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  2. CSS - Wikipedia

    en.wikipedia.org/wiki/CSS

    e. Cascading Style Sheets ( CSS) is a style sheet language used for specifying the presentation and styling of a document written in a markup language such as HTML or XML (including XML dialects such as SVG, MathML or XHTML ). [1] CSS is a cornerstone technology of the World Wide Web, alongside HTML and JavaScript.

  3. W3C Markup Validation Service - Wikipedia

    en.wikipedia.org/wiki/W3C_Markup_Validation_Service

    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.

  4. CSS HTML Validator - Wikipedia

    en.wikipedia.org/wiki/CSS_HTML_Validator

    Website. www .htmlvalidator .com. 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 ...

  5. Help:External link icons - Wikipedia

    en.wikipedia.org/wiki/Help:External_link_icons

    External links usually display an icon at the end of the link. CSS is used to check for certain filename extensions or URI schemes and apply an icon specific to that file type, based on the selected skin. [1] This page contains example URLs to demonstrate the link icons. The displayed icon only depends on the URL itself.

  6. HTML - Wikipedia

    en.wikipedia.org/wiki/HTML

    HTML. HyperText Markup Language ( HTML) is the standard markup language for documents designed to be displayed in a web browser. It defines the content and structure of web content. It is often assisted by technologies such as Cascading Style Sheets (CSS) and scripting languages such as JavaScript .

  7. Hyperlink - Wikipedia

    en.wikipedia.org/wiki/Hyperlink

    In computing, a hyperlink, or simply a link, is a digital reference to data that the user can follow or be guided to by clicking or tapping. [1] A hyperlink points to a whole document or to a specific element within a document. Hypertext is text with hyperlinks. The text that is linked from is known as anchor text.

  8. CodePen - Wikipedia

    en.wikipedia.org/wiki/CodePen

    CodePen is an online community for testing and showcasing user-created HTML, CSS and JavaScript code snippets. It functions as an online code editor and open-source learning environment, where developers can create code snippets, called "pens," and test them. It was founded in 2012 by full-stack developers Alex Vazquez and Tim Sabat and front ...

  9. Link relation - Wikipedia

    en.wikipedia.org/wiki/Link_relation

    t. e. A link relation is a descriptive attribute attached to a hyperlink in order to define the type of the link, or the relationship between the source and destination resources. The attribute can be used by automated systems, or can be presented to a user in a different way. In HTML these are designated with the rel attribute on link, a, or ...