You can have Prettier watch for changes from the command line by using onchange. For example:
npx onchange "**/*" -- npx prettier --write --ignore-unknown {{changed}}
 Or add the following to your package.json:
{
  "scripts": {
    "prettier-watch": "onchange \"**/*\" -- prettier --write --ignore-unknown {{changed}}"
  }
}
    © James Long and contributors
    https://prettier.io/docs/en/watching-files.html