React App blank page IE11

[NethanjanInt]

I have create a new react app using npx command "npx create-react-app test". Then moved to the created directory to ran yarn start.

Describe the bug

Default react start page is showing without any errors or warning in Google Chorme. Then I have tested app using IE 11 browser I'm getting a blank page with two errors.

Did you try recovering your dependencies?

I have tried deleting
* node_modules
* yarn.lock
and running yarn install again. It gives same error.

Previous answers?

I am using react 16.7.0 in another app and for IE support I have just used <script src="//cdn.polyfill.io/v2/polyfill.min.js"></script> in index.html

I have tried that in new app nothing works.
Then I have tried all the previous answers installing 'react-app-polyfill' or / and 'core-js' and importing them from src/index.js. I have tried it with and without previously mentioned polyfill loading in index.html. Nothing seems to work.

Environment

System:
OS: Linux 4.15 Ubuntu 18.04.3 LTS (Bionic Beaver)
CPU: (8) x64 Intel(R) Core(TM) i7-8550U CPU @ 1.80GHz
Binaries:
Node: 12.8.1 - ~/.nvm/versions/node/v12.8.1/bin/node
Yarn: 1.19.0 - /usr/bin/yarn
npm: 6.10.2 - ~/.nvm/versions/node/v12.8.1/bin/npm
Browsers:
Chrome: 77.0.3865.90
Firefox: 69.0.1
npmPackages:
react: ^16.10.1 => 16.10.1
react-dom: ^16.10.1 => 16.10.1
react-scripts: 3.1.2 => 3.1.2
npmGlobalPackages:
create-react-app: Not Found

(paste the output of the command here.)

Steps to reproduce

1. npx create-react-app test
2. cd test
3. yarn start

Although there are previous answers for react support for IE older browser versions, I guess this is a new break for new react version. Since It's still working on react 16.7.0 for me by just using '<script src="//cdn.polyfill.io/v2/polyfill.min.js"></script>'.

[ianschmitz]

Please read this page in full: https://create-react-app.dev/docs/supported-browsers-features#configuring-supported-browsers. You need to add the appropriate polyfills and configure browserslist to get it working in ie 11.