如何找出文档中最高的z-index？ [英] How can you figure out the highest z-index in your document?

问题描述

为了将包含透明文本图像的div设置为文档中的最高z-index，我选择了10,000，它解决了我的问题。

以前我已经猜到了数字3，但它没有效果。

因此，有一个更科学的方法，弄清楚什么z指数高于所有

我尝试在Firebug中找到这个指标，但找不到它。 >解决方案

您可以为特定元素类型（如DIV）调用 findHighestZIndex ，如下所示：

  findHighestZIndex（'div'）;假设 findHighestZindex 函数定义的函数，
  

this：

  function findHighestZIndex（elem）
 {
 var elems = document.getElementsByTagName（elem）; 
 var highest = 0; 
 for（var i = 0; i< elems.length; i ++）
 {
 var zindex = document.defaultView.getComputedStyle（elems [i]，null）.getPropertyValue -指数）; 
 if（（zindex> highest）&&（zindex！='auto'））
 {
 highest = zindex; 
} 
} 
 return highest; 
} 
  

In order to set a div containing a transparent text image as the highest z-index in my document, I picked the number 10,000 and it solved my problem.

Previously I had guessed with the number 3 but it had no effect.

So, is there a more scientific way of figuring out what z-index is higher than that of all of your other elements?

I tried looking for this metric in Firebug but couldn't find it.

解决方案

You could call findHighestZIndex for a particular element type such as a 'DIV' like this:

findHighestZIndex('div');

assuming a findHighestZindex function that is defined like this:

function findHighestZIndex(elem)
{
  var elems = document.getElementsByTagName(elem);
  var highest = 0;
  for (var i = 0; i < elems.length; i++)
  {
    var zindex=document.defaultView.getComputedStyle(elems[i],null).getPropertyValue("z-index");
    if ((zindex > highest) && (zindex != 'auto'))
    {
      highest = zindex;
    }
  }
  return highest;
}

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