JavaScript获取样式

问题描述

是否可以使用JavaScript获取对象的所有样式？像：

Is it possible to get ALL of the styles for an object using JavaScript? Something like:

main.css
-------
#myLayer {
  position: absolute;
  width: 200px;
  height: 100px;
  color: #0000ff;
}

main.js
-------
var ob = document.getElementById("myLayer");
var pos = ob.(getPosition);
// Pos should equal "absolute" but
// ob.style.position would equal null
// any way to get absolute?

推荐答案

关于所谓的计算方式，请查看有关如何获取这些文章：

You are talking about what is known as Computed Style, check out these article on how to get it:

• Get Styles on QuirksMode
• Get Computed Style
• Get the rendered style of an element

最后一篇文章，这里是一个函数：

From the last article, here is a function:

function getStyle(oElm, strCssRule){
    var strValue = "";
    if(document.defaultView && document.defaultView.getComputedStyle){
        strValue = document.defaultView.getComputedStyle(oElm, "").getPropertyValue(strCssRule);
    }
    else if(oElm.currentStyle){
        strCssRule = strCssRule.replace(/\-(\w)/g, function (strMatch, p1){
            return p1.toUpperCase();
        });
        strValue = oElm.currentStyle[strCssRule];
    }
    return strValue;
}

如何使用它：

CSS：

/* Element CSS*/
div#container{
    font: 2em/2.25em Verdana, Geneva, Arial, Helvetica, sans-serif;
}

JS：

var elementFontSize = getStyle(document.getElementById("container"), "font-size");

这篇关于JavaScript获取样式的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！