/
next-babel-loader.js
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/
next-babel-loader.js
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import { join } from 'path'
import * as Log from '../../output/log'
import babelLoader from './babel-loader/src/index'
// increment 'o' to invalidate cache
// eslint-disable-next-line no-useless-concat
const cacheKey = 'babel-cache-' + 'o' + '-'
const nextBabelPreset = require('../../babel/preset')
const customBabelLoader = babelLoader((babel) => {
const presetItem = babel.createConfigItem(nextBabelPreset, {
type: 'preset',
})
const applyCommonJs = babel.createConfigItem(
require('../../babel/plugins/commonjs'),
{ type: 'plugin' }
)
const commonJsItem = babel.createConfigItem(
require('next/dist/compiled/babel/plugin-transform-modules-commonjs'),
{ type: 'plugin' }
)
const configs = new Set()
return {
customOptions(opts) {
const custom = {
isServer: opts.isServer,
pagesDir: opts.pagesDir,
babelPresetPlugins: opts.babelPresetPlugins,
development: opts.development,
hasReactRefresh: opts.hasReactRefresh,
hasJsxRuntime: opts.hasJsxRuntime,
}
const filename = join(opts.cwd, 'noop.js')
const loader = Object.assign(
opts.cache
? {
cacheDirectory: join(opts.distDir, 'cache', 'next-babel-loader'),
cacheIdentifier:
cacheKey +
(opts.isServer ? '-server' : '') +
'-new-polyfills' +
(opts.development ? '-development' : '-production') +
(opts.hasReactRefresh ? '-react-refresh' : '') +
(opts.hasJsxRuntime ? '-jsx-runtime' : '') +
JSON.stringify(
babel.loadPartialConfig({
filename,
cwd: opts.cwd,
sourceFileName: filename,
}).options
),
}
: {
cacheDirectory: false,
},
opts
)
delete loader.isServer
delete loader.cache
delete loader.distDir
delete loader.pagesDir
delete loader.babelPresetPlugins
delete loader.development
delete loader.hasReactRefresh
delete loader.hasJsxRuntime
return { loader, custom }
},
config(
cfg,
{
source,
customOptions: {
isServer,
pagesDir,
babelPresetPlugins,
development,
hasReactRefresh,
hasJsxRuntime,
},
}
) {
const filename = this.resourcePath
const options = Object.assign({}, cfg.options)
const isPageFile = filename.startsWith(pagesDir)
if (cfg.hasFilesystemConfig()) {
for (const file of [cfg.babelrc, cfg.config]) {
// We only log for client compilation otherwise there will be double output
if (file && !isServer && !configs.has(file)) {
configs.add(file)
Log.info(`Using external babel configuration from ${file}`)
}
}
} else {
// Add our default preset if the no "babelrc" found.
options.presets = [...options.presets, presetItem]
}
options.caller.isServer = isServer
options.caller.isDev = development
options.caller.hasJsxRuntime = hasJsxRuntime
const emitWarning = this.emitWarning.bind(this)
Object.defineProperty(options.caller, 'onWarning', {
enumerable: false,
writable: false,
value: (options.caller.onWarning = function (reason) {
if (!(reason instanceof Error)) {
reason = new Error(reason)
}
emitWarning(reason)
}),
})
options.plugins = options.plugins || []
if (hasReactRefresh) {
const reactRefreshPlugin = babel.createConfigItem(
[require('react-refresh/babel'), { skipEnvCheck: true }],
{ type: 'plugin' }
)
options.plugins.unshift(reactRefreshPlugin)
if (!isServer) {
const noAnonymousDefaultExportPlugin = babel.createConfigItem(
[require('../../babel/plugins/no-anonymous-default-export'), {}],
{ type: 'plugin' }
)
options.plugins.unshift(noAnonymousDefaultExportPlugin)
}
}
if (!isServer && isPageFile) {
const pageConfigPlugin = babel.createConfigItem(
[require('../../babel/plugins/next-page-config')],
{ type: 'plugin' }
)
options.plugins.push(pageConfigPlugin)
const diallowExportAll = babel.createConfigItem(
[
require('../../babel/plugins/next-page-disallow-re-export-all-exports'),
],
{ type: 'plugin' }
)
options.plugins.push(diallowExportAll)
}
// If the file has `module.exports` we have to transpile commonjs because Babel adds `import` statements
// That break webpack, since webpack doesn't support combining commonjs and esmodules
if (source.indexOf('module.exports') !== -1) {
options.plugins.push(applyCommonJs)
}
options.plugins.push([
require.resolve('next/dist/compiled/babel/plugin-transform-define'),
{
'process.env.NODE_ENV': development ? 'development' : 'production',
'typeof window': isServer ? 'undefined' : 'object',
'process.browser': isServer ? false : true,
},
'next-js-transform-define-instance',
])
if (isPageFile) {
if (!isServer) {
options.plugins.push([
require.resolve('../../babel/plugins/next-ssg-transform'),
{},
])
}
}
// As next-server/lib has stateful modules we have to transpile commonjs
options.overrides = [
...(options.overrides || []),
{
test: [
/next[\\/]dist[\\/]next-server[\\/]lib/,
/next[\\/]dist[\\/]client/,
/next[\\/]dist[\\/]pages/,
],
plugins: [commonJsItem],
},
]
for (const plugin of babelPresetPlugins) {
require(join(plugin.dir, 'src', 'babel-preset-build.js'))(
options,
plugin.config || {}
)
}
return options
},
}
})
export default customBabelLoader