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HTML · CSS · JS Panes
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The Swift Web Dev Course taught concepts, but students had nowhere to immediately try them
Every lesson in CodeVent Digital's curriculum introduces a new HTML, CSS, or JavaScript concept, but reading about a concept and actually writing it are two different things. Sending beginners off to install a code editor and set up a local dev environment before they've written a single line of code was exactly the kind of friction the curriculum was designed to avoid.
The Portable Code Editor was built to close that gap, a practice environment students could open directly from a lesson page, write code in, and see the result instantly, with nothing to configure first.
Local dev environments are the single biggest drop-off point for beginners
Installing a code editor, configuring extensions, and figuring out how to preview an HTML file in a browser is trivial for an experienced developer and genuinely intimidating for someone on day one. A meaningful share of beginners abandon a course at this exact step, before they've written any real code at all.
The brief was simple to state and harder to build: give a complete beginner a working HTML, CSS, and JavaScript environment in one click, with zero prior setup.
A three-pane editor with an instant live preview, running entirely in the browser
No backend, no build step, no account. The editor renders HTML, CSS, and JavaScript together in a live preview pane as the student types, the same feedback loop a professional dev environment gives, stripped down to what a beginner actually needs.
How It Works
Three editable panes
Separate HTML, CSS, and JavaScript panels, so students can see exactly which language controls what, instead of one tangled file.
Live preview pane
Code renders as the student types, an immediate cause and effect loop that makes abstract syntax feel concrete right away.
Nothing to lose on refresh
Work is kept in the browser as students go, so accidentally closing a tab mid-lesson doesn't mean starting over.
Key Design Decisions
Now the interactive practice environment inside every lesson of CodeVent Digital's curriculum
Every concept page in the Swift Web Dev Course links directly to the editor, closing the gap between reading about a concept and actually writing it. Students go from lesson to practice in a single click, with zero setup friction, exactly the outcome the course itself was designed around.
Because it doesn't depend on the curriculum to be useful, it also functions as a small, standalone open source tool, a fast way for any developer to test an idea without opening a local project.
Building a code editor from scratch, live preview, multi-pane state, in-browser rendering, is a different kind of technical problem than a marketing site or a landing page. It's a real sign of frontend depth: understanding how to build tools, not just interfaces, and shipping something that has to just work with no backend to fall back on.
Need a tool your users can start using instantly?
Whether it's an in-browser tool, a learning environment, or a product feature that needs to just work with no setup, I'll build it properly.