CSS `:where()` and `:is()` Selector

beginner
11 min

CSS :where() and :is() Selector

Welcome to this comprehensive tutorial on CSS :where() and :is() selectors! Today, we're going to dive deep into these powerful tools that will level up your CSS styling game. 🎯

What are :where() and :is() selectors?

:where() and :is() are advanced CSS selectors that allow you to create complex, specific, and efficient styles for your HTML elements. They can be used to target groups of elements based on a set of conditions, making your CSS code more modular and maintainable. 📝

Syntax and Examples

:where()

The :where() selector accepts a comma-separated list of simple selectors or negated selectors, and it matches elements that meet all the conditions.

css
div:where(p, span.highlight) { color: red; }

In this example, the div element will have a red color if it contains a p element or a span with the class highlight. 💡 Pro Tip: Using :where() can help reduce the specificity of your selectors, making it easier to manage your CSS styles.

:is()

The :is() selector is a more flexible version of :where(). It allows for more complex conditions, such as using the :not() pseudo-class and targeting custom elements.

css
my-custom-element, :is(.button, [type="button"], [type="submit"]) { background-color: blue; color: white; }

In this example, the my-custom-element and any elements with the class button, type="button", or type="submit" will have a blue background and white text. 💡 Pro Tip: Using :is() can help you write more generic selectors that can handle different HTML structures.

Quiz Time!

Quick Quiz
Question 1 of 1

What do `:where()` and `:is()` selectors do in CSS?

Stay tuned for more advanced examples and tips on using :where() and :is() selectors in your CSS projects! 🚀