HTML open Attribute

Example

<details open>
	<summary>HTML</summary>
	<p>The HyperText Markup Language, or HTML is the standard markup language for documents designed to be displayed in a web browser.</p>
</details>

Meaning

The open attribute specifies whether details/dialog should be shown to the user.

Standard Syntax

HTML: <element open>
XHTML: <element open="open">

Browser Support

Status

Applies to:

The open attribute can be used on the following element:

Element	Attribute
<details>	open
<dialog>	open

Attribute Values

Value	Description
open	This is a boolean attribute, the presence of a boolean attribute on an element represents the true value, and the absence of the attribute represents the false value.

More Examples

Example

<dialog open>This is an open dialog box</dialog>

❮ HTML Attributes