quasar

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const { addSideEffect } = require('@babel/helper-module-imports')
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// slightly modified from @babel/preset-env/src/utils
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// use an absolute path for core-js modules, to fix conflicts of different core-js versions
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// TODO: remove the `useAbsolutePath` option in v5,
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// because `core-js` is sure to be present in newer projects;
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// we only need absolute path for babel runtime helpers, not for polyfills
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function getModulePath (mod, useAbsolutePath) {
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  const modPath =
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    mod === 'regenerator-runtime'
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      ? 'regenerator-runtime/runtime'
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      : `core-js/modules/${mod}`
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  return useAbsolutePath ? require.resolve(modPath) : modPath
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}
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// add polyfill imports to the first file encountered.
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module.exports = ({}, { polyfills, useAbsolutePath }) => {
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  return {
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    name: 'quasar-cli-inject-polyfills',
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    visitor: {
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      Program (path) {
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        // imports are injected in reverse order
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        polyfills
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          .slice()
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          .reverse()
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          .forEach(mod => {
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            // create import
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            addSideEffect(path, getModulePath(mod, useAbsolutePath))
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          })
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      }
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    }
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  }
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}
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