小程序 倒计时

// countdown.js
Component({
  properties: {
    endTime: {
      type: Number,
      value: 0
    }
  },
  data: {
    remainingTime: 0
  },
  attached() {
    this.startCountdown();
  },
  methods: {
    startCountdown() {
      const interval = setInterval(() => {
        const now = Date.now();
        const remaining = this.properties.endTime - now;
        if (remaining <= 0) {
          clearInterval(interval);
          this.setData({ remainingTime: 0 });
          this.triggerEvent('countdownend');
        } else {
          this.setData({ remainingTime: remaining });
        }
      }, 1000);
    }
  }
});

<!-- countdown.wxml -->
<view>{{remainingTime}}</view>