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HTML <dialog> Tag

The <dialog> tag is used to create a native dialog box, with which the user interacts, performing certain actions. For example, with this element, you can create pop-up messages or forms. By default, the dialog box is hidden from view, it is activated by the open attribute.


The <dialog> tag comes in pairs, the content is placed between the opening (<dialog>) and the closing (</dialog>) tags.

In order to display/hide the content, we need Javascript API.


<!DOCTYPE html>
    <title>Title of the document</title>
      dialog {
        width: 40%;
      <dialog id="DialogExample">
          Here is some text for example.
        <button id="hide">Close dialog text</button>
      <button id="show">Show dialog text</button>
    <script type="text/JavaScript">
      (function() {  
             var dialog = document.getElementById('DialogExample');  
             document.getElementById('show').onclick = function() { dialog.show();  
           document.getElementById('hide').onclick = function() { dialog.close();  



Attribute Value Description
open open Indicates that the dialog box is active, and the user can interact with it.

The <dialog> tag also supports the Global Attributes and the Event Attributes.

How to style <dialog> tag

Common properties to alter the visual weight/emphasis/size of text in <dialog> tag:?

  • CSS font-style property sets the style of the font. normal | italic | oblique | initial | inherit
  • CSS font-family property specifies a prioritized list of one or more font family names and/or generic family names for the selected element.
  • CSS font-size property sets the size of the font.
  • CSS font-weight property defines whether the font should be bold or thick. CSS text-transform Property controls text case and capitalization.
  • CSS text-decoration property specifies the decoration added to text, and is a shorthand property for text-decoration-line, text-decoration-color, text-decoration-style

Coloring text in <dialog> tag:

  • CSS color property describes the color of the text content and text decorations
  • CSS background-color property sets the background color of an element.

Text layout styles for <dialog> tag:

  • CSS text-indent property specifies the indentation of the first line in a text block.
  • CSS text-overflow property specifies how overflowed content that is not displayed should be signaled to the user.
  • CSS white-space property specifies how white-space inside an element is handled.
  • CSS word-break property specifies where the lines should be broken.

Other properties worth looking at for <dialog> tag

Browser support

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