How to Create Holes in CSS Overlays?

Creating Holes in CSS Overlays

It is possible to create an effect that leaves a hole in an overlay, allowing content beneath to show through.

Using CSS Box Shadow

To achieve this effect, use the CSS box-shadow property with a large spread radius.

box-shadow: 0 0 0 9999px rgba(0, 0, 255, 0.2);

This creates a large, translucent shadow around the element.

Example

In the following example, a "hole" is created in the overlay div with the hole class:

.hole {
  position: absolute;
  top: 20px;
  left: 20px;
  width: 200px;
  height: 150px;
  box-shadow: 0 0 0 9999px rgba(0, 0, 255, 0.2);
}

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<div class="hole"></div>

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