message: [bugfix] Popup: should remove touch event listener when distroyed
diff: @@ -88,10 +88,10 @@ export default {
  this.renderOverlay();
  if (this.lockScroll) {
  - if (!context.lockCount) {
  - document.body.classList.add('van-overflow-hidden');
  on(document, 'touchstart', this.touchStart);
  on(document, 'touchmove', this.onTouchMove);
  + if (!context.lockCount) {
  + document.body.classList.add('van-overflow-hidden');
  }
  context.lockCount++;
  }
  @@ -104,10 +104,10 @@ export default {
  if (this.lockScroll) {
  context.lockCount--;
  - if (!context.lockCount) {
  - document.body.classList.remove('van-overflow-hidden');
  off(document, 'touchstart', this.touchStart);
  off(document, 'touchmove', this.onTouchMove);
  + if (!context.lockCount) {
  + document.body.classList.remove('van-overflow-hidden');
  }
  }
  