How to add data-role="collapsible" in a div container

Question

How can I add data-role="collapsible" in every div container with class "make_me_collapsible"?

<div class="make_me_collapsible"><h2>Header</h2><p>Content....</p></div>

Answer 1

You can add it with the attr() method. Like so:
$(".make_me_collapsible").attr("data-role","collapsible");