mirror of https://github.com/nuxt/nuxt.git
38 lines
878 B
JavaScript
38 lines
878 B
JavaScript
// Add polyfill imports to the first file encountered.
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const { addSideEffect } = require('@babel/helper-module-imports')
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const modulePathMap = {
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'regenerator-runtime': 'regenerator-runtime/runtime.js'
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}
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function getModulePath (mod) {
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return modulePathMap[mod] || 'core-js/modules/' + mod + '.js'
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}
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function createImport (path, mod) {
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return addSideEffect(path, getModulePath(mod))
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}
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module.exports = ({ types }) => {
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let entryFile
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return {
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name: 'inject-polyfills',
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visitor: {
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Program (path, state) {
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if (!entryFile) {
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entryFile = state.filename
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} else if (state.filename !== entryFile) {
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return
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}
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const { polyfills } = state.opts
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// Imports are injected in reverse order
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polyfills.slice().reverse().forEach((p) => {
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createImport(path, p)
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})
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}
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}
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}
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}
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