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Disable usage of esmodules when commonjs is enabled on the preset

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Tim Neutkens 2018-12-04 20:10:05 +01:00
parent 29ed67b020
commit 2d5b56a181
1 changed files with 8 additions and 7 deletions
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15
packages/next/build/babel/preset.ts
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@ -48,14 +48,15 @@ type BabelPreset = {
} }
module.exports = (context: any, options: NextBabelPresetOptions = {}): BabelPreset => { module.exports = (context: any, options: NextBabelPresetOptions = {}): BabelPreset => {
const presetEnvConfig = {
// In the test environment `modules` is often needed to be set to true, babel figures that out by itself using the `'auto'` option
// In production/development this option is set to `false` so that webpack can handle import/export with tree-shaking
modules: isDevelopment || isProduction ? false : 'auto',
...options['preset-env']
}
return { return {
presets: [ presets: [
[require('@babel/preset-env').default, { [require('@babel/preset-env').default, presetEnvConfig],
// In the test environment `modules` is often needed to be set to true, babel figures that out by itself using the `'auto'` option
// In production/development this option is set to `false` so that webpack can handle import/export with tree-shaking
modules: isDevelopment || isProduction ? false : 'auto',
...options['preset-env']
}],
[require('@babel/preset-react'), { [require('@babel/preset-react'), {
// This adds @babel/plugin-transform-react-jsx-source and // This adds @babel/plugin-transform-react-jsx-source and
// @babel/plugin-transform-react-jsx-self automatically in development // @babel/plugin-transform-react-jsx-self automatically in development
@ -74,7 +75,7 @@ module.exports = (context: any, options: NextBabelPresetOptions = {}): BabelPres
corejs: 2, corejs: 2,
helpers: true, helpers: true,
regenerator: true, regenerator: true,
useESModules: !isTest, useESModules: !isTest && presetEnvConfig.modules !== 'commonjs',
...options['transform-runtime'] ...options['transform-runtime']
}], }],
[require('styled-jsx/babel'), styledJsxOptions(options['styled-jsx'])], [require('styled-jsx/babel'), styledJsxOptions(options['styled-jsx'])],