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41 lines
1.4 KiB
41 lines
1.4 KiB
3 years ago
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# @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 `babel.config.js` to use any other Babel presets or plugins.
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By default, `babel-loader` excludes files inside `node_modules` dependencies. If you wish to explicitly transpile a dependency module, you will need to add it to the `transpileDependencies` option in `vue.config.js`:
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``` js
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module.exports = {
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transpileDependencies: [
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// can be string or regex
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'my-dep',
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/other-dep/
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]
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}
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```
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## Caching
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Cache options of [babel-loader](https://github.com/babel/babel-loader#options) is enabled by default and cache is stored in `<projectRoot>/node_modules/.cache/babel-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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`parallel` should be set to `false` when using Babel in combination with non-serializable loader options, such as regexes, dates and functions. These options would not be passed correctly to `babel-loader` which may lead to unexpected errors.
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## Installing in an Already Created Project
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```bash
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vue add 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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