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babel.config.js
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babel.config.js
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const process = require('process')
const pkg = require('./package.json')
module.exports = function (api, ...args) {
api.cache(true)
if (!process.env.BUILD_VERSION) {
process.env.BUILD_VERSION = process.env.VERSION_OVERRIDE || pkg.version
}
if (!process.env.BUILD_ENV) {
process.env.BUILD_ENV = 'CDN'
}
process.env.RRWEB_VERSION = pkg.dependencies.rrweb
const ignore = [
'**/*.test.js',
'**/*.component-test.js',
'**/__mocks__/*.js'
]
const presets = [
'@babel/preset-env'
]
const plugins = [
// Replaces template literals with concatenated strings. Some customers enclose snippet in backticks when
// assigning to a variable, which conflicts with template literals.
'@babel/plugin-transform-template-literals',
// Replaces `process.env.*` environment variables with actual values.
[
'transform-inline-environment-variables',
{
include: ['BUILD_VERSION', 'BUILD_ENV', 'RRWEB_VERSION']
}
]
]
const env = {
test: {
presets: [
[
'@babel/preset-env',
{
modules: 'commonjs'
}
]
]
},
webpack: {
ignore,
plugins: [
[
'./tools/babel/plugins/transform-import',
{
'(constants/)env$': '$1env.cdn'
}
]
]
},
'webpack-ie11': {
ignore,
assumptions: {
iterableIsArray: false
},
presets: [
[
'@babel/preset-env', {
useBuiltIns: 'entry',
corejs: { version: 3.23, proposals: true },
loose: true,
targets: {
browsers: [
'ie >= 11' // Does not affect webpack's own runtime output; see `target` webpack config property.
]
}
}
]
],
plugins: [
[
'./tools/babel/plugins/transform-import',
{
'(constants/)env$': '$1env.cdn',
'polyfill-detection$': 'polyfill-detection.es5'
}
]
]
},
'npm-cjs': {
ignore,
presets: [
[
'@babel/preset-env', {
modules: 'commonjs'
}
]
],
plugins: [
[
'./tools/babel/plugins/transform-import',
{
'(/constants/|^\\./)env$': '$1env.npm',
'(/configure/|^\\./)public-path$': '$1public-path.npm',
'(/configure/|^\\./)nonce$': '$1nonce.npm'
}
]
]
},
'npm-esm': {
ignore,
presets: [
[
'@babel/preset-env', {
modules: false
}
]
],
plugins: [
[
'./tools/babel/plugins/transform-import',
{
'(/constants/|^\\./)env$': '$1env.npm',
'(/configure/|^\\./)public-path$': '$1public-path.npm',
'(/configure/|^\\./)nonce$': '$1nonce.npm'
}
]
]
}
}
return {
presets,
plugins,
env
}
}