检测放大Firefox [英] Detect Zoom in Firefox

问题描述

我想检测浏览器是否放大或缩小（不要真正关心的值，但我认为它将需要在决策过程中找到）。我已经阅读了很多关于这个话题的其他SO的帖子，但没有一个解决方案给定工作在FF（虽然有一个IE7 / 8和chrome解决方案）。

哦，我不能使用闪存，所以闪存解决方案是没有问题的。

编辑：我必须能够在初始页面加载时检测到这一点。

解决方案

现代版本的FireFox现在可以执行以下操作：

  DPR = window.devicePixelRatio; 
 if（DPR< = 0.999 || DPR> = 1.001）{
 //用户放大或缩小
} 
  / pre> 
I want to detect if the browser is zoomed in or out (don't really care to know the value, but I assume it will need to be found anyway in the decision process). I have read a lot of other SO posts on the topic, but none of the solutions given work on FF (although there is an IE7/8 and chrome solution). 

Oh, and I can't use flash, so the flash solution is out of the question. 

Edit: And I must be able to detect this on the initial page load
解决方案
With modern versions of FireFox, you can now do the following:
DPR = window.devicePixelRatio;
if ( DPR <= 0.999 || DPR >= 1.001 ){
   // User has zoomed in or zoomed out
}


                        
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