HTML <dialog> Tag Definition, Usage and Example

The <dialog> HTML Tag defines a dialog box or other active components, such as an alert that can be dismissed, an inspector, or a subwindow. In order to generate popup and modal windows on a web page, the <dialog> HTML Tag is used. The open boolean attribute of the <dialog> HTML Tag activates the element and makes it easier for the user to interact with. The <dialog> HTML Tag is a new tag that was added in HTML5. The <dialog> HTML Tag is part of the Styles and Semantics HTML category in HTML Element Reference. The attributes of the <dialog> HTML Tag are open, global, and event attributes.

<dialog> code block example to learn how it works is given below.

<dialog open> Contents here... </dialog 

The second example usage of the “<dialog>” code block example is given below.

<dialog open>
<p><q>The quality of life isn't determined by how many breaths we take, but rather by the moments that leave us gasping for air.</q> - <cite>Maya Angelou</cite></p>

What is <dialog> HTML Tag

The <dialog> HTML Tag denotes a component of an application with which the user can interact to complete a task. A dialog box, an inspector, or a window are all examples of this. The <dialog> HTML Tag can be used to generate modal or pop-up windows on a website page in order to display a message or a component of the webpage. The <dialog> element contains the boolean attribute open, which makes the element “active” and enables user interaction. If this attribute is ignored, a script such as JavaScript will be essential to facilitate the dialog to open and close as necessary.

How to Use <dialog> HTML Tag?

To use the <dialog> HTML Tag, the web developer should write the <dialog></dialog> with the dialog content placed in between the start and end tags. A script can also be associated with the <dialog> HTML Tag using the id attribute, which the web developer can use.

Example Usage of <dialog> HTML Tag?

The following examples of usage of <dialog> HTML Tag are given below.

<dialog open>
  <p>Everyone, welcome!</p>
<dialog open>
<p><q>Life is what occurs while you are preoccupied with other goals.</q> - <cite>John Lennon</cite></p>

What are the Attributes of <dialog> HTML Tag?

There are multiple attributes for the <dialog> HTML Tag. The following attributes are listed below.

  • Open Attribute: The <dialog> HTML Tag supports the open attribute. This attribute indicates that the active dialog is capable of being interacted with by the user.
  • Global Attributes: The <dialog> HTML Tag supports the global attributes. All HTML elements, even those not specified in the standard, can have global attributes. This means that any non-standard elements must nevertheless allow certain characteristics, even if using such elements makes the content non-HTML5 compliant.
  • Event Attributes: The <dialog> HTML Tag supports the event attributes. The Event Attributes always have a name that begins with “on” and is followed by the name of the event for which it is intended. They specify a script to run when an event of the defined type is dispatched to the element with the specified attributes.

What is the Default CSS Setting for <dialog> HTML Tag?

The following is the Default CSS Setting for the <dialog> HTML Tag.

:root {
  --blue: #2452E5;
	--dark-blue: #113092;

dialog {
  padding: 50px;
  border-radius: 5px;
  border: 0;
	&::backdrop {
  	background: rgba(0, 0, 0, 0.4);
	&::backdrop {
		animation: show 500ms ease;

body {
	width: 100%;
	height: 100vh;
	text-align: center;
	background-color: var(--blue);

button {
	position: relative;
  top: 50%;
  transform: translateY(-50%);
	padding: 20px 45px;
	cursor: pointer;
	border-radius: 30px;
	background: #fff;
	font-size: 20px;
	border: 0;
	color: #000;
	letter-spacing: 1px;
	line-height: 1;
		background 300ms ease, 
		color 300ms ease;
	&:hover {
		background: var(--dark-blue);
		color: #fff;

h1 {
	text-align: left;
	font-size: 30px;
	font-weight: 500;
	margin-top: 0;

p {
	margin-bottom: 0;

@keyframes show {
  0% {
    opacity: 0;

What are the Related other HTML Tags to <dialog>?

The other related HTML Tags to the <dialog> HTML Tag are listed below.

  • <main> HTML Tag: The <main> HTML Tag and <dialog> HTML Tag are related because they are both style and semantics HTML Tags. It specifies the document’s primary content using the <main> HTML Tag.
  • <header> HTML Tag: The <header> HTML Tag and <dialog> HTML Tag are related because they are both style and semantics HTML Tag. The <header> HTML Tags specifies a header for a page or portion of content.
  • <details> HTML Tag: The <details> HTML Tag and <dialog> HTML Tag are related because they are both style and semantics HTML Tags. The <details> HTML Tag specifies additional information that the user can either display or hide.
  • <data> HTML Tag: The <data> HTML Tag and <dialog> HTML Tag are related because they are both style and semantics HTML Tags. Content can be translated into machine-readable form using an HTML Tag that is known as the <data> HTML Tag.
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HTML <dialog> Tag Definition, Usage and Example

by Holistic SEO time to read: 4 min