Is it a bad practice to add extra attributes to HTML elements?

Question

Sometimes I add an attribute to some of my controls. Like:

Chris Sharma

I know it

Answer 1

It is not a best nor a good practice.

I guess you need it for some javascript treatment. I usually solve the problem by adding custom "class" attribute, prefixed with 'js'.

Another solution is to use the store data/retrieve data functionnality of JQuery, or the equivalent of any other framework, which imply echoing all over your generated HTML.