Debugging is the process of identifying and fixing errors to ensure an application runs smoothly. Node.js provides various built-in tools to help troubleshoot and debug applications efficiently.
- They help in identifying runtime errors.
- Improves code efficiency by detecting memory leaks.
- Enables developers to monitor application execution flow.
- Ensures error-free and reliable applications.
Ways to Debug Node.js Applications
Although console.log() is useful for basic debugging, advanced tools provide a more efficient and structured way to debug complex Node.js applications.
- console.log() is useful for quick value checks and tracing execution.
- Excessive logging can clutter code and reduce readability.
- Logs alone are inefficient for debugging complex applications.
- Debugging tools provide breakpoints and step-by-step execution.
- Advanced tools enable call stack analysis and variable inspection.
Adding a Debugger to Debug Your Code
While console.log() is commonly used, it's not the most efficient for complex debugging tasks. Instead, you can use the V8 Inspector in NodeJS.
Steps for debugging in Node
Step 1: Write the following code in the terminal window as shown below:
node --inspect-brk filename.js
Step 2: Open your Chrome browser and write inspect as shown below
Step 3: Now click on Open Dedicated DevTools for Node.
Step 4: Now, click on the NodeJS icon. The terminal will show the following message:
Step 5: Other tools to help launch a DevTools window:
june07.com/nim
github.com/jaridmargolin/inspect-process
github.com/darcyclarke/rawkit