HTML <dialog> open Attribute
Using the <dialog> element:
<th>January <dialog open>This is an open dialog window</dialog></th>
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The open attribute is currently supported only in Chrome, and Safari 6.
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.
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">.
HTML <dialog> tag
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