classnames
Utility for conditionally combining class names in React and other JavaScript projects.
Utilities npm MIT
Used in agent projects
86
0.7% of 12,697 public repos built with AI coding agents
Rank in utilities
#27 of 109
by use in those projects
Downloads
33.5M
npm, last 7 days, classnames
GitHub stars
17.8K
last push Oct 6, 2026
How classnames is used
classnames is a dependency in 86 of the 12,697 public GitHub projects set up for AI coding agents that we scanned (0.7%), #27 of 109 in utilities. The most used alternative there is clsx. Projects that use it most often also use React (96.5%), ESLint (75.6%), Testing Library (30.2%).
Often used with classnames
| React | 96.5% of classnames projects · 2.2× more than average |
|---|---|
| ESLint | 75.6% of classnames projects · 2.0× more than average |
| Testing Library | 30.2% of classnames projects · 4.2× more than average |
| React Router | 30.2% of classnames projects · 3.9× more than average |
| Tailwind CSS | 62.8% of classnames projects · 1.8× more than average |
| Prettier | 41.9% of classnames projects · 2.4× more than average |
| Axios | 31.4% of classnames projects · 3.2× more than average |
| Next.js | 46.5% of classnames projects · 2.1× more than average |
By coding agent
| Cursor | 0.9% of projects set up for it |
|---|---|
| Claude Code | 0.4% of projects set up for it |
| GitHub Copilot | 0.3% of projects set up for it |
Share of public repos configured for each agent that list classnames as a dependency.
Install
| Package | npm install classnames |
|---|---|
| Main stacks | TypeScript / JavaScript (42), Next.js (39), Python (2), React Native / Expo (2) |
| Example projects | sunflower-land/sunflower-land, ant-design/ant-design-web3, thepower/PowerDapp, blopa/Resume-Builder, aeminium-labs/nextjs-solana-starter-kit |
Alternatives to classnames
| Tool | Used in agent projects | Downloads / wk | GitHub stars | License |
|---|---|---|---|---|
| clsx npm Tiny utility for conditionally constructing className strings. |
2,251 (17.7%) | 126M | 9,847 | MIT |
| date-fns npm Modern JavaScript date utility library with comprehensive formatting functions. |
1,079 (8.5%) | 97.6M | 36.6K | MIT |
| uuid npm Generate RFC9562 compliant UUIDs for unique identifiers in applications. |
454 (3.6%) | 296M | 15.3K | MIT |
| PyYAML pypi YAML parser and emitter for reading and writing YAML configuration files. |
385 (3.0%) | 239M | 2,954 | MIT |
| Lodash npm Modular utility library with methods for common programming tasks and data manipulation. |
269 (2.1%) | 162M | 61.4K | MIT |
| bn.js npm Big number library for handling arbitrary-precision integers in JavaScript. |
217 (1.7%) | 62.1M | 1,230 | MIT |
| python-dateutil pypi Extensions to Python's datetime module for advanced date and time manipulation. |
165 (1.3%) | 233M | 2,638 | Dual License |
| yaml npm JavaScript YAML parser and stringifier with full spec compliance. |
164 (1.3%) | 179M | 1,693 | ISC |