Debugging in Node Learning Goals

• Use the Node.js debugger
  • Debugging-in-node

In this lesson we've learned about using the debugger built in to Node.js. To review, the process is as follows:

• Place one or more breakpoints in your code using the debugger keyword
• Run node inspect in the terminal to launch the debugger
• Run cont at the debug prompt to start execution of the code and advance to the first breakpoint
• Run repl at the debug prompt to enter the debugger's REPL
• Check the value of any variables by entering the variable name at the > prompt
• Exit the REPL using ctrl-C
• Continue stepping through the code using cont
• Run .exit or type ctrl-C twice to exit the debugger

Resources

W3schools - JavaScript Debugging
Difference between Node.js and Javascript

Errors and Stack Traces Learning Goals

• Recognize common JavaScript errors.
• Read a stack trace to discern where an error originated.
  • Errors-and-stack-traces
    

Resources

MDN- Errors

Uncaught ReferenceError: _____ is not defined (Links to an external site.)
Uncaught TypeError: _____ is not a function (Links to an external site.)
Uncaught SyntaxError: missing ) after argument list (Links to an external site.)
Uncaught TypeError: Assignment to constant variable.