IE中的currentStyle为null [英] currentStyle in IE is null

问题描述

我想要计算当前样式的元素：

I am trying to caculate the current style of an element:

function cssIsLoaded(c) {
    if (window.getComputedStyle) {
        return window.getComputedStyle(c, null).display === "none";
    }
    else if (c.currentStyle) {

    }

    return true;
}

(function() {
    var cssload = document.createElement("div");
    cssload.className = "_css_loaded";
    checkLoaded();

    function checkLoaded() {
        if (!cssIsLoaded(cssload)) setTimeout(function() {
            checkLoaded();
        }, 20);
        else blalbalblbalbalablbal();
    }
})();

IE不进入第二个条件， c.currentStyle is null ...为什么？

IE doesnt get into the 2nd condition, c.currentStyle is null... why is that?

推荐答案

元素不会得到它的 currentStyle 属性，直到它被添加到文档，这是有道理的：直到元素被添加到文档，浏览器不能知道哪些现有的样式规则将适用于它。

An element doesn't get its currentStyle property populated until it's added to the document, which makes some sense: until the element's been added to the document, the browser cannot know which existing style rules will apply to it.

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