How I built a live code editor

Описание и применение

Простой веб‑редактор, где ввод HTML‑кода в textarea мгновенно отображается в iframe‑окне, реализованный только с помощью чистого HTML, CSS и JavaScript.

Задача

Need a fast, lightweight sandbox to test code snippets directly in the browser without heavy frameworks.

Результат

A lightweight live code editor that updates an iframe preview in real time, enabling quick experimentation with HTML/CSS.

Рабочий процесс

• Create index.html with textarea and iframe.
• Add CSS for layout and styling.
• Write script.js to listen for input events on textarea.
• On input, grab textarea value, open iframe document, write code, close document.
• Initialize preview on DOMContentLoaded.
• Deploy the files to a web server or local host.

Доказательства

Every single time a key is pressed, JavaScript grabs the string value and uses .write() to dynamically inject it straight into the iframe's document layout.

Источник

I want to add: Separate workspace tabs for HTML, CSS, and JS files. A download feature to export files directly to your local computer.

Источник