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postcss-px-to-viewport-ft

v1.1.3

Published

一个CSS处理器,用于将px转换为视口单位(vw、vh、vmin、vmax)

Downloads

2

Readme

postcss-px-to-viewport-ft

NPM version

将px单位转换为视口单位的 (vw, vh, vmin, vmax) 的 PostCSS 插件.

简介

搬运postcss-px-to-viewport-ft

修复了postcss.atRule is not a constructor报错的问题

如果你的样式需要做根据视口大小来调整宽度,这个脚本可以将你CSS中的px单位转化为vw,1vw等于1/100视口宽度。

输入

.class {
  margin: -10px .5vh;
  padding: 5vmin 9.5px 1px;
  border: 3px solid black;
  border-bottom-width: 1px;
  font-size: 14px;
  line-height: 20px;
}

.class2 {
  padding-top: 10px; /* px-to-viewport-ignore */
  /* px-to-viewport-ignore-next */
  padding-bottom: 10px;
  /* Any other comment */
  border: 1px solid black;
  margin-bottom: 1px;
  font-size: 20px;
  line-height: 30px;
}

@media (min-width: 750px) {
  .class3 {
    font-size: 16px;
    line-height: 22px;
  }
}

输出

.class {
  margin: -3.125vw .5vh;
  padding: 5vmin 2.96875vw 1px;
  border: 0.9375vw solid black;
  border-bottom-width: 1px;
  font-size: 4.375vw;
  line-height: 6.25vw;
}

.class2 {
  padding-top: 10px;
  padding-bottom: 10px;
  /* Any other comment */
  border: 1px solid black;
  margin-bottom: 1px;
  font-size: 6.25vw;
  line-height: 9.375vw;
}

@media (min-width: 750px) {
  .class3 {
    font-size: 16px;
    line-height: 22px;
  }
}

上手

安装

使用npm安装

$ npm install postcss-px-to-viewport-ft --save-dev

或者使用yarn进行安装

$ yarn add -D postcss-px-to-viewport-ft

配置参数

默认参数:

{
  unitToConvert: 'px',
  viewportWidth: 320,
  unitPrecision: 5,
  propList: ['*'],
  viewportUnit: 'vw',
  fontViewportUnit: 'vw',
  selectorBlackList: [],
  minPixelValue: 1,
  mediaQuery: false,
  replace: true,
  exclude: undefined,
  include: undefined,
  landscape: false,
  landscapeUnit: 'vw',
  landscapeWidth: 568
}
  • unitToConvert (String) 需要转换的单位,默认为"px"
  • viewportWidth (Number) 设计稿的视口宽度
  • unitPrecision (Number) 单位转换后保留的精度
  • propList (Array) 能转化为vw的属性列表
    • 传入特定的CSS属性;
    • 可以传入通配符""去匹配所有属性,例如:[''];
    • 在属性的前或后添加"*",可以匹配特定的属性. (例如['position'] 会匹配 background-position-y)
    • 在特定属性前加 "!",将不转换该属性的单位 . 例如: ['*', '!letter-spacing'],将不转换letter-spacing
    • "!" 和 ""可以组合使用, 例如: ['', '!font*'],将不转换font-size以及font-weight等属性
  • viewportUnit (String) 希望使用的视口单位
  • fontViewportUnit (String) 字体使用的视口单位
  • selectorBlackList (Array) 需要忽略的CSS选择器,不会转为视口单位,使用原有的px等单位。
    • 如果传入的值为字符串的话,只要选择器中含有传入值就会被匹配
      • 例如 selectorBlackList['body'] 的话, 那么 .body-class 就会被忽略
    • 如果传入的值为正则表达式的话,那么就会依据CSS选择器是否匹配该正则
      • 例如 selectorBlackList[/^body$/] , 那么 body 会被忽略,而 .body 不会
  • minPixelValue (Number) 设置最小的转换数值,如果为1的话,只有大于1的值会被转换
  • mediaQuery (Boolean) 媒体查询里的单位是否需要转换单位
  • replace (Boolean) 是否直接更换属性值,而不添加备用属性
  • exclude (Array or Regexp) 忽略某些文件夹下的文件或特定文件,例如 'node_modules' 下的文件
    • 如果值是一个正则表达式,那么匹配这个正则的文件会被忽略
    • 如果传入的值是一个数组,那么数组里的值必须为正则
  • include (Array or Regexp) 如果设置了include,那将只有匹配到的文件才会被转换,例如只转换 'src/mobile' 下的文件 (include: /\/src\/mobile\//)
    • 如果值是一个正则表达式,将包含匹配的文件,否则将排除该文件
    • 如果传入的值是一个数组,那么数组里的值必须为正则
  • landscape (Boolean) 是否添加根据 landscapeWidth 生成的媒体查询条件 @media (orientation: landscape)
  • landscapeUnit (String) 横屏时使用的单位
  • landscapeWidth (Number) 横屏时使用的视口宽度

excludeinclude是可以一起设置的,将取两者规则的交集。

Ignoring (需要翻译帮助。)

You can use special comments for ignore conversion of single lines:

  • /* px-to-viewport-ignore-next */ — on a separate line, prevents conversion on the next line.
  • /* px-to-viewport-ignore */ — after the property on the right, prevents conversion on the same line.

Example:

/* example input: */
.class {
  /* px-to-viewport-ignore-next */
  width: 10px;
  padding: 10px;
  height: 10px; /* px-to-viewport-ignore */
  border: solid 2px #000; /* px-to-viewport-ignore */
}

/* example output: */
.class {
  width: 10px;
  padding: 3.125vw;
  height: 10px;
  border: solid 2px #000;
}

There are several more reasons why your pixels may not convert, the following options may affect this: propList, selectorBlackList, minPixelValue, mediaQuery, exclude, include.

使用PostCss配置文件时

postcss.config.js添加如下配置

module.exports = {
  plugins: {
    // ...
    'postcss-px-to-viewport-ft': {
      // options
    }
  }
}

直接在gulp中使用,添加gulp-postcss

gulpfile.js 添加如下配置:

var gulp = require('gulp');
var postcss = require('gulp-postcss');
var pxtoviewport = require('postcss-px-to-viewport-ft');

gulp.task('css', function () {

    var processors = [
        pxtoviewport({
            viewportWidth: 320,
            viewportUnit: 'vmin'
        })
    ];

    return gulp.src(['build/css/**/*.css'])
        .pipe(postcss(processors))
        .pipe(gulp.dest('build/css'));
});

参与贡献

在提PR之前,请先阅读 代码指南贡献指南

测试

为了跑测试案例,您需要安装开发套件:

$ npm install

然后输入下面的命令:

$ npm run test

Changelog

变更日志在 .

版本跟踪

使用 SemVer 做版本跟踪, 可用版本可在看到

作者

contributors 里可以看到谁参与了本项目.

许可

本项目使用 MIT License.