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43 lines
1.3 KiB
Markdown
43 lines
1.3 KiB
Markdown
# @vue/cli-plugin-babel
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> babel plugin for vue-cli
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## Configuration
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Uses Babel 7 + `babel-loader` + [@vue/babel-preset-app](https://github.com/vuejs/vue-cli/tree/dev/packages/%40vue/babel-preset-app) by default, but can be configured via `.babelrc` to use any other Babel presets or plugins.
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By default, `babel-loader` is only applied to files inside `src` and `test` directories. If you wish to explicitly transpile a dependency module, you will need to configure webpack in `vue.config.js`:
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``` js
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module.exports = {
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chainWebpack: config => {
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config
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.rule('js')
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.include
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.add(/module-to-transpile/)
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}
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}
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```
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## Caching
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[cache-loader](https://github.com/webpack-contrib/cache-loader) is enabled by default and cache is stored in `<projectRoot>/node_modules/.cache/cache-loader`.
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## Parallelization
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[thread-loader](https://github.com/webpack-contrib/thread-loader) is enabled by default when the machine has more than 1 CPU cores. This can be turned off by setting `parallel: false` in `vue.config.js`.
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## Installing in an Already Created Project
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``` sh
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npm install -D @vue/cli-plugin-babel
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vue invoke babel
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```
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## Injected webpack-chain Rules
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- `config.rule('js')`
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- `config.rule('js').use('babel-loader')`
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- `config.rule('js').use('cache-loader')`
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- `config.rule('js').use('thread-loader')`
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