TUTO 21: I Built a Regex Sandbox with JavaScript! (FreeCodeCamp Challenge)
🧪In this video, I build a Regex Sandbox app using JavaScript — a real-time tool that helps you test and understand regular expressions. This is Tutorial 21 in my FreeCodeCamp JavaScript Challenge series, where I build one project per day on my path to becoming a full stack developer.
What you’ll learn in this video:
How to create regular expressions based on user input
Understanding the use of flags like "g" (global) and "i" (case-insensitive)
How to use checkboxes to toggle options in JavaScript
Working with match, replace, and join functions
Displaying results dynamically using DOM manipulation
Highlighting matched text with custom styles
Project features:
Pattern and test string input fields
Toggle options for regex flags
Live feedback with color-highlighted matches
Error handling for "no match" cases
Clean and simple UI using only HTML, CSS, and JavaScript
Whether you’re new to regex or want to improve your JavaScript string handling skills, this is a great exercise to build real-world functionality.
Follow my developer journey:
GitHub: github.com/NKWILI
LinkedIn: linkedin.com/in/alain-ngongang-0b57ab19a
Series playlist: • Build Real JavaScript Projects (FreeCodeCa...
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