浏览器缩放检测的js代码
测试代码
http://jsbin.com/dipijeqi/11
效果：
chrome
window.devicePixelRatio:2 (准确) screen.deviceXDPI/screen.logicalXDPI:NaN window.outerWidth/window.innerWidth:2 document.documentElement.offsetHeight/window.innerHeight:0.020618556701030927(有相关性) window.top.outerWidth/window.top.innerWidth:2
ff
window.devicePixelRatio:1.5(准确) screen.deviceXDPI/screen.logicalXDPI:NaN window.outerWidth/window.innerWidth:1.0114583333333333 document.documentElement.offsetHeight/window.innerHeight:0.023391812865497075 (有相关性) window.top.outerWidth/window.top.innerWidth:1.0114583333333333
ie8
window.devicePixelRatio:undefined screen.deviceXDPI/screen.logicalXDPI:1.5416666666666667(大致准确) window.outerWidth/window.innerWidth:NaN document.documentElement.offsetHeight/window.innerHeight:NaN window.top.outerWidth/window.top.innerWidth:NaN
ie11
window.devicePixelRatio:1.5(准确) screen.deviceXDPI/screen.logicalXDPI:1.5 window.outerWidth/window.innerWidth:1.0084033613445377 document.documentElement.offsetHeight/window.innerHeight:0.02203856749311295(有相关性) window.top.outerWidth/window.top.innerWidth:1.0084033613445377
ie10
window.devicePixelRatio:undefined screen.deviceXDPI/screen.logicalXDPI:1.5(准确) window.outerWidth/window.innerWidth:1.0084033613445377 document.documentElement.offsetHeight/window.innerHeight:1 window.top.outerWidth/window.top.innerWidth:1.0084033613445377
ie9
window.devicePixelRatio:undefined screen.deviceXDPI/screen.logicalXDPI:1.5(准确) window.outerWidth/window.innerWidth:1.0084033613445377 document.documentElement.offsetHeight/window.innerHeight:1 window.top.outerWidth/window.top.innerWidth:1.0084033613445377
3606.3(完全没反应)
window.devicePixelRatio:undefined screen.deviceXDPI/screen.logicalXDPI:1 window.outerWidth/window.innerWidth:NaN document.documentElement.offsetHeight/window.innerHeight:NaN window.top.outerWidth/window.top.innerWidth:NaN
360极速浏览器
window.devicePixelRatio:1 screen.deviceXDPI/screen.logicalXDPI:NaN window.outerWidth/window.innerWidth:1.5 document.documentElement.offsetHeight/window.innerHeight:0.015267175572519083 window.top.outerWidth/window.top.innerWidth:1.5(准确)
搜狗高速浏览器(完全没反应)
window.devicePixelRatio:undefined screen.deviceXDPI/screen.logicalXDPI:1 window.outerWidth/window.innerWidth:NaN document.documentElement.offsetHeight/window.innerHeight:NaN window.top.outerWidth/window.top.innerWidth:NaN
淘宝浏览器
window.devicePixelRatio:1 screen.deviceXDPI/screen.logicalXDPI:NaN window.outerWidth/window.innerWidth:2.0710059171597632 (大致准确) document.documentElement.offsetHeight/window.innerHeight:0.022988505747126436 window.top.outerWidth/window.top.innerWidth:2.0710059171597632