Testing frameworks are tools that help developers automate the process of testing their code. With the help of testing frameworks, developers can write test cases that can be executed automatically, which saves a lot of time and effort in the software development process.

There are many testing frameworks available for JavaScript.

1. Jest: Developed by Facebook, Jest is a testing framework that is simple to set up and use, and comes with built-in mocking capabilities.

2. Mocha: Mocha is a flexible testing framework that can be used for both synchronous and asynchronous testing, and supports multiple libraries and assertion styles.

3. Jasmine: Jasmine is another popular testing framework that is easy to set up and is highly customizable. It provides a complete suite of testing features, such as test reporting and mocking.

4. Chai: Chai is an assertion library that can be used with any testing framework. It provides a simple and intuitive syntax for writing assertions, making it easy to test your code.

Using a testing framework can help you catch bugs early in the development process, and ensure that your code meets your requirements and specifications. It also helps you maintain code quality and makes it easier to refactor your code in the future.