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  1. HTML doctype declaration - W3Schools

    Definition and Usage All HTML documents must start with a <!DOCTYPE> declaration. The declaration is not an HTML tag. It is an "information" to the browser about what document type …

  2. HTML Doctype Declaration | Docs With Examples - Hackr

    Mar 12, 2025 · Learn about DOCTYPE in HTML, why it is important, its role in standards mode, and how it impacts SEO and web development best practices.

  3. W3C QA - Recommended list of Doctype declarations you can …

    Jul 1, 2016 · When authoring document is HTML or XHTML, it is important to Add a Doctype declaration. This makes sure the document will be parsed the same way by different browsers. …

  4. Syntax of HTML5 Doctype Declaration - Tutorial Republic

    With HTML5 this is no longer the case and the doctype declaration is only needed to enable the standard mode for documents written using the HTML syntax. You can use the following …

  5. HTML DOCTYPE Declaration - GeeksforGeeks

    Nov 1, 2025 · It is not an HTML tag, but rather a special instruction that specifies how the browser should interpret the HTML. It is recommended to always use <!DOCTYPE html> at the top of …

  6. HTML Doctype: Syntax, Usage, and Examples

    Using the HTML doctype might not seem flashy, but it's foundational. Here are a few real-world examples of how and why it's used.

  7. HTML Document Type Declaration - W3Schools

    The HTML5 doctype declaration is concise, easy to use, reliable, and case-insensitive. In HTML5, only the doctype declaration is required to enable standards mode for web pages. Doctype …

  8. Understanding HTML Doctype: Definition, Examples

    Learn what HTML Doctype is, why it's essential, and how to use it correctly with examples and best practices for modern web development

  9. What is DOCTYPE in HTML? Explained with Examples - Intellipaat

    Oct 29, 2025 · Learn the purpose of the doctype in HTML, why it’s used, syntax, usage examples, common mistakes, and how it helps browsers correctly render your web pages.

  10. HTML: <!DOCTYPE> tag - TechOnTheNet

    This HTML tutorial explains how to use the HTML element called the !DOCTYPE tag with syntax and examples. The HTML !DOCTYPE tag tells the browser what version of HTML the …