Code Your Own Code Editor – JavaScript, HTML, CSS Tutorial

Published: 15 September 2025
on channel: freeCodeCamp.org

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Code your own code editor! This course shows you how to build a lightweight, browser-based code editor that runs entirely on a single HTML page. You’ll create tabbed editors for HTML, CSS, and JavaScript, complete with an instant live preview in a sandboxed iframe.

Course developed by ‪@programmingoceanacademy‬

Code: https://github.com/MOHAMMEDFAHD/Web-D...

https://www.programming-ocean.com/

⭐️ Contents ⭐️
— 0:00:00 Intro
— 0:01:54 Project walkthrough & showcase
— 0:18:02 HTML structure: scaffolding the page
— 1:04:05 CSS styling & layout (panels, tabs, responsive)
— 2:20:20 JavaScript functionality: tabs, live preview, save/load
— 4:06:35 Importing Ace Editor & final touches

❤️ Support for this channel comes from our friends at Scrimba – the coding platform that's reinvented interactive learning: https://scrimba.com/freecodecamp

🎉 Thanks to our Champion and Sponsor supporters:
👾 Drake Milly
👾 Ulises Moralez
👾 Goddard Tan
👾 David MG
👾 Matthew Springman
👾 Claudio
👾 Oscar R.
👾 jedi-or-sith
👾 Nattira Maneerat
👾 Justin Hual

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