30秒学会 CSS 片段 – Polka dot background pattern

Creates a polka dot background pattern.

• Use background-color to set a black background.
• Use background-image with two radial-gradient() values to create two dots.
• Use background-size to specify the pattern’s size. Use background-position to appropriately place the two gradients.
• Note: The fixed height and width of the element is for demonstration purposes only.

预览

HTML

<div class="polka-dot"></div>

CSS

.polka-dot {
  width: 240px;
  height: 240px;
  background-color: #000;
  background-image: radial-gradient(#fff 10%, transparent 11%),
    radial-gradient(#fff 10%, transparent 11%);
  background-size: 60px 60px;
  background-position: 0 0, 30px 30px;
  background-repeat: repeat;
}

翻译自：https://www.30secondsofcode.org/css/s/polka-dot-pattern