[英]Better way to find all elements with a class name
Is there a better/faster way to find all elements with a class name in browsers that don't support document.getElementsByClassName
? 在不支持
document.getElementsByClassName
浏览器中,是否有更好/更快的方法来查找具有类名的所有元素?
var elements = document.getElementsByTagName('*'),
results = [];
for (var i=0; i < elements.length; i++) {
(elements[i].className === selector) ? results.push(elements[i]) : null;
}
return results;
And no I don't want to use jQuery :) 不,我不想使用jQuery :)
我将检查John Resig在模拟document.getElementsByClassName
方法上的比较 。
While IE8 doesn't support document.getElementsByClassName
, it does support document.querySelectorAll
, so that would be an option for IE8 anyway. 尽管IE8不支持
document.getElementsByClassName
,但它确实支持document.querySelectorAll
,因此无论如何这将是IE8的一个选项。
You could do something like: 您可以执行以下操作:
function byClass( sel ) {
var results;
if( document.querySelectorAll ) {
results = document.querySelectorAll( '.' + sel );
} else if( document.getElementsByClassName ) {
results = document.getElementsByClassName( sel );
} else {
var elements = document.getElementsByTagName('*'),
results = [];
// and so on
}
return results;
}
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