Error: package android.support.v4.content does not exist

I use “jetifier” for this on building my node_modules. To rebuild I remove the node_modules directory then run “npm i” to reinstall and jetifer will run after its complete and fixes those references.

Then in my package.json:

"scripts": {
    "ng": "ng",
    "start": "ng serve",
    "build": "ng build",
    "lint": "ng lint",
    "postinstall": "jetifier"
  }