diff --git a/packages/react-scripts/config/webpack.config.dev.js b/packages/react-scripts/config/webpack.config.dev.js
index 3cf137781..3c27696e9 100644
--- a/packages/react-scripts/config/webpack.config.dev.js
+++ b/packages/react-scripts/config/webpack.config.dev.js
@@ -41,6 +41,7 @@ module.exports = {
// This means they will be the "root" imports that are included in JS bundle.
// The first two entry points enable "hot" CSS and auto-refreshes for JS.
entry: [
+ 'core-js/es6/symbol',
// We ship a few polyfills by default:
require.resolve('./polyfills'),
// Include an alternative client for WebpackDevServer. A client's job is to
@@ -90,7 +91,18 @@ module.exports = {
// https://github.com/facebookincubator/create-react-app/issues/290
// `web` extension prefixes have been added for better support
// for React Native Web.
- extensions: ['.web.ts', '.ts', '.web.tsx', '.tsx', '.web.js', '.mjs', '.js', '.json', '.web.jsx', '.jsx'],
+ extensions: [
+ '.web.ts',
+ '.ts',
+ '.web.tsx',
+ '.tsx',
+ '.web.js',
+ '.mjs',
+ '.js',
+ '.json',
+ '.web.jsx',
+ '.jsx',
+ ],
alias: {
// @remove-on-eject-begin
// Resolve Babel runtime relative to react-scripts.
diff --git a/packages/react-scripts/config/webpack.config.prod.js b/packages/react-scripts/config/webpack.config.prod.js
index 8badecf54..e8dfdc0ee 100644
--- a/packages/react-scripts/config/webpack.config.prod.js
+++ b/packages/react-scripts/config/webpack.config.prod.js
@@ -64,7 +64,11 @@ module.exports = {
// You can exclude the *.map files from the build during deployment.
devtool: shouldUseSourceMap ? 'source-map' : false,
// In production, we only want to load the polyfills and the app code.
- entry: [require.resolve('./polyfills'), paths.appIndexJs],
+ entry: [
+ 'core-js/es6/symbol',
+ require.resolve('./polyfills'),
+ paths.appIndexJs,
+ ],
output: {
// The build folder.
path: paths.appBuild,
@@ -96,7 +100,18 @@ module.exports = {
// https://github.com/facebookincubator/create-react-app/issues/290
// `web` extension prefixes have been added for better support
// for React Native Web.
- extensions: ['.web.ts', '.ts', '.web.tsx', '.tsx', '.web.js', '.mjs', '.js', '.json', '.web.jsx', '.jsx'],
+ extensions: [
+ '.web.ts',
+ '.ts',
+ '.web.tsx',
+ '.tsx',
+ '.web.js',
+ '.mjs',
+ '.js',
+ '.json',
+ '.web.jsx',
+ '.jsx',
+ ],
alias: {
// @remove-on-eject-begin
// Resolve Babel runtime relative to react-scripts.
@@ -151,6 +166,7 @@ module.exports = {
{
test: /\.(ts|tsx)$/,
include: paths.appSrc,
+
use: [
{
loader: require.resolve('ts-loader'),
diff --git a/packages/react-scripts/template/tsconfig.json b/packages/react-scripts/template/tsconfig.json
index 58294bb97..a99139099 100644
--- a/packages/react-scripts/template/tsconfig.json
+++ b/packages/react-scripts/template/tsconfig.json
@@ -15,7 +15,8 @@
"noImplicitAny": true,
"strictNullChecks": true,
"suppressImplicitAnyIndexErrors": true,
- "noUnusedLocals": true
+ "noUnusedLocals": true,
+ "downlevelIteration": true
},
"exclude": [
"node_modules",
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