document.activeElement的jQuery替代方案 [英] jQuery alternative for document.activeElement

问题描述

我想要做的是弄清楚用户何时使用INPUT或TEXTAREA元素并将变量标志设置为true ...并在用户不再使用它之后立即将该标志设置为false（即他们点击了INPUT / TEXTAREA元素。

What I wanted to do is figure out whenever the user is engaged with an INPUT or TEXTAREA element and set a variable flag to true... and set that flag to false immediately after the user is no longer engaged with them (ie. they've clicked out of the INPUT/TEXTAREA elements).

我使用jQuery的docuemnt.ready函数将onclick属性添加到我的body元素并将其分配给我的getActive（）函数。

I used jQuery's docuemnt.ready function to add the onclick attribute to my body element and assign it to my getActive() function.

getActive（）函数的代码如下：

The code for the getActive() function is as follows:

function getActive()
{
  activeObj = document.activeElement;
  var inFocus = false;
  if (activeObj.tagName == "INPUT" || activeObj.tagName == "TEXTAREA")
  {
     inFocus = true;
  }
}

我真的很喜欢用jQuery框架保留项目，但是不能似乎找到了一种使用JUST jQuery语法完成相同逻辑的方法。

I'd really like to keep by project withing the jQuery framework, but can't seem to find a way of accomplishing the same logic above using JUST jQuery syntax.

推荐答案

您需要焦点和模糊事件处理程序。例如......

You want the focus and blur event handlers. For example...

var inFocus = false;
$('input, textarea').focus(function() {
  inFocus = true;
});

$('input, textarea').blur(function() {
  inFocus = false;
});

我很确定逗号会让你输入OR textarea，但你明白了没有成功

I'm pretty sure that a comma will get you input OR textarea, but you get the idea if that doesn't pan out

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