jQuery·jQuery from selection to migration

Selection and chaining

Wrap elements, filter collections and chain operations.

Beginner 12 min read Lesson 2 of 300 Challenge included

What you will be able to do

Use $() with a CSS selector.
Chain methods that return the collection.
Use .find for descendants and .filter for the current set.
Cache selections instead of repeating them.

In plain English

The $ function returns a jQuery collection. Most methods return the same collection, which is why chaining works. Select with CSS, then narrow with .filter, .find or .eq.

select.jsJavaScript

const cards = $('.card')
cards.filter('.is-featured').addClass('is-highlighted')
cards.find('a').attr('target', '_blank')

Your turn

Select and add a class

Easy

Add the class active to the element with id hero.

JAVASCRIPT · starter

$()

Check your understanding before moving on.

Knowledge checkQuestion 1

Why does chaining work in jQuery?

Select an answer to continue

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Next: DOM manipulation

Lesson 2 of 300 · 0% of course