Javascript for adding a custom attribute to some elements

Question

Given a section of HTML, can I selectively pick some types of elements (e.g., input) and add a custom attribute using JavaScript? I would also need to remove this attribute if it exists.

I have done this before using jQuery, but I'm unable to use it for this particular task.

Answer 1

Accessing HTML attributes using the DOM

element.hasAttribute('foo'); element.getAttribute('foo'); element.setAttribute('foo', value); element.removeAttribute('foo');