---
title: "clsx"
description: "A small utility for composing conditional CSS class names."
pagination: false
---

{/* Generated from content/. Edit the catalog, not this page. */}

<PurposeNote title="Good for">Building className values from component states and optional styles.</PurposeNote>

## What it does

A small utility for composing conditional CSS class names.

## When it fits

Building className values from component states and optional styles.

## Other options in this category

<div data-pagefind-ignore>

- [chroma.js](/styling/chroma-js) — Generating palettes and color scales for interfaces or charts.
- [Class Variance Authority](/styling/class-variance-authority) — Managing size, color, and state variants in a component system.
- [CSS Modules](/styling/css-modules) — Writing stylesheets without exposing every class name globally.
- [Emotion](/styling/emotion) — Building component-level styles with a flexible CSS-in-JS API.
- [Fancy ANSI](/styling/fancy-ansi) — Showing colored command output inside browser-based interfaces.

</div>

## Source

[Project source for clsx ↗](https://github.com/lukeed/clsx)

Editorial overview reviewed on October 24, 2026. Follow the source for current setup, compatibility, and licensing.

[Style and theme components →](/tasks/style-and-theme-components)

[All styling &amp; themes options →](/styling)