I don't advise using W3School as an ultime reference. It's good to learn things but It's known to contain few mistakes and some inaccurate content. Always consider the MDN and the official specification as a reference (even if I know that the specification is not easy to follow for beginners)
MDN is the sweet spot for me. Clear, accurate, comprehensive enough for almost all use cases as a web developer. The spec can be useful if you need a deep dive, but it's more for implementers rather than consumers of web APIs.
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I don't advise using W3School as an ultime reference. It's good to learn things but It's known to contain few mistakes and some inaccurate content. Always consider the MDN and the official specification as a reference (even if I know that the specification is not easy to follow for beginners)
MDN is the sweet spot for me. Clear, accurate, comprehensive enough for almost all use cases as a web developer. The spec can be useful if you need a deep dive, but it's more for implementers rather than consumers of web APIs.