如何在不接受焦点的元素上获取键盘事件?

How to grab keyboard events on an element which doesn#39;t accept focus?(如何在不接受焦点的元素上获取键盘事件?)

问题描述

我知道要处理输入字段中的键盘事件，您可以使用:

I know that for handling keyboard events in an input field you can use:

$('input').keyup(function(e){
var code = e.keyCode // and 13 is the keyCode for Enter
});

但是，现在，我有一些 div 和 li 元素，我没有 form 元素，我的也没有元素被认为是表单元素，它们都不接受 focus 或 tab 之类的东西.

But, now, I have some div and li elements, and I don't have a form element, and none of my elements are considered to be form elements and none of them accept focus or tab and stuff like that.

但现在我需要处理 div 元素中的 keyup(或 keydown 或 keypress 无关紧要)事件.我试过了:

But now I need to handle the keyup (or keydown, or keypress, doesn't matter) event in a div element. I tried:

$('div#modal').keyup(function(e){
   if (e.keyCode == 13)
   {
      $('#next').click(); // Mimicking mouse click to go to the next level.
   }
});

但问题是，它不起作用.我该怎么办?

But the problem is, it doesn't work. What should I do?

推荐答案

一个div默认无法获得焦点.但是，您可以通过将 tabindex 属性添加到 div 来更改它:

A div by default cannot be given focus. However, you can change that by adding a tabindex attribute to the div:

<div tabindex="0" id="example"></div>

然后你可以给 div 焦点，也可以用 hover 事件来模糊它:

You can then give the div focus, and also blur it with the hover event:

$("#example").hover(function() {
    this.focus();
}, function() {
    this.blur();
}).keydown(function(e) {
    alert(e.keyCode);
});

当 div 有焦点时，它将接受键盘事件.您可以在此处查看此工作的示例.

When the div has focus, it will accept keyboard events. You can see an example of this working here.

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