How to create a cool dotted box effect of upload buttons using CSS alone?

Pure CSS creates a cool dotted box effect of upload buttons! Say goodbye to pictures and JavaScript, you can achieve it with just CSS code! This article will demonstrate how to use CSS linear gradients to create a unique upload button style, the effect is as shown in the example image.

Many developers want to design a more attractive look for upload buttons. Traditional methods usually rely on images or complex JavaScript code, but in fact, we can easily achieve similar effects by cleverly applying the linear-gradient attributes of CSS.

The secret is to skillfully superimpose two linear gradients. By adjusting the gradient direction, size and repetition, we can simulate the visual effect of the dotted frame. The following CSS code shows the specific implementation:

 label {
  display: block;
  width: 80px;
  height: 80px;
  border: 1px dashed #ccc;
  background: linear-gradient(#ccc, #ccc) center/40px 4px no-repeat,
              linear-gradient(#ccc, #ccc) center/4px 40px no-repeat;
}

Code interpretation:

• width and height properties define the button size.
• border property sets the dotted border.
• background property is the core, which superimposes two linear gradients:
  • linear-gradient(#ccc, #ccc) center/40px 4px no-repeat : Create a short dotted line in the horizontal direction.
  • linear-gradient(#ccc, #ccc) center/4px 40px no-repeat : Create a short dotted line in the vertical direction. The two combine to form a grid-like dotted frame.
  • center/40px 4px and center/4px 40px control the size and position of the gradient, thereby accurately controlling the length and spacing of the dotted lines.

You can adjust width , height and color values ​​(such as #ccc ) as needed to customize the button size and appearance. By modifying the linear-gradient parameter, you can further fine-tune the dotted line effect, such as adjusting the thickness and spacing of the dotted line.

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