What is a stack trace in JavaScript?

What is a stack trace in JavaScript?

A stack trace is a report of the active stack frames at a certain point in time during the execution of a program. It helps in debugging by showing the sequence of function calls that led to an error.

How can I read a stack trace?

To read a stack trace, look for the error message at the top, followed by a list of function calls. Each line typically shows the function name, the file name, and the line number where the function was called.

Can you give me an example of a stack trace?

Sure! Here's a simple example:

TypeError: Cannot read property 'foo' of undefined
    at bar (app.js:10)
    at baz (app.js:5)
    at main (app.js:1)

This indicates that the error occurred in the bar function, which was called by baz, and so on.

What tools can help me analyze stack traces?

You can use browser developer tools, like Chrome DevTools, which provide a console to view stack traces. Additionally, libraries like Sentry or Rollbar can help capture and analyze errors in production.