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At W3Schools you will find complete references about HTML elements, attributes, events, color names, entities, character-sets, URL encoding, language codes, HTTP messages, browser support, and more:

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Note: This is an optional feature. You can study at W3Schools without creating an account.

Note: This is an optional feature. You can study at W3Schools without creating an account.

W3Schools maintains a complete JavaScript reference, including all HTML and browser objects. The reference contains examples for all properties, methods and events, and is continuously updated …

SQL References At W3Schools you will find a complete reference for keywords and functions:

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CSS References At W3Schools you will find complete CSS references of all properties and selectors with syntax, examples, browser support, and more.