部分 DOM 在 Angular 5 中不断刷新.尝试从 YouTube API 获取视频时 [英] Part of the DOM continuously getting refreshed in Angular 5. While trying to fetch videos from YouTube API

问题描述

在

中调用Youtube API

ngOnInit(){var finalURL = "https://www.googleapis.com/youtube/v3/search?key="+this.api+"&channelId="+this.chanId+"&part=snippet,id&order=date&maxResults="+this.result+""控制台日志(finalURL)；this.obser$ = this.http.get(finalURL).subscribe(response=>{控制台日志(响应)；让 ytresults= response.json();控制台日志(ytresults)；ytresults.items.forEach(obj => {控制台日志(obj.id.videoId)；this.ytvideolist.push(obj.id.videoId);});console.log(this.ytvideolist);}

尝试在这里对视频网址进行消毒

<iframe [src]="getEmbedUrl(id)" frameborder="0" allowfullscreen></iframe>

在函数 getEmbedUrl(id) 中使用 DOM sanitizer

 getEmbedUrl(id){控制台日志(ID)；return this.sanitizer.bypassSecurityTrustResourceUrl('https://youtube.com/embed/'+id);}

一切正常，视频正在获取，但部分 DOM 不断刷新.我尝试取消订阅所有组件生命周期挂钩.但是如果我取消订阅，我将不会只获取任何结果.有没有其他解决方法，或者我在这里遗漏了什么！

解决方案

解决了使用管道的问题

import { Pipe, PipeTransform } from '@angular/core';从@angular/platform-b​​rowser"导入 {DomSanitizer, SafeResourceUrl}；@管道({名称:'youtubeSafeUrl'})导出类 YoutubePipe 实现 PipeTransform {构造函数(私有消毒剂:DomSanitizer){}变换(视频ID:字符串):SafeResourceUrl {返回 this.sanitizer.bypassSecurityTrustResourceUrl(`https://www.youtube.com/embed/${videoId}`);}}

在html里面做了这样的事情

<iframe [src]="videoId | youtubeSafeUrl" frameborder="0" allowfullscreen></iframe>

我在猜测订阅有问题.无论如何它解决了！我希望它可以帮助某人.

Calling Youtube API in

ngOnInit(){

var finalURL = "https://www.googleapis.com/youtube/v3/search?key="+this.api+"&channelId="+this.chanId+"&part=snippet,id&order=date&maxResults="+this.result+""
console.log(finalURL);

 this.obser$ = this.http.get(finalURL).subscribe(response=>{

  console.log(response);

  let ytresults= response.json();
  console.log(ytresults);

   ytresults.items.forEach(obj => {
       console.log(obj.id.videoId);
       this.ytvideolist.push(obj.id.videoId);

    });
  console.log(this.ytvideolist); 
} 

trying here to make the video url sanitized

<li *ngFor= "let id of ytvideolist">
  <iframe [src]="getEmbedUrl(id)" frameborder="0" allowfullscreen></iframe>
</li>

Using DOM sanitizer in the function getEmbedUrl(id)

 getEmbedUrl(id){
      console.log(id);
    return this.sanitizer.bypassSecurityTrustResourceUrl('https://youtube.com/embed/'+id);
   }

Everything is working fine videos are getting fetched but part of the DOM continuously getting refreshed. I tried to do unsubscribe at all the component lifecycle hooks. But If I unsubscribe I won't fetch any results only. Is there any other work-around or am I missing some thing here!

解决方案

Solved the problem using pipe

import { Pipe, PipeTransform } from '@angular/core';
import {DomSanitizer, SafeResourceUrl} from "@angular/platform-browser";

@Pipe({
  name: 'youtubeSafeUrl'
})
export class YoutubePipe implements PipeTransform {

  constructor(private sanitizer: DomSanitizer){

  }

  transform(videoId: string): SafeResourceUrl {
    return this.sanitizer.bypassSecurityTrustResourceUrl(
      `https://www.youtube.com/embed/${videoId}`);
  }

}

Inside html did something like this

<div *ngFor= "let videoId of ytvideolist" class="shadow1">
                        <iframe [src]="videoId | youtubeSafeUrl" frameborder="0" allowfullscreen></iframe>
                </div>  

I was guessing problem with subscription. anyhow it resolved! I hope it helps somebody.

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