IE11 support doesn't work in dev mode, even after adding all polyfills and enabling ie11 support

Created by: ttaranov

Describe the bug

IE11 support doesn't work even after adding react-app-polyfill, enabling "ie 11" in browserslist in package.js and adding import 'react-app-polyfill/ie11' and import 'react-app-polyfill/stable' into src/index.js

Did you try recovering your dependencies?

yes

Which terms did you search for in User Guide?

followed instructions on https://create-react-app.dev/docs/supported-browsers-features/ and https://github.com/facebook/create-react-app/blob/master/packages/react-app-polyfill/README.md

Environment

MacOS node 11.15.0 npm 6.7.0 latest create-react-app Virtual Box with Microsoft's test Window10 and IE11 image VM

Steps to reproduce

1. npx create-react-app test
2. cd test
3. npm i react-app-polyfill
4. edit package.json and add "ie 11" into "browserslist->development" section:

"browserslist": {
    "production": [
      ">0.2%",
      "not dead",
      "not op_mini all"
    ],
    "development": [
      "ie 11",
      "last 1 chrome version",
      "last 1 firefox version",
      "last 1 safari version"
    ]
  }

5. edit src/index.js and add 2 lines at the top:

import 'react-app-polyfill/ie11';
import 'react-app-polyfill/stable';

6. rm -rf node_modules/.cache
7. npm run start
8. launch IE11 VM and open http://<ip>:3000 in IE11

Expected behavior

test create react page is supposed to show up

Actual behavior

SCRIPT5022: SyntaxError 0.chunk.js (19856,1)