如何停止rxjs计时器

Question

我有以下计时器：

setCountDown() {
        let counter = 5;
        let tick = 1000;
        this.countDown = timer(0, tick)
        .pipe(
          take(counter),
          map(() => --counter),
          finalize(() => {
            if (this.currentQuestionNumber < this.questionsToAsk)
              this.showNextQuestion();
            else {
              this.endQuiz();
            }

          })
        );
      }

如何停止计时器？例如。当用户点击按钮时...

Answer 1

假设您使用的是angular，如果仅使用javascript，就可以fromEvent()来创建userClick

userClick=new Subject()

click(){userClick.next()}

setCountDown() {
        let counter = 5;
        let tick = 1000;
        this.countDown = timer(0, tick)
        .pipe(
          take(counter),
          map(() => --counter),
          takeUntil(userClick),
          finalize(() => {
            if (this.currentQuestionNumber < this.questionsToAsk)
              this.showNextQuestion();
            else {
              this.endQuiz();
            }

          })
        );
      }