CSS - -webkit-mask-position-y

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

Example

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

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

Syntax  

/* 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 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;

Description  

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

Initial value0%
Applies toall elements
Inheritedno
Percentagesrefer to the size of the box itself
Mediavisual
Computed valuefor <length> the absolute value, otherwise a percentage
Animation typediscrete
Canonical orderorder of appearance in the formal grammar of the values

Browser Compatibility  

Feature Chrome Firefox (Gecko) Internet Explorer Opera Safari (WebKit)
Basic support 1.0 No support No support No support 4.0
Feature Android Firefox Mobile (Gecko) IE Phone Opera Mobile Safari Mobile
Basic support ? No support No support No support ?

See Also  

-webkit-mask-position, -webkit-mask-position-x, -webkit-mask-origin, -webkit-mask-attachment

Specifications  

Not part of any specification.

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 syntax

[ <length-percentage> | top  | center | bottom ]#

where
<length-percentage> = <length> | <percentage>

License

© 2016 Mozilla Contributors
Licensed under the Creative Commons Attribution-ShareAlike License v2.5 or later.
https://developer.mozilla.org/en-us/docs/web/css/-webkit-mask-position-y