Vue中自动化引入样式及组件样式穿透

npm i -D style-resources-loader  

// vue.config.js

const path = require('path')

function addStyleResource (rule) {
  rule.use('style-resource')
    .loader('style-resources-loader')
    .options({
      patterns: [
        path.resolve(__dirname, './src/styles/variable.less'),
      ],
    })
}

module.exports = {
  chainWebpack: config => {
    // 自动化导入css文件
    const types = ['vue-modules', 'vue', 'normal-modules', 'normal']
    types.forEach(type => addStyleResource(config.module.rule('less').oneOf(type)))
}

<style scoped>
#app >>> p{ ... }
</style>

<style scoped>
#app /deep/ p{ ... }
#app::v-deep p{ ... }
#app {
    /deep/ a{ ... }
    ::v-deep a{ ... }
}
</style>