Question

How to debug Node.js code?

I’m looking for the best ways to debug Node.js code effectively. I know there are various methods, like using console.log statements or built-in debugging tools, but I’m not sure which approach is most efficient or how to get started with these tools.

Answer 1

Debugging Node.js code can be done effectively with several built-in and external tools. Here’s a guide on how to approach it:

1. Use the console.log() Method

• The simplest way to debug is by adding console.log() statements to inspect variables and program flow.

• Use it to print out function arguments, state changes, or specific messages that indicate where the code execution is.

2. Built-In Debugger (node inspect) 

• Node.js has a built-in debugger. Run your script with:

• node inspect yourFile.js

• This will start the debugger and pause at the first line. Use n to go to the next line and c to continue execution until the next breakpoint.