我有两个观测值Observable.of(0, animationFrame)
和Observable.fromEvent(window, 'scroll')
。我想将它们组合在一起,以便仅在animationFrame的刻度上调用renderScrollBar(event)
。
Observable.fromEvent(window, 'scroll')
.map((event: any) => event.currentTarget)
.subscribe((event) => {
this._renderScrollBar(event);
});
let x = 0;
Observable.of(0, animationFrame)
.repeat()
.takeUntil(Observable.timer(1000))
.subscribe(() => console.log(x++));
}
最佳答案
如果要将节流滚动事件限制到requestAnimationFrame,则可以使用throttleTime(0, animationFrame)
运算符代替Observable.of(0, animationFrame)
。
例
Observable.fromEvent(window, 'scroll')
.throttleTime(0, animationFrame)