css function - Brave Search

developer.mozilla.org › en-US › docs › Web › CSS › Reference › At-rules › @function

function - CSS - MDN Web Docs - Mozilla

January 6, 2026 - The @function CSS at-rule enables defining CSS custom functions. Once defined, a custom function can be called using the syntax (for example, --my-function(30px, 3)) within any property value.

w3schools.com › cssref › css_functions.php

CSS Functions Reference

accent-color align-content align-items align-self all animation animation-delay animation-direction animation-duration animation-fill-mode animation-iteration-count animation-name animation-play-state animation-timing-function aspect-ratio backdrop-filter backface-visibility background background-attachment background-blend-mode background-clip background-color background-image background-origin background-position background-position-x background-position-y background-repeat background-size block-size border border-block border-block-color border-block-end border-block-end-color border-block-

Videos

The CSS "function" proposal is WILD (I think I like it?) - YouTube

February 16, 2025

I Love the NEW CSS Functions - YouTube

December 30, 2025

20 Modern CSS Features You Should Know About - YouTube

CSS Custom Functions with @function - YouTube

August 13, 2025

CSS Functions Explained - #2 var - YouTube

October 19, 2022

developer.mozilla.org › en-US › docs › Web › CSS › Reference › Values › Functions

CSS value functions - MDN Web Docs

January 20, 2026 - CSS value functions are statements that invoke special data processing or calculations to return a CSS value for a CSS property. CSS value functions represent more complex data types and they may take some input arguments to calculate the return value.

css-tricks.com › functions-in-css

Functions in CSS?! | CSS-Tricks

March 3, 2025 - I was drinking coffee when I read the news on Chrome prototyping functions in CSS and… I didn’t spit it or anything. I was excited, but thought “functions” in CSS would be just like mixins in Sass — you know, patterns for establishing reusable patterns.

web.dev › learn › css › functions

Functions - CSS

June 6, 2025 - A function is named so you can call it within your code and you can pass data into the function. This is known as passing arguments. A lot CSS functions are pure functions, which means that if you pass the same arguments into them, they will always give you the same result back, regardless of what is happening in the rest of your code.

una.im › 5-css-functions

una.im | 5 Useful CSS functions using the new @function rule

August 13, 2025 - This capability is an absolute game-changer for writing more organized and dynamic CSS. While custom properties let you store a dynamic value that you access with var(), a custom function can run logic. It accepts arguments you pass to it, and spits out a new value.

The Odin Project

theodinproject.com › lessons › node-path-intermediate-html-and-css-css-functions

CSS Functions | The Odin Project

Similar to programming languages, functions in CSS are reusable pieces of code which perform specific tasks. Functions are passed “arguments” between parentheses, each of which is used by the function in a specific way.

css-tricks.com › complete-guide-to-css-functions

CSS Functions Guide | CSS-Tricks

August 21, 2025 - This function takes two arguments and calculates a result from the operator (+, -, *, /) you supply it, provided those arguments are numbers with or without an accompanying unit. Unlike CSS preprocessors such as Sass, calc() can mix units, meaning you can do things like subtract 6rem from 100%. calc() is also updated on the fly, so if that 100% represents a width, it’ll still work if that width changes.

w3.org › TR › css-mixins-1

CSS Functions and Mixins Module

May 15, 2025 - This module defines the ability for authors to define custom functions, acting similar to parametrized custom properties. They can use the full power of CSS’s values and conditional rules. It also defines an early form of a similar idea for CSS rule mixins, allowing parametrized substitution ...

