-webkit-mask-position-y

Non-standard: This feature is non-standard and is not on a standards track. Do not use it on production sites facing the Web: it will not work for every user. There may also be large incompatibilities between implementations and the behavior may change in the future.

The -webkit-mask-position-y CSS property sets the initial vertical position of a mask image.

css

/* Keyword values */
-webkit-mask-position-y: top;
-webkit-mask-position-y: center;
-webkit-mask-position-y: bottom;

/* <percentage> values */
-webkit-mask-position-y: 100%;
-webkit-mask-position-y: -50%;

/* <length> values */
-webkit-mask-position-y: 50px;
-webkit-mask-position-y: -1cm;

/* Multiple values */
-webkit-mask-position-y: 50px, 25%, -3em;

/* Global values */
-webkit-mask-position-y: inherit;
-webkit-mask-position-y: initial;
-webkit-mask-position-y: revert;
-webkit-mask-position-y: revert-layer;
-webkit-mask-position-y: unset;

Syntax

Values

<length-percentage>: A length indicating the position of the top side of the image relative to the box's top padding edge. Percentages are calculated against the vertical dimension of the box padding area. A value of 0% means the top edge of the image is aligned with the box's top padding edge and a value of 100% means the bottom edge of the image is aligned with the box's bottom padding edge.
top: Equivalent to 0%.
bottom: Equivalent to 100%.
center: Equivalent to 50%.

Formal definition

Initial value	`0%`
Applies to	all elements
Inherited	no
Percentages	refer to the size of the box itself
Computed value	for `<length>` the absolute value, otherwise a percentage
Animation type	discrete

Formal syntax

-webkit-mask-position-y =
  [ <length-percentage> | top | center | bottom ]#

Examples

Vertically positioning a mask image

css

.exampleOne {
  -webkit-mask-image: url(mask.png);
  -webkit-mask-position-y: bottom;
}

.exampleTwo {
  -webkit-mask-image: url(mask.png);
  -webkit-mask-position-y: 25%;
}

Specifications

Not part of any standard.

Browser compatibility

BCD tables only load in the browser