在angular 6中使用 less 的实例代码

{
 "$schema": "./node_modules/@angular/cli/lib/config/schema.json",
 "version": 1,
 "newProjectRoot": "projects",
 "projects": {
  "ngTest": {
   "root": "",
   "sourceRoot": "src",
   "projectType": "application",
   "prefix": "app",
   "schematics": {
    "@schematics/angular:component": {
     "styleext": "less"
    }
   }
 ......
}