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quackit.com › css › functions

Alphabetical list of CSS functions included in CSS3.

sass-lang.com › documentation › at-rules › function

Sass: @function

Functions are defined using the @function at-rule, which is written @function <name>(<arguments...>) { ... }. A function’s name can be any Sass identifier that doesn’t begin with --. It can only contain universal statements, as well as the @return at-rule which indicates the value to use as the result of the function call. Functions are called using the normal CSS function syntax.

developer.mozilla.org › en-US › docs › Web › CSS › Guides › Custom_functions_and_mixins › Using_custom_functions

Using CSS custom functions - CSS | MDN

CSS custom functions enable you to create reusable blocks of CSS code that can accept arguments, contain complex logic (defined using features such as CSS if() functions and @media at-rules), and return values based on that logic. They work similarly to CSS custom properties, but provide more ...

dev.to › web_dev-usman › every-css-function-you-need-with-practical-examples-23h

Every CSS Function You Need – With Practical Examples - DEV Community

April 5, 2025 - Here’s a complete cheat sheet of CSS functions, neatly organized by category for quick reference....

stackoverflow.com › questions › 4914533 › do-css-functions-exist

Do CSS functions exist? - Stack Overflow

I know I'm late to the party but the selected answer IS NOT the right answer since it's deferring it to CSS preprocessors.

To answer the specific question "Do CSS functions exist?", the answer is: Yes.

However, CSS functions work completely different than the OP's concept initially is.

cuixiping's answer seems the most correct answer.

Examples of CSS functions are:

url()
attr()
calc()
rotate()
scale()
linear-gradient()
sepia()
grayscale()
translate()

A detailed, comprehensive list can be found here:

CSS functions on MDN Updated link 18/9/20

You can't programatically control CSS from your markup, but you can use one of the many CSS extensions to make CSS work more like a compiled language.

http://lesscss.org/

http://sass-lang.com/

If we wrote your example in LESS, we'd get something like this:

.somepattern(@color: red, @size: 16px) {
    font-size:@size;
    font-weight:bold;
    border:2px solid @color;
}

And then you could use it in your LESS file like so:

.myclass {
    .somepattern(green, 20px);
}

geeksforgeeks.org › css › css-functions-complete-reference

CSS Functions Complete Reference - GeeksforGeeks

July 12, 2025 - CSS functions are used to dynamically define or manipulate property values in stylesheets, making designs more flexible and responsive.

developer.mozilla.org › en-US › docs › Web › CSS › CSS_Values_and_Units › CSS_Value_Functions

CSS value functions - MDN - Mozilla

October 8, 2025 - CSS value functions are statements that invoke special data processing or calculations to return a CSS value for a CSS property. CSS value functions represent more complex data types and they may take some input arguments to calculate the return value.

The Knowledge Academy

theknowledgeacademy.com › blog › css-functions

CSS Functions: Enhance Your Styling Capabilities

September 9, 2025 - With these functions, developers can precisely control colours and create gradients, shadows, and other effects. CSS offers functions like ‘linear-gradient()’ and ‘radial-gradient()’ to create smooth transitions between two or more colours. Gradients add depth and richness to backgrounds and elements.

youtube.com › watch

First look at FUNCTIONS in CSS!!! (it's a game changer) - YouTube

Get updates about new videos → https://tinyurl.com/yuu8x8myFollow me on Twitter: https://x.com/dmtrmrvFollow me on Bluesky: https://bsky.app/profile/dmtrmrv....

Published March 6, 2025

stackoverflow.com › questions › 7725805 › how-to-write-function-in-css

sass - How to write function in css - Stack Overflow

How to write function in css? I know that possible with SCSS; Is their any way with which i can achieve this in css?

The answer is No.

CSS is not a programming language. It does not have functions. It really isn't designed to be used this way at all.

Whatever problem it is that you're trying to solve by wanting to write CSS functions, there is almost certainly a better way to achieve it.

You can't in standard CSS, you might want to look at http://lesscss.org/ though

Chrome Developers

developer.chrome.com › blog › css conditionals with the new if() function

CSS conditionals with the new if() function | Blog | Chrome for Developers

Learn about the new CSS if function, which enables a cleaner developer interface for dynamic styles like style queries and media queries.