Vue CLI3 如何支持less的方法示例

npm install less less-loader --save

pm install less less-loader --save

<style lang="less">
#app {
 font-family: 'Avenir', Helvetica, Arial, sans-serif;
 -webkit-font-smoothing: antialiased;
 -moz-osx-font-smoothing: grayscale;
 text-align: center;
 color: #2c3e50;
 margin-: 60px;

 .img {
  border: 1px solid red;
 }
}
</style>

"devDependencies": {
  "less": "^3.0.4",
  "less-loader": "^4.1.0"
}