根据angular 8中的某个条件过滤来自httpClient的响应数据

Question

我是 Angular（V8）的新手。我正在发出发布请求，并希望根据条件过滤响应数据。当我尝试时，出现以下错误，过滤器不是函数。能否请您指导，以便对我有所帮助。Sample Response = {className:"a",dept_name:"b",jsonData:[{"type":"branch","value":"1"},{"type":"branch","value":"1"},{"type":"dev","value":"2"},{"type":"dev","value":"2"},{"type":"dev","value":"2"},{"type":"branch","value":"1"}]} 我想过滤 jsonData 其中 type="dev"。this.http.post('someurl')  .map(item => this.filterVal = item)  .filter(item => item.type=== "dev")   .subscribe(data => {    this.posts = data;  })Expected Output :jsonData:[{"type":"dev","value":"2"},{"type":"dev","value":"2"},{"type":"dev","value":"2"}]

Answer 1

Response.jsonData.filter(x => {x.type === "dev"})