@material/elevation
Advanced tools
Changelog
14.0.0 (2022-04-27)
unset is unsupported in IE. (f460e23)validateTooltipWithCaretDistances method. (3e30054)theme-styles mixin... the value being retreived from the $theme map and css property name was swapped. The mixin would request font-size/font-weight/letter-spacing from the $theme map (which expects size/weight/tracking)... so these values would always be null. (32b3913)attachTo. (05db65e)showTimeout is not set (indicating that this tooltip is about to be re-shown). (6ca8b8f)minRange param to range sliders to request a minimum gap between the two thumbs. (8fffcb5)valueToAriaValueTextFn and valueToValueIndicatorTextFn functions are called for. (b6510c8)PiperOrigin-RevId: 444830518
PiperOrigin-RevId: 419837612
Readme
Shadows provide important visual cues about objects’ depth and directional movement. They are the only visual cue indicating the amount of separation between surfaces. An object’s elevation determines the appearance of its shadow. The elevation values are mapped out in a "z-space" and range from 0 to 24.
A note about "z-space": Within the spec, elevation is normally referred to as having a
dpvalue. In other words, how many "pixels" above the base material is a piece of material elevated. On a computer, this is normally represented by a 3-d coordinate system. We likez-space(or just "z" for short) because it aligns with the technical definition of, and nomenclature for, a 3-d coordinate system. Therefore, we feel it makes more sense thandp. However, when we refer toz-space(orz), that can be used interchangeably with the spec'sdp.
npm install @material/elevation
Elevation is often already included within the baseline styles of other components (e.g. raised buttons, elevated cards).
However, you can also apply elevation to specific components using mdc-elevation--z<N> classes:
<div class="mdc-elevation--z1">
<!-- ... content ... -->
</div>
The elevation overlay should appear above the component container in the stacking context but below the ripple. To accomplish this, the .mdc-elevation-overlay element should appear before the .mdc-<component>__ripple element in the DOM context. Here's sample markup for a button with a touch target.
<button class="mdc-button mdc-button--raised">
<div class="mdc-elevation-overlay"></div>
<div class="mdc-button__ripple"></div>
<i class="material-icons mdc-button__icon" aria-hidden="true">favorite</i>
<span class="mdc-button__label">Font Icon</span>
</button>
This ensures the ripple parts are rendered above the overlay.
@use "@material/elevation/mdc-elevation";
Some components have a set elevation. For example, a raised MDC Button has elevation 2.
If you want to set the elevation of an element, which is not a Material Design component, you can apply the following CSS classes.
| CSS Class | Description |
|---|---|
mdc-elevation--z<N> | Sets the elevation to the (N)dp, where 1 <= N <= 24 |
mdc-elevation-transition | Applies the correct css rules to transition an element between elevations |
| Mixin | Description |
|---|---|
elevation($z-value, $color, $opacity-boost) | Sets the elevation to the z-space for that given elevation, and optionally sets the color and/or boosts the opacity of the shadow |
overlay-common | Called once per application to setup the universal elevation overlay styles |
shadow($box-shadow) | Sets the box-shadow of the closest parent selector |
overlay-surface-position | Sets the positioning of the overlay's surface element so that the overlay can be appropriately centered |
overlay-dimensions($width, $height: $width, $has-content-sizing: true) | Sets the dimensions of the elevation overlay |
overlay-fill-color($color) | Sets the color of the elevation overlay |
overlay-opacity($opacity) | Sets the opacity of the elevation overlay |
| Function | Description |
|---|---|
transition-value($duration, $easing) | Returns a value for the transition property to transition an element between elevations |
overlay-transition-value($duration, $easing) | Returns a value for the transition property to transition the elevation overlay between elevations |
elevation-box-shadow($z-value, $color, $opacity-boost) | Returns the box-shadow for the elevation z-space for that given elevation z-value, and optionally sets the color and/or boosts the opacity of the shadow |
| Variable | Description |
|---|---|
$property | Default property for elevation transitions |
$transition-duration | Default duration value for elevation transitions |
$transition-timing-function | Default easing value for elevation transitions |
$overlay-color | Default color for the elevation overlay |
$overlay-property | Default property for the elevation overlay transitions |
If you need more configurability over your transitions, use the transition-value function in conjunction with the exported sass variables.
Custom Property | Default value | Description
--- | ---
--mdc-elevation-overlay-opacity | 0 | The opacity of the elevation overlay.
--mdc-elevation-overlay-fill-color | #fff | The color of the elevation overlay
If you need more configurability over your transitions, use the transition-value function in conjunction with the exported sass variables.
@use "@material/elevation";
.my-component-with-custom-transitions {
transition:
elevation.transition-value(),
/* Configure opacity to use same duration and easing values as elevation */
opacity elevation.$transition-duration elevation.$transition-timing-function;
opacity: .7;
will-change: elevation.$property, opacity;
}
FAQs
Material Components for the web mixins + CSS Classes for Material Design elevation
The npm package @material/elevation receives a total of 849,037 weekly downloads. As such, @material/elevation popularity was classified as popular.
We found that @material/elevation demonstrated a not healthy version release cadence and project activity because the last version was released a year ago. It has 15 open source maintainers collaborating on the project.
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