pengpeng in Beijing

# create-react-app构建react,使用react-app-rewired配置viewport移动端适配

# create-react-app构建react项目

# 安装 create-react-app

yarn add create-react-app

# 构建项目

create-react-app 项目名称

不使用 eject

# 使用 react-app-rewired 配置

# 安装相关依赖包

react-app-rewired@2.x需要 customize-cra

yarn add react-app-rewired customize-cra -D

# 添加相关配置文件

在根目录下创建名为 config-overrides.js 的相关配置文件,配置内容如下

const { override, fixBabelImports } = require('customize-cra');
module.exports = override();

# 修改 package.json 启动命令

"scripts": {
-    "start": "react-scripts start",
+    "start": "react-app-rewired start",
-    "build": "react-scripts build",
+    "build": "react-app-rewired build",
-    "test": "react-scripts test",
+    "test": "react-app-rewired test",
    "eject": "react-scripts eject"
  },

# 添加viewport移动端自适应方案

# 安装相关依赖包

yarn add postcss-aspect-ratio-mini postcss-px-to-viewport postcss-write-svg postcss-cssnext postcss-viewport-units cssnano cssnano-preset-advanced

# 在 config-overrides.js中添加配置

const { override} = require('customize-cra');
const rewireLess = require('react-app-rewire-less');
const addCustomize = () => config => {
  require('react-app-rewire-postcss')(config, {
        plugins: loader => [
            require('postcss-flexbugs-fixes'),
            require('postcss-preset-env')({
                autoprefixer: {
                    flexbox: 'no-2009',
                },
                stage: 3,
            }),
            require('postcss-aspect-ratio-mini')({}),
            require('postcss-px-to-viewport')({
                viewportWidth: 750, // (Number) The width of the viewport.
                viewportHeight: 1334, // (Number) The height of the viewport.
                unitPrecision: 3, // (Number) The decimal numbers to allow the REM units to grow to.
                viewportUnit: 'vw', // (String) Expected units.
                selectorBlackList: ['.ignore', '.hairlines'], // (Array) The selectors to ignore and leave as px.
                minPixelValue: 1, // (Number) Set the minimum pixel value to replace.
                mediaQuery: false // (Boolean) Allow px to be converted in media queries.
            }),
            require('postcss-write-svg')({
                utf8: false
            }),
            require('postcss-viewport-units')({}),
            require('cssnano')({
                preset: "advanced",
                autoprefixer: false,
                "postcss-zindex": false
            })
        ]
    });
  return config;
}

module.exports = override(
  addCustomize(),
);

# 引入阿里cdn

在 index.html中'

'标签添加

<script src="//g.alicdn.com/fdilab/lib3rd/viewport-units-buggyfill/0.6.2/??viewport-units-buggyfill.hacks.min.js,viewport-units-buggyfill.min.js"></script>

在body中添加 js

<script>
  window.onload = function () {
    window.viewportUnitsBuggyfill.init({
      hacks: window.viewportUnitsBuggyfillHacks
    });
  }
</script>

# 添加 less 预处理器

# 安装依赖

yarn add less less-loader

# 在 config-overrides.js 添加配置

注意: less-loader 版本6.0 之前与之后配置方式不同

可能引发一下错误:

ValidationError: Invalid options object. Less Loader has been initialized using an options object that does not match the API schema

const { override, addLessLoader } = require('customize-cra');
module.exports = override(
  addLessLoader({
    // javascriptEnabled: true, less-loader 6.0 之前
    lessOptions: {
      javascriptEnabled: true,
    },
  }),
  addCustomize(),
);