react referenceerror 3a regeneratorruntime is not defined

1// yarn add @babel/plugin-transform-runtime --dev
2// yarn add @babel/runtime
3
4//.babelrc
5
6"plugins": [
7    ["@babel/plugin-transform-runtime",
8      {
9        "regenerator": true
10      }
11    ]
12  ],
13

1# First install the package
2yarn add babel-polyfill --dev
3# or
4npm add babel-polyfill --dev
5# Then require it in the angular.json
6"scripts": ["node_modules/babel-polyfill/dist/polyfill.min.js"]

1// In package.json add 
2{
3...
4  "browserslist": {
5    "production": [
6      ">0.2%",
7      "not dead",
8      "not op_mini all"
9    ],
10    "development": [
11      "last 1 chrome version",
12      "last 1 firefox version",
13      "last 1 safari version"
14    ]
15  }
16  ...