Monday, April 15, 2024
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HTML popover Attribute


Modals have been an essential a part of web sites for 20 years. Stacking contents and utilizing fetch to perform duties are an effective way to enhance UX on each desktop and cellular. Sadly most builders do not know that the HTML and JavaScript specs have carried out a local modal system by way of the popover attribute — let’s test it out!

The HTML

Making a native HTML modal consists of utilizing the popovertarget attribute because the set off and the popover attribute, paired with an id, to establish the content material factor:

<!-- 
  "popovertarget" attribute will map to "id" of popover contents
-->
<button popovertarget="popover-contents">Open popover</button>
<div id="popover-contents" popover>That is the contents of the popover</div>

Upon clicking the button, the popover will open. The popover, nonetheless, is not going to have a conventional background layer colour so we’ll have to implement that on our personal with some CSS magic.

The CSS

Styling the contents of the popover content material is fairly normal however we are able to use the browser stylesheet selector’s pseudo-selector to fashion the “background” of the modal:

/* contents of the popover */
[popover] {
  background: lightblue;
  padding: 20px;
}

/* the dialog's "modal" background */
[popover]:-internal-popover-in-top-layer::backdrop {
  background: rgba(0, 0, 0, .5);  
}

:-internal-popover-in-top-layer::backdrop represents the “background” of the modal. Historically that UI has been a component with opacity such to point out the stacking relationship.

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