What are some effective debugging tips for Node.js applications?

What are some effective debugging tips for Node.js applications?

Here are some effective debugging tips for Node.js applications: 1. Use console.log() to trace values. 2. Utilize the Node.js debugger. 3. Leverage tools like Chrome DevTools. 4. Implement error handling with try-catch blocks. 5. Use logging libraries like Winston or Morgan.

Can you explain how to use the Node.js debugger?

Certainly! To use the Node.js debugger, start your application with the command node inspect yourfile.js. You can set breakpoints, step through code, and inspect variables. Use commands like n to step to the next line and c to continue execution.

What logging libraries do you recommend?

I recommend using Winston for its versatility and support for multiple transports. Morgan is great for HTTP request logging. Both are widely used in the Node.js community.

How can I handle uncaught exceptions?

You can handle uncaught exceptions by using the process object. Add a listener for the 'uncaughtException' event like this: process.on('uncaughtException', (err) => { console.error(err); });. However, it's better to handle errors gracefully in your application.

Any tips for debugging asynchronous code?

For debugging asynchronous code, use async/await for better readability. You can also use tools like async_hooks to track asynchronous resources and their lifecycle.