之前也是看過大漠的vw適配Vue-cli，我自己寫H5，還有使用vue做項目的時候，會搭建大漠博客中的那一套。
現在在github上面，看見了一位博主使用create-react-app也是用vw適配，非常開心，現在我們一起使用vw給react適配移動端項目吧~
先放上博主大大的開源地址：https://github.com/gaohan1994/react-vw-layout
給各位無私開源的程序員們點贊，你們是最可愛的人兒。
1.創建項目
cnpm install -g create-react-app
create-react-app react-vw-layout
cd react-vw-layout
npm start
2..打開配置選項
由於react默認隱藏webpack配置需要手動顯示。
eject完的項目如下
第二步收工，第三部開始配置各種插件。
3.增加配置
安裝postCss插件
cnpm i --save postcss-aspect-ratio-mini postcss-px-to-viewport postcss-write-svg postcss-cssnext postcss-viewport-units cssnano
在config/webpack.confi.js文件中進行如下修改
1.引入postCss插件
const postcssAspectRatioMini = require('postcss-aspect-ratio-mini');
const postcssPxToViewport = require('postcss-px-to-viewport');
const postcssWriteSvg = require('postcss-write-svg');
const postcssCssnext = require('postcss-cssnext');
const postcssViewportUnits = require('postcss-viewport-units');
const cssnano = require('cssnano');
2.加入postCss配置
加入配置代碼位置如下
{
// Options for PostCSS as we reference these options twice
// Adds vendor prefixing based on your specified browser support in
// package.json
loader: require.resolve('postcss-loader'),
options: {
// Necessary for external CSS imports to work
// https://github.com/facebook/create-react-app/issues/2677
ident: 'postcss',
plugins: () => [
require('postcss-flexbugs-fixes'),
require('postcss-preset-env')({
autoprefixer: {
flexbox: 'no-2009',
},
stage: 3,
}),
// Adds PostCSS Normalize as the reset css with default options,
// so that it honors browserslist config in package.json
// which in turn let's users customize the target behavior as per their needs.
// postcssNormalize()
// 加入地點
// 加入地點
],
sourceMap: isEnvProduction && shouldUseSourceMap,
},
},
需要加入的代碼如下
postcssAspectRatioMini({}),
postcssPxToViewport({
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.
}),
postcssWriteSvg({
utf8: false
}),
postcssCssnext({}),
postcssViewportUnits({}),
cssnano({
preset: "advanced",
autoprefixer: false,
"postcss-zindex": false
})
4.測試
修改App.js
import React, { Component } from 'react';
import './App.css';
class App extends Component {
render() {
return (
<div className="App">
hello vw-layout
</div>
);
}
}
export default App;
修改App.css
.App {
width: 750px;
height: 200px;
background: #f27a7a;
color: #ffffff;
line-height: 200px;
text-align: center;
}
接下來運行項目，運行項目會報錯
解決辦法為：
cnpm i cssnano-preset-advanced --save-dev
運行項目
5.生產環境打包項目
使用npm run build報錯
解決辦法為修改package.json文件
[
"last 2 versions",
"android 4",
"opera 12"
],
接下來打包項目成功
打開static/css/main.********.css
6.加入viewport-units-buggyfill配置
打開public/index.html
首先在中引入阿里cdn
<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，加入如下js代碼：
<script>
window.onload = function () {
window.viewportUnitsBuggyfill.init({
hacks: window.viewportUnitsBuggyfillHacks
});
}
</script>
最終index.html如下
//index.html
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8" />
<link rel="shortcut icon" href="%PUBLIC_URL%/favicon.ico" />
<meta name="viewport" content="width=device-width, initial-scale=1" />
<meta name="theme-color" content="#000000" />
<meta
name="description"
content="Web site created using create-react-app"
/>
<link rel="apple-touch-icon" href="logo192.png" />
<!--
manifest.json provides metadata used when your web app is installed on a
user's mobile device or desktop. See https://developers.google.com/web/fundamentals/web-app-manifest/
-->
<link rel="manifest" href="%PUBLIC_URL%/manifest.json" />
<!--
Notice the use of %PUBLIC_URL% in the tags above.
It will be replaced with the URL of the `public` folder during the build.
Only files inside the `public` folder can be referenced from the HTML.
Unlike "/favicon.ico" or "favicon.ico", "%PUBLIC_URL%/favicon.ico" will
work correctly both with client-side routing and a non-root public URL.
Learn how to configure a non-root public URL by running `npm run build`.
-->
<title>React App</title>
<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>
</head>
<body>
<noscript>You need to enable JavaScript to run this app.</noscript>
<div id="root"></div>
<script>
window.onload = function () {
window.viewportUnitsBuggyfill.init({
hacks: window.viewportUnitsBuggyfillHacks
});
}
</script>
<!--
This HTML file is a template.
If you open it directly in the browser, you will see an empty page.
You can add webfonts, meta tags, or analytics to this file.
The build step will place the bundled scripts into the <body> tag.
To begin the development, run `npm start` or `yarn start`.
To create a production bundle, use `npm run build` or `yarn build`.
-->
</body>
</html>
重新執行npm start打開頁面發現：
如果遇到img無法顯示，則添加全局css
img {
content: normal !important;
}
這樣就適配了低版本安卓機型
7.加入css-modules配置
一般的小項目不使用css-modules已經可以hold住了，但是頁面多起來還是建議使用css-modules，下面介紹一下用法：
npm i --save react-css-modules
在App.js文件中引入插件 import CSSModules from 'react-css-modules';
修改css文件的引入方式 從import './App.css';修改為import styles from './App.css';
修改引用Css方式 className=>styleName
修改導出方式 export default App=>export default CSSModules(App, styles);
保存，從新執行npm start查看頁面發現失敗
原因是未打開css import配置，此時import styles from './App.css';該語句並未成功引入css文件。
打開webpack.config.js加入modules: true 找到如下位置
{
loader: require.resolve('css-loader'),
// options: cssOptions,
// 代碼看這里看這里
options:{
//添加添加添加
modules:true,
importLoaders:1,
}
},
保存，再次執行npm start查看頁面
是這個class名太過亂碼不適於調試，再次打開webpack.config.dev.js 找到如下位置加入語句localIdentName:'[name][local][hash:base64:5]'
{
loader: require.resolve('css-loader'),
// options: cssOptions,
// 代碼看這里看這里
options:{
//添加添加添加
modules:true,
importLoaders:1,
localIdentName: '[name]_[local]_[hash:base64:5]'
}
}
再次運行項目
我們可以看到對應的class，方便我們在項目中的調試
最后我們執行npm run build 查看打包文件
嗯，已經大功告成啦啦啦啦啦啦啦
開心，再次感謝作者大大無私的分享經驗