CSS > les masques

mask-image définit l’image qui sera utilisée comme masque pour un élément.

 

mask-image: none; // Valeur avec un mot-clé
mask-image: url(masks.svg#mask1); // Valeur de type <mask-source>

/* Valeurs de type <image> */
mask-image: linear-gradient(rgba(0, 0, 0, 1.0), transparent);
mask-image: image(url(mask.png), skyblue);

/* Gestion de plusieurs masques */
mask-image: image(url(mask.png), skyblue, linear-gradient(rgba(0, 0, 0, 1.0), transparent);

/* Valeurs globales */
mask-image: inherit;
mask-image: initial;
mask-image: unset;

Valeurs

none Le masque défini par ce mot-clé sera une image noire transparente.

<mask-source> Une référence <url> vers un masque (<mask>) ou une image CSS.

<image> Une image utilisée pour le masque.

Syntaxe formelle

<mask-reference>#
où
<mask-reference> = none | <image> | <mask-source>
où
<image> = <url> | <image()> | <image-set()> | <element()> | <paint()> | <cross-fade()> | <gradient>
<mask-source> = <url>
où
<image()> = image( <image-tags>? [ <image-src>? , <color>? ]! )
<image-set()> = image-set( <image-set-option># )
<element()> = element( <id-selector> )
<paint()> = paint( <ident>, <declaration-value>? )
<cross-fade()> = cross-fade( <cf-mixing-image> , <cf-final-image>? )
gradient = linear-gradient(),repeating-linear-gradient(),radial-gradient(),repeating-radial-gradient(),conic-gradient()>
où
<image-tags> = ltr | rtl
<image-src> = <url> | <string>
<color> = <rgb()> | <rgba()> | <hsl()> | <hsla()> | <hex-color>
<image-set-option> = [ <image> | <string> ] <resolution>
<id-selector> = <hash-token>
<cf-mixing-image> = <percentage>? && <image>
<cf-final-image> = <image> | <color>
<linear-gradient()> = linear-gradient( [ <angle> | to <side-or-corner> ]? , <color-stop-list> )
<repeating-linear-gradient()> = <angle> | to <side-or-corner> ]? , <color-stop-list> )
<radial-gradient()> =
<repeating-radial-gradient()> = || <si<position>,color-stop-list> )
<conic-gradient()> = conic-gradient( [ from <angle> ]? [ at <position> ]?, <angular-color-stop-list> )

où
<rgb()> = rgb( 45 [ / <alpha-value> ]? ) | rgb( 81 [ / <alpha-value>? )
<rgba()> = rgba( )
<hsl()> = hsl( <hue> <percentage> <percentage> [ / <alpha-value> ]? ) |<alpha-value>? )
<hsla()> = hsla( <hue> <percentage> <percentage> [ / <alpha-value>? )
<side-or-corner> = [ left | right ] || [ top | bottom ]
<color-stop-list> = [ <linear-color-stop> [, <linear-color-hint>]? ]# , <linear-color-stop>
<ending-shape> = circle | ellipse
<size> = taille
<position> = position (left|center|right,percentage)
<angular-color-stop-list> = [ <angular-color-stop> [, <angular-color-hint>]? ]# , <angular-color-stop>

où
<alpha-value> = <number> | <percentage>
<hue> = <number> | <angle>
<linear-color-stop> = <color> <color-stop-length>?
<linear-color-hint> = <length-percentage>
<length-percentage> = <length> | <percentage>
<angular-color-stop> = <color> && <color-stop-angle>?
<angular-color-hint> = <angle-percentage>

où
<color-stop-length> = <length-percentage>{1,2}
<color-stop-angle> = <angle-percentage>{1,2}
<angle-percentage> = <angle> | <percentage>

Exemples

#masked {
  width: 100px;
  height: 100px;
  background-color: #8cffa0;
  mask-image: url(https://mdn.mozillademos.org/files/12676/star.svg);
}

<div id="masked"></div>

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