Nuxt/packages/babel-preset-app/src/polyfills-plugin.js

25 lines
611 B
JavaScript

// Add polyfill imports to the first file encountered.
module.exports = ({ types }) => {
let entryFile
return {
name: 'inject-polyfills',
visitor: {
Program(path, state) {
if (!entryFile) {
entryFile = state.filename
} else if (state.filename !== entryFile) {
return
}
const { polyfills } = state.opts
const { createImport } = require('@babel/preset-env/lib/utils')
// Imports are injected in reverse order
polyfills.slice().reverse().forEach((p) => {
createImport(path, p)
})
}
}
}
}