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HTML <details> open Attribute

HTML details Tag Reference HTML <details> tag

Example

An open/visible <details> element:

<details open>
  <summary>Copyright 1999-2014.</summary>
  <p> - by Refsnes Data. All Rights Reserved.</p>
  <p>All content and graphics on this web site are the property of the company Refsnes Data.</p>
</details>

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Definition and Usage

The open attribute is a boolean attribute.

When present, it specifies that the details should be visible (open) to the user.


Browser Support

The numbers in the table specify the first browser version that fully supports the attribute.

Attribute
open 12.0 Not supported Not supported 6.0 15.0


Differences Between HTML 4.01 and HTML5

The <details> tag is new in HTML5.


Differences Between HTML and XHTML

In XHTML, attribute minimization is forbidden, and the open attribute must be defined as <details open="open">.


Syntax

<details open>


HTML details Tag Reference HTML <details> tag

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