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HTML <dialog> open Attribute

❮ HTML <dialog> tag

Example

Using the <dialog> element:

<table>
<tr>
  <th>January <dialog open>This is an open dialog window</dialog></th>
  <th>February</th>
  <th>March</th>
</tr>
<tr>
  <td>31</td>
  <td>28</td>
  <td>31</td>
</tr>
</table>
Try it Yourself »

Definition and Usage

The open attribute is a boolean attribute.

When present, it specifies that the dialog element is active and that the user can interact with it.


Browser Support

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

Attribute
open 37 Not supported 59.0 6.0 24 

Differences Between HTML 4.01 and HTML5

The <dialog> tag is new in HTML5.


Differences Between HTML and XHTML

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


Syntax

<dialog open>

❮ HTML <dialog> tag