fix(ts) make tsc (almost) not cry on native

Co-authored-by: Calinteodor <calin.chitu@8x8.com>
Co-authored-by: Robert Pintilii <robert.pin9@gmail.com>

react/features/base/util/downloadJSON.web.ts

@@ -0,0 +1,21 @@
+/**
+ * Downloads a JSON object.
+ *
+ * @param {Object} json - The JSON object to download.
+ * @param {string} filename - The filename to give to the downloaded file.
+ * @returns {void}
+ */
+export function downloadJSON(json: Object, filename: string) {
+    const data = encodeURIComponent(JSON.stringify(json, null, '  '));
+
+    const elem = document.createElement('a');
+
+    elem.download = filename;
+    elem.href = `data:application/json;charset=utf-8,\n${data}`;
+    elem.dataset.downloadurl = [ 'text/json', elem.download, elem.href ].join(':');
+    elem.dispatchEvent(new MouseEvent('click', {
+        view: window,
+        bubbles: true,
+        cancelable: false
+    }));
+}