
Explore practical debugging with 25 React challenges, learn debugging strategies and tools, and apply them across standalone lessons and code sandbox challenges to restore apps to functionality.
Master debugging strategy to identify root causes by reproducing bugs. Use console errors and Chrome DevTools to determine if the fault is in your code or an external library.
Use console.table to map an eight by eight mine grid and visualize bombs and surrounding numbers for easy debugging.
Enable pause on uncaught exceptions in the webcam inspector to trigger a break point, hover to inspect the error line, and reveal the stack trace for quicker debugging.
Debug this challenge by using chrome dev tools and react dev tools to locate the submit handler, inspect the password validation, and reveal the secret password Coconut's.
This challenge guides debugging a button that doesn't work by inspecting render state, initializing useState with an empty array, and updating users via setUsers with the spread operator in React.
Investigate why the GitHub repos cards show no data by inspecting the network tab and React dev tools, then fix missing data like name and language.
Reproduce the mobile view with the device toggle, inspect styles and media queries, and adjust the width in the media query to auto or 100% for true mobile responsiveness.
Debug and fix a Material-UI radio group by wiring the onChange handler to event.target.value, ensuring the radio group maintains the selected value through form control labels.
debug a common class-based React issue where setState isn't a function by binding this or using arrow functions in event handlers.
Debug challenge 21 demonstrates unlocking a locked app without writing code by editing local storage in Chrome DevTools. Set the lock key to unlocked and refresh to access it.
Identify the charts and align their colors with the brand across Apex charts, Highcharts, and Chartist by adjusting options and using global settings guided by documentation.
Troubleshoot and fix a material-ui vehicle entry form by correcting validation logic, ensuring required fields behave correctly, clearing the form after submission, and auto focusing the first field.
Instantly Understand How Your React Application Really Works!
A Complete Guide to Debugging JavaScript and React
Dear student,
Web Development is hard.
Really hard.
Like, pulling your hair out, getting stuck for days or just giving up and finding another career hard.
And, there's really only one reason for that:
The exact set of skills to be successful in the real world isn’t documented anywhere.
There is one skill that developers almost never share:
What to do when you get stuck on an error message or bug?
After collecting data on 2 years of course enrollments, we found that over 90% of our questions could have been resolved if the student had learned basic JavaScript and React debugging.
Many students want to dive head first into React development. They follow a code-along tutorial but then inevitably are stuck forever and give up when the instructor doesn’t answer their question.
If you ever ran into a broken application and no idea what to do, and struggled to find help.. This course is for you!
Introducing our new course:
React Beginner Challenges - 25 Debugging Exercises
Unlike our other courses, here we do not rush into building an application. Instead, we first review a complete guide to debugging React and JavaScript applications.
By “complete" debugging strategy, we mean that seriously. Every tool or skill that you need to debug frontend applications is found in this course:
Find and fix source code with a full overview of Chrome DevTools
Understand how to track down where error messages come from and what they mean
How to examine the state of your React app from any point in your app
Easily find and research any JavaScript or React library
How to debug Material UI, Redux, charting libraries, and more
Best of all, in this course, we created 25 debugging exercises to test your skills. Each exercise comes with its own CodeSandbox link so you can jump into debugging for yourself. So you don’t need to install anything to run the exercises in this course.
I’m confident that if you take even half of this course, you will stop struggling with bugs and focus on actually building applications!
Note: This course assumes you already know some very basic information about React. It shouldn't be your very first React tutorial. It's ideal for beginners who have just started out and are either stuck or struggling with a project.
Access 25 Debugging Challenges with complete video solution tutorials
With these 25 bugs, you'll get more than enough practice solving real-world issues.
Eliminate your fear of React errors and bugs!