What is mocha-demos?

This repository is a collection of hands-on examples teaching you how to use Mocha, a testing framework for JavaScript. Think of testing like quality control for code, you write small checks that verify your code works the way you expect. Mocha makes writing and running those checks straightforward and organized. The repo contains nine different demo folders, each showing a specific feature of Mocha. You start with the basics: how to write a simple test that checks if a function produces the right answer. Then you move through increasingly practical scenarios, like testing code that uses newer JavaScript syntax, handling operations that take time to complete (like fetching data from a server), and even running tests in a web browser instead of just on your computer. The demos are designed to be small and self-contained, so you can run each one independently and see the results immediately. This would be useful if you're learning to test your JavaScript code or want to understand Mocha's features before using it in a real project. A beginner might start here to learn testing habits, a more experienced developer might use it as a quick reference for Mocha's configuration options and patterns. The repo accompanies a tutorial article (originally written in Chinese), so it's intentionally example-focused rather than theory-heavy. To use it, you clone the repository, install Mocha, and then run each demo's test file. You can experiment with the code examples, modify them, and see how Mocha responds. The progression is deliberate, early demos show the fundamentals, while later ones cover advanced features like setup and teardown hooks (code that runs before or after tests) and filtering which tests to run.