settings.json

{
  "editor.formatOnSave": false,
  // turn it off for JS and JSX, we will do this via eslint
  "[javascript]": {
    "editor.formatOnSave": false
  },
  "[javascriptreact]": {
    "editor.formatOnSave": false
  },
  // tell the ESLint plugin to run on save
  "eslint.validate": ["html", "javascript", "javascriptreact"],
  // Optional BUT IMPORTANT: If you have the prettier extension enabled for other languages like CSS and HTML, turn it off for JS since we are doing it through Eslint already
  "prettier.disableLanguages": ["javascript", "javascriptreact"],
  "eslint.workingDirectories": [
    {
      "mode": "auto"
    }
  ],
  "editor.codeActionsOnSave": {
    "source.fixAll.eslint": true
  }
}