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

Cleverly use CSS Mask to achieve the gap effect under the background of card coupon gradient

When designing a coupon, especially against a gradient background, how to make a delicate notch effect is often a headache. This article will explain in detail how to use mask attribute of CSS to easily achieve this effect and provide actionable examples.

Challenge: The gap puzzle under the gradient background

Many users want to add notch elements to their coupon designs to enhance visual appeal. If the background color is solid, it can be easily achieved by directly covering a block of the same color. However, this method fails when the background is gradient. Therefore, a more flexible and versatile solution is needed.

Solution: The wonderful use of CSS Mask attributes

mask attribute is the key to solving this problem. It allows us to create mask layers, which allows precise control of the display area of ​​the element. By cleverly using mask , the effect of card voucher gap can be easily achieved even under a gradient background.

Here is a clean CSS code example that demonstrates how to create a gap in the upper left corner using mask property:

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

This code uses radial-gradient to create a circular gradient mask. transparent 20px, #000 0 defines gradient colors, where transparent means transparent means transparent and #000 means black (completely opaque). 20px represents the radius of the gradient, controlling the size of the gap. circle at 20px 20px specifies the center point of the gradient, that is, the location of the gap.

Through this method, the gap effect can be accurately displayed regardless of the gradient color of the card background.

In order to design and adjust the gap effect more easily, it is recommended to use online design tools to assist in generating and previewing the mask effect and quickly find the ideal style and parameters.

Summary: Through the CSS mask attribute, we can easily achieve various gap effects on card vouchers on gradient backgrounds. This technology is also suitable for other scenarios that require similar visual effects.

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