ngx-bootstrap手风琴动态打开面板

时间:2017-09-08 14:23:42

标签: javascript angular ngx-bootstrap bootstrap-accordion

我使用ngx-bootstrap手风琴来显示博客文章列表。

以下是模板:

<accordion id="blog-list">
    <accordion-group *ngFor="let post of posts; let first = first;" [isOpen]="first" id="post-{{post.id}}">
        <!-- Here goes content irrelevant to the question -->
    </accordion-group>
</accordion>

我也使用一些全局配置,一次只有一个开放的手风琴面板。

export function getAccordionConfig(): AccordionConfig {
  return Object.assign(new AccordionConfig(), { closeOthers: true });
}

现在,当帖子更新时,我会在列表中更新它,如下所示:

constructor(private elementRef: ElementRef, private postService: PostService) {
    this.postService.updatedPost.subscribe(val => {
      let i = this.posts.findIndex(post => post.id === val.id);
      this.posts[i] = val;
      let element = elementRef.nativeElement.querySelector('#post-' + val.id);
      element.setAttribute('isOpen', true); // <- this does not work
      element.scrollIntoView(true);
    });
  }

更新和滚动工作正常,但我无法弄清楚如何让面板打开。视图更新并滚动后,所有面板都关闭。我希望带有更新帖子的面板打开。

1 个答案:

答案 0 :(得分:1)

问题出在[isOpen]="first",默认情况下会打开第一篇文章 使用DOM直接操作不会触发绑定更新

你能做的是:

[isOpen]="activPostIndex === index"

activPostIndex = 0;
constructor(private elementRef: ElementRef, private postService: PostService) {
    this.postService.updatedPost.subscribe(val => {
      this.activPostIndex = this.posts.findIndex(post => post.id === val.id);
      this.posts[i] = val;
    });
  }
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