我如何在控制檯中記錄訂閱內的結果？

Question

在我的角應用程序中，我打電話給一個服務並獲取數據，一旦結果被提取，我需要添加一個控制檯日誌。我可以在哪裏添加控制檯日誌？

this.searchTerm.asObservable() 
      .debounceTime(300)  
      .distinctUntilChanged() 
      .switchMap(term => this.doFind(term)) 
      .subscribe(data => this.results = data 
      , error => { 
       this.errorMessage = error; 
      }); 

Answer 1

使用一個代碼塊

this.searchTerm.asObservable() 
     .debounceTime(300)  
     .distinctUntilChanged() 
     .switchMap(term => this.doFind(term)) 
     .subscribe(data => { 
      this.results = data; 
      console.log('data', data); 
     }) 
     , error => { 
      this.errorMessage = error; 
     }); 

或do操作

this.searchTerm.asObservable() 
     .debounceTime(300)  
     .distinctUntilChanged() 
     .switchMap(term => this.doFind(term)) 
     .do(val => condole.log(val)) 
     .subscribe(data => this.results = data 
     , error => { 
      this.errorMessage = error; 
     }); 

Answer 2

您正在使用箭頭功能的簡寫版，用更大的版本:)

.subscribe((data) => { 
    this.results = data; 
    console.log(data); 
}, error => { 
    this.errorMessage = error; 
}); 

Answer 3

你可以這樣做

this.searchTerm.asObservable() 
     .debounceTime(300)  
     .distinctUntilChanged() 
     .switchMap(term => this.doFind(term)) 
     .subscribe(
      data=>this.message=data.msg, 
      error=>alert('errer'), 
      ()=>{console.log('finished');} 

      );