systemjs-plugin-vue

SystemJS plugin for Vue single file components

Usage

This plugin is only tested with jspm 0.17+ and Vue.js 2.0+.

jspm install npm:vue@2.0.0-alpha.5
jspm install --dev npm:systemjs-plugin-vue

System.config({
  "meta": {
    "*.vue": {
      "loader": "systemjs-plugin-vue"
    }
  }
})

You can use this vue-cli template to scaffold an example project.

Features

• ES2015 by default (requires systemsjs-plugin-babel)

• lang="xxx" pre-processors

• Scoped CSS

• PostCSS support

• CSS are automatically extracted across all components and injected as a single <style> tag

Pre-Processors

To enable a pre-processor, you need to install the corresponding pre-processor module via npm, not jspm. Note that if you are using any non-babel pre-processors, then in-browser JIT compilation will not work due to Node dependencies. Use jspm bundle -wid during development, it's faster anyway.

Example:

npm install less --save-dev

<style lang="less">
  /* use less! */
</style> 

These are the preprocessors supported out of the box:

• stylus
• less
• scss (via node-sass, use sass in config section)
• jade
• pug
• coffee-script (use coffee in config section)

Configuring Options

You can add a Vue section in your SystemJS config:

System.config({
  vue: {
    // options
  }
})

Or, alternatively, create a vue.config.js file at the root of your project, and export the configuration object.

Passing Options to Pre-Processors

Just add a nested object under vue:

System.config({
  vue: {
    less: {
      paths: [...] // custom less @import paths
    }
  }
})

Custom Lang Compiler

You can provide custom lang compilers under the compilers option. It is recommended to use vue.config.js for custom compilers, and in most cases you will want to import your Node dependencies as raw Node modules:

// vue.config.js
export default {
  compilers: {
    'my-lang' (raw, filename) {
      return System.import('@node/my-lang').then(myLang => {
        return myLang.compile(raw) // assumes returning a promise
      })
    }
  }
}

PostCSS Configuration

Use vue.postcss in your SystemJS config file. The option can be:

• An array of plugins. Each plugin can either be a string module name or an array with the first element being the module name and the second element being an options object to be passed to that plugin.

  Example:

  System.config({
    vue: {
      postcss: [
        'postcss-nested',
        ['autoprefixer', { browsers: 'last 2 versions' }]
      ]
    }
  })

• An object containing options (passed to postcss.process()) and plugins. The parser and stringifier options can also be string module names and will be resolved automatically.

  Example:

  System.config({
    vue: {
      postcss: {
        options: {
          parser: 'sugarss'
        },
        plugins: [...]
      }
    }
  })

If using vue.config.js, you can also directly provide the imported plugins instead of string module names.

Caveats

• SystemJS' hot reload mechanism is quite limiting and it's currently not possible to support the same level of hot-reload available in vue-loader and vueify.