CSS: how to customize the styles of the backdrop of the dialog element

  • CSS
  • Gabriele Romanato

The backdrop of an HTML5 dialog element is the dimmed background that appears when the dialog element is open. You can customize the style of the backdrop using the background-color and opacity CSS properties.

To set the background color of the backdrop, you can use the background-color property along with the dialog::backdrop pseudo-element. For example, to set the background color of the backdrop to dark gray, you could write:


 dialog::backdrop {
  background-color: rgba(0, 0, 0, 0.5);
}

To set the opacity of the backdrop, you can use the opacity property. For example, to set an opacity of 70%, you could write:


dialog::backdrop {
  opacity: 0.7;
}

Alternatively, you can use the background-color CSS property with an opacity value to create a transparent backdrop effect. For example:


dialog::backdrop {
  background-color: rgba(0, 0, 0, 0.5);
}

In conclusion, customizing the backdrop style of an HTML5 dialog element is easy with the background-color and opacity CSS properties. Use these properties to create a backdrop effect that fits suitable for the design of your website or application.

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