index.md

---

title: "-webkit-mask-position-y"
slug: Web/CSS/-webkit-mask-position-y
page-type: css-property
status:
  - non-standard
browser-compat: css.properties.-webkit-mask-position-y

---

{{CSSRef}}{{Non-standard_header}}

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

/* 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: unset;

{{cssinfo}}

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

{{CSSInfo}}

Formal syntax

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

Examples

Vertically positioning a mask image

.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

{{Compat}}

See also

{{cssxref("-webkit-mask-position")}}, {{cssxref("-webkit-mask-position-x")}}, {{cssxref("-webkit-mask-origin")}}, {{cssxref("-webkit-mask-attachment")}}