element.changedTouches [0]錯誤未定義。 Chrome bug？

Question

我想在Chrome中製作一個幻燈片效果，但是當我滑動時我總是收到一個錯誤。這是我的代碼：

$(function() { 
     $('.table.table-responsive.table-condensed tbody tr').on('touchstart', function (e) { 
      touchsurface.innerHTML = '' 
      var touchobj = e.changedTouches[0] 
      dist = 0 
      startX = touchobj.pageX 
      startY = touchobj.pageY 
      startTime = new Date().getTime() // record time when finger first makes contact with surface 
      e.preventDefault(); 
     }); 
    }, false) 

這是我得到的錯誤：Uncaught TypeError：無法讀取未定義的屬性'0'。這是在線：var touchobj = e.changedTouches [0]

Answer 1

jQuery事件對象沒有changedTouches屬性。

The following properties are also copied to the event object, though some of their values may be undefined depending on the event:

altKey, bubbles, button, buttons, cancelable, char, charCode, clientX, clientY, ctrlKey, currentTarget, data, detail, eventPhase, key, keyCode, metaKey, offsetX, offsetY, originalTarget, pageX, pageY, relatedTarget, screenX, screenY, shiftKey, target, toElement, view, which

https://api.jquery.com/category/events/event-object/

使用

e.originalEvent.changedTouches[0]