Support TypeScript for React components

Same treatment as https://github.com/matrix-org/matrix-react-sdk/pull/4203

package.json

@@ -40,7 +40,7 @@
     "build:res": "node scripts/copy-res.js",
     "build:genfiles": "yarn reskindex && yarn build:res",
     "build:modernizr": "modernizr -c .modernizr.json -d src/vector/modernizr.js",
-    "build:compile": "babel -d lib --verbose --extensions \".ts,.js\" src",
+    "build:compile": "babel -d lib --verbose --extensions \".ts,.js,.tsx\" src",
     "build:bundle": "cross-env NODE_ENV=production webpack -p --progress --bail --mode production",
     "build:electron": "yarn build && yarn install:electron && electron-builder -wml --ia32 --x64",
     "build:electron:linux": "yarn build && electron-builder -l --x64",
@@ -94,7 +94,7 @@
     "@babel/preset-typescript": "^7.7.4",
     "@babel/register": "^7.7.4",
     "@babel/runtime": "^7.7.6",
-    "@types/react": "^16.9.17",
+    "@types/react": "16.9",
     "@types/react-dom": "^16.9.4",
     "autoprefixer": "^9.7.3",
     "babel-eslint": "^10.0.3",

tsconfig.json

@@ -10,10 +10,12 @@
     "outDir": "./lib",
     "declaration": true,
     "types": [
-      "node"
+      "node",
+      "react"
     ]
   },
   "include": [
-    "./src/**/*.ts"
+    "./src/**/*.ts",
+    "./src/**/*.tsx"
   ]
 }

webpack.config.js

@@ -82,7 +82,7 @@ module.exports = (env, argv) => {
             aliasFields: ['matrix_src_browser', 'browser'],
 
             // We need to specify that TS can be resolved without an extension
-            extensions: ['.js', '.json', '.ts'],
+            extensions: ['.js', '.json', '.ts', '.tsx'],
             alias: {
                 // alias any requires to the react module to the one in our path,
                 // otherwise we tend to get the react source included twice when

yarn.lock

@@ -1262,7 +1262,7 @@
   dependencies:
     "@types/react" "*"
 
-"@types/react@*", "@types/react@^16.9.17":
+"@types/react@*", "@types/react@16.9":
   version "16.9.23"
   resolved "https://registry.yarnpkg.com/@types/react/-/react-16.9.23.tgz#1a66c6d468ba11a8943ad958a8cb3e737568271c"
   integrity sha512-SsGVT4E7L2wLN3tPYLiF20hmZTPGuzaayVunfgXzUn1x4uHVsKH6QDJQ/TdpHqwsTLd4CwrmQ2vOgxN7gE24gw==