向DOM对象添加自定义（您自己的）属性，好吗？

Question

<div id="theDiv"></div>

document.getElementByid('theDiv').myProperty='myValue';

if('undefined'!==typeof document.getElementById('theDiv').myProperty){

Is it ok and cross browser compatible to give DOM objects custom properties to be used later on?

If the properties only need to be set and retrieved via javascript can this be used instead of setAttribute / getAttribute?

Answer 1

Edit 2014/07/21

According to @blgt comment and everything else I read, it seems that the future proof issue is the only problem you could encounter.

Actually, doing a jsperf on it shows it's even a bit faster than setAttribute / getAttribute

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Should be comment

Maybe this answer may help you : https://stackoverflow.com/a/3363501/3702797

or this question

and particularly this answer