1. ecma-international
https://www.ecma-international.org/
Home - Ecma International
Ecma International is an industry association dedicated to the standardization of information and communication systems Ecma is driven by industry members to meet their needs, providing a healthy competitive landscape based on differentiation of products a
www.ecma-international.org
2. MDN (추천)
최신정보, 공부하기에 유용
https://developer.mozilla.org/ko/
MDN Web Docs
The MDN Web Docs site provides information about Open Web technologies including HTML, CSS, and APIs for both Web sites and progressive web apps.
developer.mozilla.org
3. W3Schools
공식사이트는 아니지만, 보기 쉽게 되어있음
W3Schools Free Online Web Tutorials
W3Schools offers free online tutorials, references and exercises in all the major languages of the web. Covering popular subjects like HTML, CSS, JavaScript, Python, SQL, Java, and many, many more.
www.w3schools.com
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