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  1. <header>: The Header element - HTML | MDN - MDN Web Docs

    The <header> HTML element represents introductory content, typically a group of introductory or navigational aids. It may contain some heading elements but also a logo, a search form, an …

  2. HTML header Tag - W3Schools

    Definition and Usage The <header> element represents a container for introductory content or a set of navigational links. A <header> element typically contains: one or more heading elements …

  3. Email Header Analyzer, RFC822 Parser - MxToolbox

    ABOUT EMAIL HEADERS This tool will make email headers human readable by parsing them according to RFC 822. Email headers are present on every email you receive via the Internet …

  4. Header Tags: A Simple (But Complete) Guide To H1, H2 and H3 …

    2025年12月30日 · In this new guide, you’ll learn exactly how to use H1 to H6 tags to drive higher search engine rankings, even if you’re new to SEO header tags, or, gotten tricked (by Google) …

  5. HEADER Definition & Meaning - Merriam-Webster

    The meaning of HEADER is one that removes heads; especially : a grain-harvesting machine that cuts off the grain heads and elevates them to a wagon. How to use header in a sentence.

  6. Header | U.S. Web Design System (USWDS)

    Use the basic header if you have few enough sections in your main navigation to fit comfortably next to your logo; this decision will depend on the length of your text and whether you include a …

  7. HTML header Tag - GeeksforGeeks

    2025年7月28日 · Keep it clear: The <header> tag should contain introductory content. It’s not meant to hold all content; its purpose is to help introduce or navigate the content.

  8. What Is a Header? - Computer Hope

    2025年11月2日 · A header is text at the top of a page in an electronic document or hard copy. For example, in Microsoft Word, a header could be created in a document to display the page …

  9. HTML <header> Tag - W3docs

    The <header> tag defines a header of a page or a section. Tag description, attributes and using examples.

  10. Header - Wikipedia

    Header (computing), supplemental data at the beginning of a data block E-mail header HTTP header Header file, a text file used in computer programming (especially in C and C++) A pin …