Cannot use import statement outside a module

参考资料：https://www.jianshu.com/p/60a8a74f5eee?ivk_sa=1024320u

 使用 vs code 调试js 代码，出现如上报错

解决过程：

1. npm init -y
2. 在 package.json 中添加字段 type

3. package.json
   {
     "name": "promise",
     "version": "1.0.0",
     "description": "",
     "main": "index.js",
     "type": "module",
     "scripts": {
       "test": "echo \"Error: no test specified\" && exit 1"
     },
     "keywords": [],
     "author": "",
     "license": "ISC"
   }