clsx is a lightweight JavaScript utility that generates className strings conditionally. At a minute 234B in size, it serves as a faster and tinier drop-in alternative for the commonly used classnames module. clsx can accept any mix of Objects, Arrays, Booleans, or Strings as its input, and discards any falsy values. This makes it an excellent tool for assigning class names to HTML elements conditionally in your web projects.
To add clsx to your project, first install it through npm with the command npm install --save clsx. You can then import the clsx function into your JavaScript file with the line import clsx from 'clsx';.
Here is an example of how to use clsx:
import clsx from 'clsx';
// To generate class strings...
let className = clsx('foo', true && 'bar', 'baz');
// To conditionally include classes...
let isActive = true;
let className = clsx('button', isActive && 'button-active');
// To use with Objects, Arrays, mixed types....
let className = clsx('foo', [1 && 'bar', { baz: false, bat: null }, ['hello', ['world']]], 'cya');
In these examples, clsx generates a class string based on the conditions given in its arguments. If a condition is true, clsx includes the related string in the class name.
Comprehensive documentation for the clsx package can be found on its GitHub page. This includes detailed usage examples, an API reference, and benchmarks comparing clsx's performance to other className utilities. Furthermore, the page details support for various Node.js versions and browsers, and provides steps to enable class autocompletion using clsx with the popular Tailwind CSS framework. For an even deeper dive, the source code can be examined by following the provided git link: git+https://github.com/lukeed/clsx.git.
