less引入到Vue处理Css预编译

npm install less less-loader --save

 {
        test: /\.less$/,
        loader: 'style-loader!css-loader!less-loader'
      },

<style scoped lang="less">
@color: #088;
div {
  width: 200px;
  height: 200px;
  background: @color;
  display: flex;
  span {
    font-size: 30px;
    color: #fff;
    margin: auto;
  }
}
</style>