首页 前端知识 px转为rem方法之插件postcss-plugin-px2rem的使用方法

px转为rem方法之插件postcss-plugin-px2rem的使用方法

2024-05-05 12:05:07 前端知识 前端哥 467 509 我要收藏

1.创建项目

①安装webpack打包工具:npm install webpack -g
②搭建vue脚手架:npm install -g vue-cli
③创建vue项目:vue init webpack "项目名称"

2.安装postcss-plugin-px2rem

npm i postcss-plugin-px2rem --save -dev

3.在.postcssrc.js文件中进行配置

module.exports = {
  "plugins": {
    "postcss-import": {},
    "postcss-url": {},
    // to edit target browsers: use "browserslist" field in package.json
    "autoprefixer": {},
    'postcss-plugin-px2rem': {
      rootValue: 16, // 设计稿宽度的 1/10
      propBlackList: ['border', 'border-top', 'border-left', 'border-right', 'border-bottom', ] // 不需要转换为 rem 单位的 CSS 属性
    }
  }
}

4.找到config文件下的index.js

'use strict'
// Template version: 1.3.1
// see http://vuejs-templates.github.io/webpack for documentation.

const path = require('path')
const Px2remWebpackPlugin = require('postcss-plugin-px2rem'); // 引入插件

module.exports = {
  dev: {

    // Paths
    assetsSubDirectory: 'static',
    assetsPublicPath: '/',
    proxyTable: {},

    // Various Dev Server settings
    host: 'localhost', // can be overwritten by process.env.HOST
    port: 8080, // can be overwritten by process.env.PORT, if port is in use, a free one will be determined
    autoOpenBrowser: false,
    errorOverlay: true,
    notifyOnErrors: true,
    poll: false, // https://webpack.js.org/configuration/dev-server/#devserver-watchoptions-


    /**
     * Source Maps
     */

    // https://webpack.js.org/configuration/devtool/#development
    devtool: 'cheap-module-eval-source-map',

    // If you have problems debugging vue-files in devtools,
    // set this to false - it *may* help
    // https://vue-loader.vuejs.org/en/options.html#cachebusting
    cacheBusting: true,

    cssSourceMap: true
  },

  build: {
    // Template for index.html
    index: path.resolve(__dirname, '../dist/index.html'),

    // Paths
    assetsRoot: path.resolve(__dirname, '../dist'),
    assetsSubDirectory: 'static',
    assetsPublicPath: '/',

    /**
     * Source Maps
     */

    productionSourceMap: true,
    // https://webpack.js.org/configuration/devtool/#production
    devtool: '#source-map',

    // Gzip off by default as many popular static hosts such as
    // Surge or Netlify already gzip all static assets for you.
    // Before setting to `true`, make sure to:
    // npm install --save-dev compression-webpack-plugin
    productionGzip: false,
    productionGzipExtensions: ['js', 'css'],

    // Run the build command with an extra argument to
    // View the bundle analyzer report after build finishes:
    // `npm run build --report`
    // Set to `true` or `false` to always turn it on or off
    bundleAnalyzerReport: process.env.npm_config_report
  },
  rules: [
    {
      test: /\.(css|less|scss)$/,
      use: [
        'style-loader',
        'css-loader',
        'postcss-loader',
        'less-loader',
      ]
    }
  ],
  plugins: [
    new Px2remWebpackPlugin({
      rootValue: 16, // 设计稿宽度的 1/10
      propBlackList: ['border', 'border-top', 'border-left', 'border-right', 'border-bottom', 'border-radius'] // 不需要转换为 rem 单位的 CSS 属性
    })
  ],
}

5.在src->utils->新建文件rem.js

// 基准大小
const baseSize = 16;
// 设置 rem 函数
function setRem() {
  // 当前页面宽度相对于 1920 宽的缩放比例,可根据自己需要修改。
  const scale = document.documentElement.clientWidth / 1920;
  // 设置页面根节点字体大小
  document.documentElement.style.fontSize =
    baseSize * Math.min(scale, 2) + "px";
}
// 初始化
setRem();
// 改变窗口大小时重新设置 rem
window.onresize = function() {
  setRem();
};

6.main.js中引入rem.js

import './utils/rem.js';

7.重启项目

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