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W3Schools is a freemium educational website for learning coding online, launched in 1998 by Refsnes Data in Norway. It offers courses, tutorials, templates, and a live editor for various web technologies, such as HTML, CSS, JavaScript, Python, and more.
HTML is the standard markup language for web pages, defined by the W3C and ISO. Learn about its origins, elements, tags, attributes, versions and related technologies such as CSS, JavaScript and HTML5.
Learn how to use character entity references in XML and HTML documents, and see the list of predefined and custom entities for various scripts and symbols. Find out the differences between numeric and character entity references, and the formal public identifiers for HTML DTD entities subsets.
Learn the meaning and usage of HTTP response status codes, which indicate the server's response to a client's request. The codes are classified into five categories: 1xx, 2xx, 3xx, 4xx, and 5xx.
Learn how to specify web colors using hexadecimal format (hex triplet) or RGB values. A hex triplet is a six-digit number that represents the red, green, and blue components of a color, while RGB values are decimal numbers in the range 0 to 255.
HTML attributes are special words used inside the opening tag to control the element's behaviour. Learn about the types, functions, and examples of HTML attributes, such as id, class, style, title, and event attributes.
An HTML element is a type of HTML document component, one of several types of HTML nodes. Learn about the syntax, categories, attributes, and examples of HTML elements, and how they differ from HTML tags.
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