Property 'map' does not exist on type 'Observable'报错解决方案

开发项目时Property ‘map’ does not exist on type 'Observable’报错

constructor(private http: Http) {
this.dataSource = this.http.get('/list')
.map((res) => res.json());
}

分析之后发现是缺少模块，安装此模块即可解决。

npm install rxjs-compat