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js通过元素class名字获取元素集合的具体实现_javascript技巧

WBOY
WBOYOriginal
2016-05-16 17:05:111365browse
复制代码 代码如下:

function getElementsByClassName(n) {
var classElements = [],allElements = document.getElementsByTagName('*');
for (var i=0; i{
if (allElements[i].className == n ) {
classElements[classElements.length] = allElements[i];
}
}
return classElements;
}
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