Popovers

Basic stylised native HTML [popover] elements with optional opening animation styles.

Examples

Popovers have light-dismiss behaviour by default so the closing button is optional.

The quick brown fox jumps over the lazy dog.

The quick brown fox jumps over the lazy dog.

Examples HTML 
<button popovertarget="popover">Popover</button>
<div id="popover" popover>
  <p>The quick brown fox jumps over the lazy dog.</p>
</div>

<button popovertarget="pop-close">With close button</button>
<div id="pop-close" popover>
  <p>The quick brown fox jumps over the lazy dog.</p>
<button popovertarget="pop-close" popovertargetaction="hide">Close</button>
</div>

Transition

The transition animation style is optional and can be customized inline using the CSS variable --popover-transition.

The quick brown fox jumps over the lazy dog.

The quick brown fox jumps over the lazy dog.

The quick brown fox jumps over the lazy dog.

Examples HTML

The popover animation is enabled so the 'No transition' example uses the variable to remove the default .25s transition included to demonstrate default non-animated popovers.

<button popovertarget="popover-no-transition">No transition</button>
<div id="popover-no-transition" popover style="--popover-transition: 0s;">
  <p>The quick brown fox jumps over the lazy dog.</p>
</div>

<button popovertarget="popover-transition">Enabled (default .25s)</button>
<div id="popover-transition" popover>
  <p>The quick brown fox jumps over the lazy dog.</p>
</div>

<button popovertarget="popover-custom-transition">Enabled (custom 1.5s)</button>
<div id="popover-custom-transition" popover style="--popover-transition: 1.5s;">
  <p>The quick brown fox jumps over the lazy dog.</p>
</div>

Using the module

Add the sassmods.scss to your custom styles as below then include the Sass mixin(s) anywhere below.

custom.scss 
@use "sassmods/scss/sassmods" as *;
@include popovers-css;
@include popovers-animation-css;

See customizing for information about using the Sass and CSS variables in the source code (see below) to customize the styles, and Sass variables (on the using SassMods page) for other ways to use the variables to create custom styles.

Source

Source 
// ---------------------------------------------------------- 
// Popovers
// ----------------------------------------------------------
$popover-text-color:        var(--popover-text) !default;
$popover-margin-top:        var(--popover-mt, 1rem) !default;
$popover-padding-block:     var(--popover-py, 0.75rem) !default;
$popover-padding-inline:    var(--popover-px, 1rem) !default;
$popover-border-color:      var(--popover-bd-color, color-mix(in srgb, CanvasText 12%, Canvas)) !default;
$popover-radius:            var(--popover-radius, 0.125em) !default;
$popover-background-color:  var(--popover-bg, Canvas) !default; 
$popover-transition:        var(--popover-transition, 0.25s) !default;
$popover-backdrop:          color-mix(in srgb, black 50%, transparent) !default;

@mixin popovers-css {

:where([popover]) {
  color: $popover-text-color;
  block-size: fit-content;
  max-block-size: calc(100vh - 2rem);
  inline-size: calc((100% - 6px) - 2em);
  max-inline-size: var(--popover-width, fit-content);
  margin-block-start: $popover-margin-top;
  padding-block: $popover-padding-block;
  padding-inline: $popover-padding-inline;
  border: 1px solid $popover-border-color;
  border-radius: $popover-radius;
  background-color: $popover-background-color; 
  overflow: auto;
  overscroll-behavior: contain; 
}

:where([popover]) *:last-child {
  margin-block-end: 0;
}

[popover]::backdrop {
  background-color: $popover-backdrop;
}

} // end popovers-css

@mixin popovers-animation-css {

@media screen and (prefers-reduced-motion: no-preference) {
  [popover] {
    transition: $popover-transition;
    opacity: 1; 
  }
}

@starting-style {
  [popover] {
    opacity: 0;    
  }
}

}