How do I set up Jest for my JavaScript project?

How do I set up Jest for my JavaScript project?

To set up Jest, first install it using npm: npm install --save-dev jest. Then, add a test script in your package.json.

What configuration do I need in my package.json?

You can add a "test" script like this: "test": "jest". You can also configure Jest options in a "jest" field.

Do I need to create a separate configuration file?

It's optional! You can use a separate jest.config.js file for more complex configurations, but it's not required for basic setups.

How do I run my tests after setting it up?

Simply run npm test in your terminal, and Jest will find and execute your test files.