Allow setting useBuiltIns to be false.

[zigomir]

Because if you set useBuiltIns to false we'll always fallback to 'usage'.

[LinusBorg]

@zigomir @yyx990803 Where do I set this option? It's not in the schema for vue.config.js as "3rd-party" pluginOptions for babel-preset-app?

That doesn't seem to work...

// vue.config.js
module.exports =  @{
  pluginOptions: {
    'babel-preset-app': {
      useBuiltIns: 'entry',
    },
  },
}

result:

 When setting `useBuiltIns: 'usage'`, polyfills are automatically imported when needed.
  Please remove the `import '@babel/polyfill'` call or use `useBuiltIns: 'entry'` instead.

Edit: I'm stupid, ignore me:

// babelrc
[
  "@vue/app",
  {
    "useBuiltIns": "entry"
  }
]

[zigomir]

👍 I'm using this in .babelrc file yes, and you're not stupid :)