my.offWatchShake

// Stop watching for shakes
my.offWatchShake();

Page({
  data: {
    shakeEnabled: false
  },

  toggleShake() {
    if (this.data.shakeEnabled) {
      my.offWatchShake();
      this.setData({ shakeEnabled: false });
    } else {
      this.enableShake();
      this.setData({ shakeEnabled: true });
    }
  },

  enableShake() {
    my.watchShake({
      success: () => {
        this.handleShake();
        if (this.data.shakeEnabled) {
          this.enableShake();
        }
      }
    });
  },

  handleShake() {
    my.vibrate();
    console.log('Shake detected!');
  }
});

Page({
  onShow() {
    this.startShakeWatch();
  },

  onHide() {
    // Stop watching when page is hidden
    my.offWatchShake();
  },

  startShakeWatch() {
    my.watchShake({
      success: () => {
        this.onShake();
        this.startShakeWatch();
      }
    });
  },

  onShake() {
    // Handle shake event
  }
});