Postcss-pxtransform NPM

PostCSS Pxtransform

PostCSS 插件，目前已支持 px 转小程序 rpx 及 h5 rem 单位。

Install

$ npm install postcss-pxtransform --save-dev

Usage

options = {
    platform: 'weapp',
    designWidth: 750,
}

options = {
    platform: 'h5',
    designWidth: 750,
}

默认配置下，所有的 px 都会被转换。

/* input */
h1 {
    margin: 0 0 20px;
    font-size: 32px;
    line-height: 1.2;
    letter-spacing: 1px;
}

/* weapp output */
h1 {
    margin: 0 0 20rpx;
    font-size: 40rpx;
    line-height: 1.2;
    letter-spacing: 1rpx;
}

/* h5 output */
h1 {
    margin: 0 0 0.5rem;
    font-size: 1rem;
    line-height: 1.2;
    letter-spacing: 0.025rem;
}

var fs = require('fs');
var postcss = require('postcss');
var pxtorem = require('postcss-pxtransform');
var css = fs.readFileSync('main.css', 'utf8');
var options = {
    replace: false
};
var processedCss = postcss(pxtorem(options)).process(css).css;

fs.writeFile('main-rem.css', processedCss, function (err) {
  if (err) {
    throw err;
  }
  console.log('Rem file written.');
});

配置 options

{
    unitPrecision: 5,
    propList: ['*'],
    selectorBlackList: [],
    replace: true,
    mediaQuery: false,
    minPixelValue: 0
}

Type: Object | Null

weapp 或 h5

640 或 750 或 828

The decimal numbers to allow the REM units to grow to.

The properties that can change from px to rem.

Values need to be exact matches.
Use wildcard * to enable all properties. Example: ['*']
Use * at the start or end of a word. (['*position*'] will match background-position-y)
Use ! to not match a property. Example: ['*', '!letter-spacing']
Combine the "not" prefix with the other prefixes. Example: ['*', '!font*']

(Array) The selectors to ignore and leave as px.

If value is string, it checks to see if selector contains the string.
- ['body'] will match .body-class
If value is regexp, it checks to see if the selector matches the regexp.
- [/^body$/] will match body but not .body

replaces rules containing rems instead of adding fallbacks.

Allow px to be converted in media queries.

Set the minimum pixel value to replace.

忽略

当前忽略单个属性的最简单的方法，就是 px 单位使用大写字母。

 /*`px` is converted to `rem`*/
.convert {
    font-size: 16px; // converted to 1rem
}

 /* `Px` or `PX` is ignored by `postcss-pxtorem` but still accepted by browsers*/
.ignore {
    border: 1Px solid; // ignored
    border-width: 2PX; // ignored
}

对于头部包含注释/*postcss-pxtransform disable*/ 的文件，插件不予处理。

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