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This post is part of my Today I learned series in which I share all my web development learnings.

A common operation when building interfaces is to figure out if an element contains a particular class. Today I learned about Element.prototype.matches. The element method can be used to check if an element includes a certain class and is way shorter than element.classList.contains. ๐ŸŽ‰

const elem = document.querySelector('.foo');

elem.classList.contains('bar'); // true
elem.matches('.bar');           // true

It turns out matches can also deal with a selector that includes multiple classes. elem.matches('.foo, .bar') returns true for elements with the class .foo or .bar. ๐Ÿ‘

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Stefan standing in the park in front of a green background

Frontend nerd with over ten years of experience, "Today I Learned" blogger, conference speaker, Tiny helpers maintainer, and DevRel at Checkly.