MDN Web Docs
Why it's useful: Read practical documentation and guides on HTML, CSS, JavaScript, and web platform APIs.
First try: about 5 minutesCost: Free
Best for
Learners and developers who need a standards-oriented explanation or reference while building for the web.
A good first step
Search for the exact element or API, read its usage guide, and test the smallest example in a safe local page.
What to check
Browser support and APIs change. Check compatibility information and the date/context of documentation before relying on an edge feature.
Access and pricing
Documentation is available online; see MDN for current access and contribution details.
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