angular2 Cannot resolve all parameters for 'Parser'(?).

Question

刚搭建一个angular2的框架，angular版本2.4.0，webpack打包完浏览器console报错：
bundle.min.js:39162 Uncaught Error: Cannot resolve all parameters for 'Parser'(?). Make sure that all the parameters are decorated with Inject or have valid type annotations and that 'Parser' is decorated with Injectable.
但是angular版本改为2.0的就不会报错，代码也是最简单的官网上的demo，以下是tsconfig.json配置

{
  "compilerOptions": {
    "target": "es5",
    "module": "commonjs",
    "moduleResolution": "node",
    "sourceMap": true,
    "emitDecoratorMetadata": true,
    "experimentalDecorators": true,
    "removeComments": false,
    "noImplicitAny": false
  },
  "exclude": [
    "node_modules",
    "typings/main",
    "typings/main.d.ts"
  ],
  "compileOnSave": false,
  "buildOnSave": false
}

是ts配置出错还是什么原因呢，求解

Answer 1

从你的报错看应该是DI出了问题，可以试试把你的target改为：

"target": "es6"

不行的话就试试在你的服务里显示地引入操作符：

import {Inject} from '@angular/core';
//...
constructor(@Inject(SomeService) someService: SomeService);

希望你能顺利解决 :)