<header>: The Header element
Baseline Widely available
This feature is well established and works across many devices and browser versions. It’s been available across browsers since July 2015.
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 author name, and other elements.
Try it
<header>
  <a class="logo" href="#">Cute Puppies Express!</a>
</header>
<article>
  <header>
    <h1>Beagles</h1>
    <time>08.12.2014</time>
  </header>
  <p>
    I love beagles <em>so</em> much! Like, really, a lot. They’re adorable and
    their ears are so, so snugly soft!
  </p>
</article>
.logo {
  background: left / cover
    url("/shared-assets/images/examples/puppy-header.jpg");
  display: flex;
  height: 120px;
  align-items: center;
  justify-content: center;
  font:
    bold calc(1em + 2 * (100vw - 120px) / 100) "Dancing Script",
    fantasy;
  color: #ff0083;
  text-shadow: #000 2px 2px 0.2rem;
}
header > h1 {
  margin-bottom: 0;
}
header > time {
  font: italic 0.7rem sans-serif;
}
Usage notes
The <header> element has an identical meaning to the site-wide banner landmark role, unless nested within sectioning content. Then, the <header> element is not a landmark.
The <header> element can define a global site header, described as a banner in the accessibility tree. It usually includes a logo, company name, search feature, and possibly the global navigation or a slogan. It is generally located at the top of the page.
Otherwise, it is a section in the accessibility tree, and usually contains the surrounding section's heading (an h1 – h6 element) and optional subheading, but this is not required.
Historical Usage
The <header> element originally existed at the very beginning of HTML for headings. It is seen in the very first website. At some point, headings became <h1> through <h6>, allowing <header> to be free to fill a different role.
Attributes
This element only includes the global attributes.
Accessibility
Examples
Page Header
<header>
  <h1>Main Page Title</h1>
  <img src="mdn-logo-sm.png" alt="MDN logo" />
</header>
Result
Article Header
<article>
  <header>
    <h2>The Planet Earth</h2>
    <p>
      Posted on Wednesday, <time datetime="2017-10-04">4 October 2017</time> by
      Jane Smith
    </p>
  </header>
  <p>
    We live on a planet that's blue and green, with so many things still unseen.
  </p>
  <p><a href="https://example.com/the-planet-earth/">Continue reading…</a></p>
</article>
Result
Technical summary
| Content categories | Flow content, palpable content. | 
|---|---|
| Permitted content | Flow content, but with no <header>or<footer>descendant. | 
| Tag omission | None, both the starting and ending tag are mandatory. | 
| Permitted parents | Any element that accepts
        flow content. Note that a <header>element must not be a
        descendant of an<address>,<footer>or another<header>element. | 
| Implicit ARIA role | banner, or
        generic
        if a descendant of an article,aside,main,navorsectionelement, or an element witharticle,complementary,main,navigationorregionrole | 
| Permitted ARIA roles | group,presentationornone | 
| DOM interface | HTMLElement | 
Specifications
| Specification | 
|---|
| HTML # the-header-element | 

 
                       
                
                       
			     
			