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feat: browserslist config file support #9499

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feat: browserslist config file support #9499

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17 changes: 16 additions & 1 deletion packages/babel-preset-app/src/index.js
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Expand Up @@ -56,6 +56,17 @@ function getPolyfills (targets, includes, { ignoreBrowserslistConfig, configPath
))
}

function getTargetsFromBrowserslistRc (browserslistEnv = 'client') {
const { default: getTargets } = require('@babel/helper-compilation-targets')
const targets = getTargets(undefined, { browserslistEnv })

if (Object.keys(targets).length !== 0) {
return targets
} else {
return undefined
}
}

module.exports = (api, options = {}) => {
const presets = []
const plugins = []
Expand All @@ -70,7 +81,7 @@ module.exports = (api, options = {}) => {
useBuiltIns = 'usage',
modules = false,
spec,
ignoreBrowserslistConfig = envName === 'modern',
ignoreBrowserslistConfig,
configPath,
include,
exclude,
Expand All @@ -97,6 +108,10 @@ module.exports = (api, options = {}) => {
modern: { esmodules: true }
}

if (envName !== 'server' && !options.targets) {
options.targets = getTargetsFromBrowserslistRc(envName)
}

const { targets = defaultTargets[envName] } = options

const polyfills = []
Expand Down