rxjs#takeWhile TypeScript Examples

The following examples show how to use rxjs#takeWhile. You can vote up the ones you like or vote down the ones you don't like, and go to the original project or source file by following the links above each example. You may check out the related API usage on the sidebar.
Example #1
Source File: toc-container.directive.ts    From alauda-ui with MIT License 5 votes vote down vote up 
ngAfterContentInit() {
    const actived$ = this._scrollTop$
      .pipe(
        startWith(this.scrollTop),
        debounceTime(200),
        map(scrollTop =>
          this._contents.reduce(
            this.isScrollEnd
              ? this.getMaxContent.bind(this)
              : this.getMinContent(scrollTop),
          ),
        ),
        map(actived => actived.auiTocContent),
      )
      .pipe(
        tap(actived => {
          this._contents.forEach(content => {
            content.active = actived === content.auiTocContent;
          });
          this.cdr.detectChanges();
        }),
      );

    const scrollTween$ = this._scrollTo$.pipe(
      switchMap(name => {
        const target = this._contents.find(
          content => content.auiTocContent === name,
        );

        if (!target) {
          return EMPTY;
        }
        const destination = this.getOffsetTop(target.nativeElement);

        const start = performance.now();
        const source = this.scrollTop;
        const duration = 500;

        return of(0).pipe(
          observeOn(animationFrameScheduler),
          repeat(),
          map(() => (performance.now() - start) / duration),
          takeWhile(t => t < 1),
          endWith(1),
          map(t => t * t * t),
          map(t => source * (1 - t) + destination * t),
        );
      }),
      takeUntil(this._onDestroy$),
    );

    this._subs.push(
      actived$.subscribe(this.activedChange),
      scrollTween$.subscribe(tweenValue => {
        this.scrollTop = tweenValue;
      }),
    );
  }