function.
-     */
-    dispatch: Function
-};
+    _screensharing: boolean;
+}
 
 /**
  * An implementation of a button for toggling screen sharing.
  */
-class ScreenSharingAndroidButton extends AbstractButton<Props, *> {
+class ScreenSharingAndroidButton extends AbstractButton<IProps> {
     accessibilityLabel = 'toolbar.accessibilityLabel.shareYourScreen';
     icon = IconScreenshare;
     label = 'toolbar.startScreenSharing';
@@ -85,7 +79,7 @@ class ScreenSharingAndroidButton extends AbstractButton<Props, *> {
  *     _screensharing: boolean
  * }}
  */
-function _mapStateToProps(state): Object {
+function _mapStateToProps(state: IReduxState) {
     const enabled = getFeatureFlag(state, ANDROID_SCREENSHARING_ENABLED, true);
 
     return {
diff --git a/react/features/toolbox/components/native/ScreenSharingButton.tsx b/react/features/toolbox/components/native/ScreenSharingButton.tsx
index e9c7ef1145..78cef840aa 100644
--- a/react/features/toolbox/components/native/ScreenSharingButton.tsx
+++ b/react/features/toolbox/components/native/ScreenSharingButton.tsx
@@ -5,11 +5,8 @@ import { connect } from 'react-redux';
 import { IReduxState } from '../../../app/types';
 import { isDesktopShareButtonDisabled } from '../../functions.native';
 
-// @ts-ignore
-import ScreenSharingAndroidButton from './ScreenSharingAndroidButton.js';
-// eslint-disable-next-line lines-around-comment
-// @ts-ignore
-import ScreenSharingIosButton from './ScreenSharingIosButton.js';
+import ScreenSharingAndroidButton from './ScreenSharingAndroidButton';
+import ScreenSharingIosButton from './ScreenSharingIosButton';
 
 const ScreenSharingButton = (props: any) => (
     <>
diff --git a/react/features/toolbox/components/native/ScreenSharingIosButton.js b/react/features/toolbox/components/native/ScreenSharingIosButton.tsx
similarity index 88%
rename from react/features/toolbox/components/native/ScreenSharingIosButton.js
rename to react/features/toolbox/components/native/ScreenSharingIosButton.tsx
index ef00954c62..9752086f08 100644
--- a/react/features/toolbox/components/native/ScreenSharingIosButton.js
+++ b/react/features/toolbox/components/native/ScreenSharingIosButton.tsx
@@ -1,10 +1,9 @@
-// @flow
-
 import React from 'react';
 import { NativeModules, Platform, findNodeHandle } from 'react-native';
 import { ScreenCapturePickerView } from 'react-native-webrtc';
 import { connect } from 'react-redux';
 
+import { IReduxState } from '../../../app/types';
 import { IOS_SCREENSHARING_ENABLED } from '../../../base/flags/constants';
 import { getFeatureFlag } from '../../../base/flags/functions';
 import { translate } from '../../../base/i18n/functions';
@@ -15,23 +14,18 @@ import { isLocalVideoTrackDesktop } from '../../../base/tracks/functions.native'
 /**
  * The type of the React {@code Component} props of {@link ScreenSharingIosButton}.
  */
-type Props = AbstractButtonProps & {
+interface IProps extends AbstractButtonProps {
 
     /**
      * True if the button needs to be disabled.
      */
-    _disabled: boolean,
+    _disabled: boolean;
 
     /**
      * Whether video is currently muted or not.
      */
-    _screensharing: boolean,
-
-    /**
-     * The redux {@code dispatch} function.
-     */
-    dispatch: Function
-};
+    _screensharing: boolean;
+}
 
 const styles = {
     screenCapturePickerView: {
@@ -42,9 +36,8 @@ const styles = {
 /**
  * An implementation of a button for toggling screen sharing on iOS.
  */
-class ScreenSharingIosButton extends AbstractButton<Props, *> {
-    _nativeComponent: ?Object;
-    _setNativeComponent: Function;
+class ScreenSharingIosButton extends AbstractButton<IProps> {
+    _nativeComponent: React.Component<any, any> | null;
 
     accessibilityLabel = 'toolbar.accessibilityLabel.shareYourScreen';
     icon = IconScreenshare;
@@ -57,7 +50,7 @@ class ScreenSharingIosButton extends AbstractButton<Props, *> {
    * @param {Object} props - The React {@code Component} props to initialize
    * the new {@code ScreenSharingIosButton} instance with.
    */
-    constructor(props) {
+    constructor(props: IProps) {
         super(props);
 
         this._nativeComponent = null;
@@ -77,7 +70,7 @@ class ScreenSharingIosButton extends AbstractButton<Props, *> {
             <>
                 { super.render() }
                 <ScreenCapturePickerView
-                    ref = { this._setNativeComponent }
+                    ref = { this._setNativeComponent } // @ts-ignore
                     style = { styles.screenCapturePickerView } />
             </>
         );
@@ -90,7 +83,7 @@ class ScreenSharingIosButton extends AbstractButton<Props, *> {
     * @param {ReactComponent} component - React Component.
     * @returns {void}
     */
-    _setNativeComponent(component) {
+    _setNativeComponent(component: React.Component<any, any> | null) {
         this._nativeComponent = component;
     }
 
@@ -139,7 +132,7 @@ class ScreenSharingIosButton extends AbstractButton<Props, *> {
  *     _disabled: boolean,
  * }}
  */
-function _mapStateToProps(state): Object {
+function _mapStateToProps(state: IReduxState) {
     const enabled = getFeatureFlag(state, IOS_SCREENSHARING_ENABLED, false);
 
     return {
diff --git a/react/features/visitors/components/native/VisitorsCountLabel.tsx b/react/features/visitors/components/native/VisitorsCountLabel.tsx
index c8d401650e..9477522356 100644
--- a/react/features/visitors/components/native/VisitorsCountLabel.tsx
+++ b/react/features/visitors/components/native/VisitorsCountLabel.tsx
@@ -28,14 +28,14 @@ const VisitorsCountLabel = () => {
     const visitorsCount = useSelector((state: IReduxState) =>
         state['features/visitors'].count || 0);
 
-    return !visitorsMode && visitorsCount > 0 && (
+    return !visitorsMode && visitorsCount > 0 ? (
         <Label
             icon = { IconUsers }
             iconColor = { BaseTheme.palette.uiBackground }
             style = { styles.raisedHandsCountLabel }
             text = { `${getVisitorsShortText(visitorsCount)}` }
             textStyle = { styles.raisedHandsCountLabelText } />
-    );
+    ) : null;
 };
 
 export default VisitorsCountLabel;