How to achieve the gap effect in card and coupon layout under a gradient background?

Cleverly realize the gap effect under the background of the card coupon gradient

How to gracefully handle the notch effect on the edges, especially when facing a gradient background, is a common challenge when designing a coupon. This article will provide a solution based on CSS mask attributes to help you achieve this effect easily.

Challenge: The gap puzzle under the gradient background

If the card voucher background is solid color, simply superimpose a block of the same color to block the gap. But for gradient backgrounds, this method obviously fails. How can we accurately create gaps while maintaining the gradient effect?

Solution: Take advantage of CSS mask attributes

The CSS mask attribute provides a powerful image masking function. We can skillfully use radial gradients to create transparent areas, thus “diging” gaps on the gradient background. Here is a sample code:

 .card {
  -webkit-mask: radial-gradient(circle at 20px 20px, transparent 20px, #000 0); /* Safari and Chrome */
  mask: radial-gradient(circle at 20px 20px, transparent 20px, #000 0); /* Other browsers */
}

This code uses radial gradients to create a circular mask centered on (20px, 20px). The area within the radius of 20px is transparent, and the rest is opaque, thus forming a circular notch in the upper left corner of the coupon. You can adjust the coordinates in circle at parameter and the radius of the transparent part to control the position and size of the notch.

Effect display

The following figure shows the effect of the card coupon gap achieved by this method:

Advanced and expansion

For more flexible control of notch shape and position, you can explore other types of gradients, overlays of multiple mask , and advanced technologies such as SVG masks.

In addition, some online tools can help you generate more complex card coupon effects:

• Online tools: Coupon Generator (please replace https://www.php.cn/link/0cad5adfb5b36b908b4bfe0e47371e3b as the actual link)

By rationally using the CSS mask attributes, you can easily achieve various fine card voucher gap effects under a gradient background, improving your design efficiency.

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