not working in microsoft edge and Inernet explorer

[hrc7505]

Describe the bug

I have installed react project using npx create-react-app my-app and it is running fine in chrome and firefox but showing blank screen in Microsoft Edge. It is just showing syntax error in browser console.

Did you try recovering your dependencies?

Yes.
npm version: 6.13.2
yarn version: 1.19.2
I installed two separate projects and used npm in first one and yarn in other one.

Environment

Environment Info:

System:
OS: Windows 10 10.0.17763
CPU: (4) x64 Intel(R) Core(TM) i5-4460 CPU @ 3.20GHz
Binaries:
Node: 13.1.0 - C:\Program Files\nodejs\node.EXE
Yarn: 1.19.2 - C:\Users\Hardik\AppData\Roaming\npm\yarn.CMD
npm: 6.13.2 - C:\Program Files\nodejs\npm.CMD
Browsers:
Edge: 44.17763.831.0
Internet Explorer: 11.0.17763.771
npmPackages:
react: ^16.12.0 => 16.12.0
react-dom: ^16.12.0 => 16.12.0
react-scripts: ^3.3.0 => 3.3.0
npmGlobalPackages:
create-react-app: Not Found

Steps to reproduce

1. Do npx create-react-app my-app
2. yarn start or npm start
3. Run http://localhost:3000/ in Microsoft edge ot Internet explorer

Expected behavior

(Write what you thought would happen.)
App should be run in all major browsers.

Actual behavior

App not running in edge and internet explorer. Giving syntax error in console.

[petetnt]

Hi @hrc7505!

See https://github.com/facebook/create-react-app/tree/master/packages/react-app-polyfill for polyfilling IE11/Edge support. You'll need to install the polyfill and import the relevant files.

[hrc7505]

I installed polyfill and imported the files,
import 'react-app-polyfill/ie9';
import 'react-app-polyfill/ie11';
import 'react-app-polyfill/stable';
But still it is giving same error.

I also tried solutions given in #7084, but still it is not working.

[hrc7505]

I tried #8116 and it just worked. This will fix my issue!