Question

我想在用户双击鼠标滚轮后执行一些功能。但是当我双击鼠标滚轮时我无法触发事件侦听器，并且这样的代码无法按我预期的那样工作：

https://developer.mozilla.org/en-US/docs/Web/API/Element/dblclick_event

const card = document.querySelector('aside');

card.addEventListener('dblclick', function (e) {
  card.classList.toggle('large');
});

此事件仅在单击主要 bnutton 时触发。我不确定只有在单击左按钮或单击任何按钮时才应触发此事件。谁能给我解释一下？

Answer 1

在这里，您可以使用 MouseEvent.button

MouesEvent 具有以下数字表示：

0: Main button pressed, usually the left button or the un-initialized state
1: Auxiliary button pressed, usually the wheel button or the middle button (if present)
2: Secondary button pressed, usually the right button
3: Fourth button, typically the Browser Back button
4: Fifth button, typically the Browser Forward button

document.getElementById('aside').addEventListener('dblclick', function(e) {
  console.log(e.button);
  e.preventDefault();
});

另一个例子，如果你使用 jQuery。 jQuery 具有 event.which 属性，它与 MouseEvent 一样，分配以下数字表示：

event.which also normalizes button presses (mousedown and mouseupevents), 
reporting 1 for left button, 2 for middle, and 3 for right. 
Use event.which instead of event.button.

$(".aside").live('dblclick', function(e) { 
   if( e.which == 2 ) {
      alert("middle button"); 
   }
});

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>

如何在 JavaScript 上捕获双击鼠标中键（滚轮）事件？

1 个答案: