Using non W3C valid attributes on HTML elements

What is your opinion about using non valid attributes on html elements for easier jQuery selectors etc ?

Eg.

<div name="开发者_StackOverflow中文版myDiv"></div>

According to Visual Studio the name attribute is not valid for a div element.

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I would recommend using "dummy" classes (and the jQuery class selector) to disambiguate naming of html elements. 100% compliant approach.

Class Selector (“.class”)

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If you absolutely must, use the data pseudo-namespace; such as data-id or data-name.

Edit: Using the data pseudo-namespace is far better than perverting the usage of an existing attribute like class or id.

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If you still wanted to remain w3c compliant, the w3c allows title attribute for extra information, which you can use in lieu of adding new non-standard attributes.