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Package Summary

classnames is a simple JavaScript utility for conditionally joining class names together. It's a fundamental tool for React, Vue.js, and other front-end projects where dynamic class manipulation is common. The library takes any number of arguments which can be a string or object and returns a single string of class names. It's lightweight, dependency-free, and handles truthy/falsy values gracefully, making it easy to manage CSS classes in a declarative and maintainable way.

Security Overview

Vulnerabilities

Last Version with Vulnerabilities

N/A

Vulnerabilities Tracker

Historycal data about package vulnerabilities across all the stable versions

Vulnerabilites Summary

The `classnames` npm package versions 1.0.0 through 2.5.1 have no reported security vulnerabilities according to the provided data. All listed versions show a vulnerability count of 0.

Complete Security Overview

Release Frequency

Historycal data about package versions

Releases Summary

The npm package classnames saw frequent releases from November 2014 to December 2015, with a peak of 5 versions in February 2015. Release frequency decreased significantly after 2015, with sporadic releases in 2016, 2018, 2021, 2022 and 2023. There have been no releases in 2024 or 2025 as of September 9, 2025.

All Versions

Popularity Overview

GH Stars

18K

GH Forks

560

GH Watchers

120

Downloads History

Historycal data about package downloads in the last 18 months

Popularity Summary

Classnames npm package downloads show a generally upward trend from March 2024 to August 2025, peaking in July 2025 at over 76 million. There was a significant increase in downloads in the early months of 2025. September 2025 data is incomplete, showing a sharp drop.