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W3C Markup Validation Service. Tag certifying that a website has been checked for well-formed XHTML (above) and CSS (below) markup. The Markup Validation Service is a validator by the World Wide Web Consortium (W3C) that allows Internet users to check pre-HTML5 HTML and XHTML documents for well-formed markup against a document type definition.
Help:Markup validation. The W3C Markup Validation Service lets editors check web pages for conformance to HTML and XHTML standards. It is helpful for catching minor problems such as duplicate section names or citation IDs. Although most major browsers will tolerate many of the errors, and will display a document successfully even if it contains ...
The text between < html > and </ html > describes the web page, and the text between < body > and </ body > is the visible page content. The markup text < title > This is a title </ title > defines the browser page title shown on browser tabs and window titles and the tag < div > defines a division of the page used for easy styling.
CSS HTML Validator (previously named CSE HTML Validator) is an HTML editor and CSS editor for Windows (and Linux when used with Wine) that helps web developers create syntactically correct and accessible HTML / HTML5, XHTML, and CSS documents by locating errors, potential problems like browser compatibility issues, and common mistakes.
A validator is a computer program used to check the validity or syntactical correctness of a fragment of code or document. The term is commonly used in the context of validating HTML, [1] [2] CSS, and XML documents like RSS feeds, though it can be used for any defined format or language. Accessibility validators are automated tools that are ...
CSS, or Cascading Style Sheets, is a language that defines the presentation of web pages, such as layout, colors, fonts, and animations. CSS is used to separate the content from the appearance, and to enable more flexibility and accessibility. Learn more about the history, syntax, and features of CSS on Wikipedia.
HTML attributes are special words used inside the opening tag to control the element's behaviour. HTML attributes are a modifier of a HTML element type . An attribute either modifies the default functionality of an element type or provides functionality to certain element types unable to function correctly without them.
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