<summary> tag is used to define the visible header for the <details> element. By clicking on the header the user can view/hide the information.
<summary> element always should be the first element inside <details> tag.
<summary> tag is new to HTML5. It is not supported by the browsers Internet explorer and Edge.
SyntaxThe content of the tag is between the opening (<summary>) and closing (</summary>) tag.
<html> <body> <details> <summary>Copyright 2013-2014.</summary> <p> W3docs. All rights reserved.</p> <p>The content of the website is the property of W3Docs.com.</p> </details> </body> </html>
Attributes of <summary> tag
<summary> tag supports Global Attributes.