CSS Masking - mask-image



CSS mask-image property in CSS is used to set the mask image for an element. A mask image defines which parts of an element are visible and which are transparent, allowing you to create complex visual effects. The areas of the element where the mask image is transparent will be fully transparent, and the areas where it is opaque will be fully visible.

Possible Values

  • none − Default value. The element does not have a mask image applied to it.

  • <mask-source> − An image can be accessed by a URL reference or an SVG <mask> element.

  • <image> − Define mask image layer using image().

Applies to

All elements. In SVG, it applies to container elements excluding the <defs> element and all graphics elements

Syntax

Keyword Values

mask-image: none;

<mask-source> Values

   mask-image: url(bookmark.png);

<image> Values

mask-image: linear-gradient(rgba(0, 0, 0, 1), transparent);
mask-image: image(url(bookmark.png), skyblue);

CSS mask-image - none Value

The following example demonstrates that -webkit-mask-image: none property does not apply any masking effect −

<html>
<head>
<style>
   .masking-image {
      width: 300px;
      height: 200px;
      background-color: green;

      -webkit-mask-image: url('images/bookmark.png');
      mask-image:url('images/bookmark.png');
      -webkit-mask-size: 100% 100%;
      mask-size: 100% 100%;
      -webkit-mask-repeat: no-repeat;
      mask-repeat: no-repeat;
      -webkit-mask-position: center;
      mask-position: center;
   }
</style>
</head>
<body>
      <h2>With Mask Image</h2>
   <div class="masking-image"></div><br>
   <h2>With Mask Image Set To none Value</h2>
   <div class="masking-image" style="-webkit-mask-image:none;mask-image:none;"></div>
</body>
</html>

CSS mask-image - <mask-source>

The following example demonstrates the use of -webkit-mask-image: url() property , where the given image of a pink flower is visible only within the shape defined by the mask image −

<html>
<head>
<style>
   .masking-image {
      width: 300px;
      height: 300px;

      background-image: url('images/pink-flower.jpg');
      background-size:  cover;
      background-position: center;
      background-repeat: no-repeat;

      -webkit-mask-image: url('images/bookmark.png');
      -webkit-mask-size: 100% 100%;
      -webkit-mask-repeat: no-repeat;
      -webkit-mask-position: center;
      mask-image: url('images/bookmark.png');
      mask-size: 100% 100%;
      mask-repeat: no-repeat;
      mask-position: center;
   }
</style>
</head>
<body>
   <div class="masking-image"></div>
</body>
</html>

CSS mask-image - <image>

The following example demonstrates that the -webkit-mask-image: linear-gradient(rgba(0, 0, 0, 1), transparent) property applies a linear gradient as a mask −

<html>
<head>
<style>
   .masking-image {
      width: 500px;
      height: 300px;

      background-image: url('images/red-flower.jpg');
      background-size:  cover;
      background-position: center;
      background-repeat: no-repeat;

      -webkit-mask-image: linear-gradient(rgba(0, 0, 0, 1), transparent);
      -webkit-mask-size: 100% 100%;
      -webkit-mask-repeat: no-repeat;
      -webkit-mask-position: center;
      mask-image: linear-gradient(rgba(0, 0, 0, 1), transparent);
      mask-size: 100% 100%;
      mask-repeat: no-repeat;
      mask-position: center;
   }
</style>
</head>
<body>
   <div class="masking-image"></div>
</body>
</html>
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