How Can You Create an Overlay with a Hole Using CSS?

Creating Holes in Overlays Using CSS

Question:

How can you create an overlay with a hole, allowing visibility of the underlying website content?

Answer:

Creating holes in overlays using only CSS is indeed possible. Here's how you can achieve this:

Using CSS Box-Shadow:

1. Define a new CSS class, such as .hole.
2. Set the box-shadow property for this class with a large spread radius. The spread radius defines the size of the "hole" you want to create.
3. Set appropriate positioning and dimensions for the .hole element to determine where you want to display the hole.

For example, the following CSS code creates a hole in the overlay:

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

In this code, the hole is positioned 20 pixels from the top and left edges of the overlay, with a width of 200 pixels and a height of 150 pixels. The box-shadow property creates a large shadow with a spread radius of 9999px, effectively masking the overlay and revealing the underlying content.

Code Example:

<p>Overlay content...</p>

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

<p>Underlying content...</p>

This code will display the overlay content while allowing you to see the underlying content through the "hole" defined by the .hole element.

Note:

This approach allows you to create various hole effects, ranging from simple transparent regions to more complex and visually appealing designs, enhancing user experience and adding a touch of artistry to your web applications.

The above is the detailed content of How Can You Create an Overlay with a Hole Using CSS?. For more information, please follow other related articles on the PHP Chinese website!