jQuery find element by data attribute value

Question

Use Attribute Equals Selector

$('.slide-link[data-slide="0"]').addClass('active');

Fiddle Demo

.find()

it works down the tree

Get the descendants of each element in the current set of matched elements, filtered by a selector, jQuery object, or element.

You can also use .filter()

$('.slide-link').filter('[data-slide="0"]').addClass('active');

I searched for a the same solution with a variable instead of the String.
I hope i can help someone with my solution :)

var numb = "3";
$(`#myid[data-tab-id=${numb}]`);

you can also use andSelf() method to get wrapper DOM contain then find() can be work around as your idea

$(function() {
  $('.slide-link').andSelf().find('[data-slide="0"]').addClass('active');
})

.active {
  background: green;
}

<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js"></script>
<a class="slide-link" href="#" data-slide="0">1</a>
<a class="slide-link" href="#" data-slide="1">2</a>
<a class="slide-link" href="#" data-slide="2">3</a>