在UnoCSS中定义1PX边框语法规则

Aitter2024-10-23 12:28

在项目中使用UnoCSS时，实现移动端1px精细边框适配

适配规则定义：

1bdr 四边框
1bdr-t 上边框
1bdr-b 下边框
1bdr-l 左边框
1bdr-r 右边框

要实现上面的规则，可以unocss中自定义规则 unocss 规则

在 uno.config.ts 中定义 rules

js 复制代码

import {
  type Preset,
  defineConfig,
  toEscapedSelector,
} from 'unocss'

export default defineConfig({
    ...
    rules: [
     [
      /^1bdr(-[t|b|r|l])?$/,
      ([, poi], { rawSelector }) => {
        const color = 'rgba(0, 0, 0, 0.15)'
        const positions = ['-top', '-bottom', '-right', '-left']
        const pos = positions.find((v) => v.startsWith(poi))
        const bdr = `border${pos}: 1px solid ${color};`
        // console.log(poi, bdr)

        const selector = toEscapedSelector(rawSelector)
        return `
          ${selector} {
            position: relative;
          }
          ${selector}::after {
            content: " ";
            position: absolute;
            width: 200%;
            height: 200%;
            top: 0;
            left: 0;
            ${bdr}
            transform: scale(0.5);
            transform-origin: 0 0;
            pointer-events: none;
            border-radius: inherit;
          }
        `
      },
    ],
   ]
   ...
})

使用

html 复制代码

// 可适配 border-radius
<div class="1bdr rounded-2 p-2 m-2"></div>

<div class="1bdr-b p-2 m-2"></div>