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The HTML <dialog> element is used when you want to create a modal or dialog box that overlays the main content of a web page.

You might use it to display additional information, capture user input, or present important messages or alerts.

Here are some example scenarios where you might consider using a <dialog> element:

  • User interactions: If you need to prompt the user for input or confirmation, such as submitting a form, deleting a record, or confirming an action, a dialog box can provide a clear and focused prompt that captures attention quickly.
  • Information display: When you have supplementary information that you want to present without navigating away from the current page, a dialog box can be used to provide context-specific details, instructions, or additional content.
  • Error or warning messages: In cases where you need to notify the user about errors, warnings, or important notifications, a dialog box can grab their attention and make sure they acknowledge the message before proceeding.
  • Interactive content: If you have interactive content like maps, charts, or multimedia elements that require user interaction or customization, a dialog box can serve as a dedicated space to present and interact with that type of content.


<dialog open>
  <!-- Dialog content -->

The open attribute is optional and can indicate that the dialog should be visible by default when the page loads.


Here’s an interactive example of how to use the <dialog> element:

In this example, a button triggers the opening of the dialog when clicked which requires some JavaScript code. The dialog contains content and a close button that allows the user to close the dialog.


The <dialog> tag supports Global Attributes in HTML. Global Attributes are common to all HTML elements and can be used on all of them (though they may not have much effect on some of them).

The <dialog> element also supports the open attribute.

  • open: Specifies that the dialog should be visible when the page loads. This attribute can be dynamically changed using JavaScript, as we’ve done in the example above, to control the visibility of the dialog.


The <dialog> element can contain HTML content like text, images, buttons, forms, and more.

Did You Know?

  • <dialog> is classified as a “sectioning root”, similar to the <body>, <blockquote>, and the <details> elements, each of which establishes a new content section independently.

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