Debugging Javascript / NodeJS

Explore how a stack trace records the sequence of steps leading to an error, using a house of cards analogy to reveal where the failure occurred and what it means.

fix bugs in a simple multiplication table app using logs only, validating inputs, examining event listeners, and debugging HTML output with Chrome DevTools to track inner HTML changes.

Learn how to use conditional breakpoints to pause code execution only when a condition, such as score equals five, is met, using Postman for requests and guiding the debugging flow.

Use log points to debug without restarting the app, display results length with curly braces, and add logs on the fly without redeploying.

Learn how uncaught exceptions crash apps, and how debugging pauses execution to reveal the error. Compare bare code with express safety features and practice fixing bugs to prevent crashes.

Master debugging javascript and nodejs using the debugger, breakpoints, and watch panels. Walk through line by line, visualize values, and identify bugs in loops and returns.

Add log points in Chrome DevTools by right-clicking a line and selecting log point to print variables. Toggle the console with ESC and log additional messages as needed.

Master the debugger console in DevTools, pause and inspect variables, step through functions, and use shortcuts like $0, $_, and copy to streamline debugging.

Pause code execution with Chrome DevTools by enabling break on caught and uncaught exceptions to pinpoint bugs, crashes, or freezes while debugging Ajax, fetch, or XHR requests.

Learn to pause code on any fetch, XHR, or Ajax request using Chrome DevTools breakpoints, or target a specific request by URL, aiding debugging of front-end requests.