安装Node.js
如果你还不知道什么是ECMAScript
,请点击这里
如果你还不知道什么是Node.js
,请点击这里
下载Node.js并安装;接着打开windows
命令行窗口分别输入node -v
及npm -v
如下图所示,node
和npm
均显示出版本号则表示安装成功!
npm初始化项目
如果你还不知道什么是npm
,请点击这里
在你想要放置该项目代码的任何地方新建一个文件夹,并命名为react-template
,接着打开该文件夹路径下windows
命令行窗口输入npm init
,接着根据提示依次输入:
-
package name
:项目名称(默认是文件夹名称) -
version
:版本号(默认是1.0.0) -
description
:项目描述 -
entry point
:项目入口文件(默认是index.js) -
test command
:测试命令 -
git repository
:git
远程仓库地址 -
keywords
:项目关键词 -
author
:作者 -
license
:开源许可声明
初始化完成后,项目根目录会自动生成package.json
文件,这就是项目的npm
配置文件了。
使用webpack4搭建自动化开发环境
如果你还不知道什么是webpack
,请点击这里,并且本人强烈建议把该页内容耐心读完。
webpack
是一个静态资源模块打包器,并且webpack
支持多种不同的模块系统,我们主要用到以下三个:
- es6模块系统
- node平台的CommonJS模块系统
- sass/less的模块系统
一、使用npm安装webpack
首先,给package.json
文件写入两个属性:
这两个属性都是用来维护项目的本地依赖包列表的,但是devDependencies
比较特殊,它只是开发环境的依赖,当构建生产环境代码时,这些包的代码会被舍去。
接着,给devDependencies
写入webpack
的依赖:
键值对:key
为包名,value
为版本号
{
...
"devDependencies": {
"webpack": "^4.12.0",
"webpack-cli": "^3.0.8"
...
}
}
命令行npm install
或npm i
,这个命令会根据dependencies
和devDependencies
的配置去检查是否所有的依赖包都在本地安装了,若没有则会安装对应的包到本地。
如果你对npm
命令行不了解,可以看这里
如果你对npm
的“全局”和“本地”的概念不是很清楚,例如:上文提到的本地依赖包,可以看这里
安装成功后,项目根目录下会生成一个node_modules
文件夹,它就是本地依赖包的仓库,你可以在它的里面找到包webpack
和webpack-cli
。
特别地,还需要全局安装webpack
,否则命令行窗口认不到 webpack 的命令。
$ npm i -g webpack webpack-cli
二、编写webpack4配置文件
新建react-template/src
文件夹,并在里面新建文件index.js
新建react-template/build
文件夹,接着在build
文件夹里再新建两个文件:
-
webpack.base.js
:基础配置文件(开发和生产共用) -
webpack.dev.js
:自动化开发环境的配置文件 -
webpack.pro.js
:构建生产环境代码配置文件
关于webpack
配置的详细内容,请看这里
webpack基础配置
配置文件通常是一个CommonJS
规范的模块,输出一个JavaScript Object
entry
// __dirname表示当前目录,path.resolve()可以防止不同操作系统之间的文件路径问题,并且可以使相对路径按照预期工作
module.exports = {
/**
* 项目入口文件
*/
entry: path.resolve(__dirname, '../src/index.js')
// ...省略其它选项
}
output
module.exports = {
//...
/**
* 指定打包后的 bundle 如何输出
* 特别说明:
* 1. bundle是指多个模块打包在一起,产生的新文件。bundle 一般由html文件通过 script 标签加载
*/
output: {
// 打包后的 bundle 的生成位置(E:/react-template/dist/)
path: path.resolve(__dirname, "../dist/"),
// 主 bundle(E:/react-template/dist/js/main.js)
filename: "js/main.js",
// chunk: 单独拆分出来的 bundle,name即为chunk的名称
chunkFilename: "js/[name].js",
// publicPath + chunkFilename 为打包后生成的html文件请求 chunkFile 的路径
// publicPath + 图片的URL 为打包后生成的html文件请求图片的路径,其他静态资源文件同理
publicPath: "/"
}
//...
}
resolve
module.exports = {
//...
/**
* 如何解析模块路径
*/
resolve: {
// 指定要解析的文件扩展名
extensions: [".web.js", ".jsx", ".js", ".json"],
// 模块路径别名
alias: {}
},
//...
}
module
module.exports = {
//...
/**
* 指定如何处理(编译)各种类型的模块
* 特别说明:
* 1. webpack提供了丰富的针对不同类型模块的loader,你可以使用loader对模块进行预处理或者对模块的 * 源代码进行转换(编译)
* 2. 常见的模块类型:js, jsx, css, scss, less, json, png, git, jpg
*/
module: {
/**
* 各种类型模块的处理规则
* 特别说明:
* 1. use属性表示模块使用什么loader
* 2. 模块可以使用多个loader,处理顺序为use属性的数组的第一个到最后一个
*/
rules: [
// 图片文件小于8192byte时,转换为base64字符串
{
test: /\.(gif|png|jpg|jpeg|woff|woff2|eot|ttf|svg)(\?t=\d+)?$/,
exclude: /node_modules/,
use: ["url-loader?limit=8192"]
},
/**
* 将js和jsx模块的源代码编译成浏览器能正常执行的代码
* 特别说明:
* 1. eslint是一个代码检查工具,中文官网:https://cn.eslint.org/
* 一般我们会在项目根目录下为eslint创建一个配置文件 .eslintrc.json ,关于eslint * 的配置,祥见:附录/eslint-loader配置文件
* 2. babel是一个JavaScript编译器,它能够将浏览器尚未实现的新一代的ES语法转换成浏览器 * 已实现的语法,比如我们现在广泛使用的es6和部分es7语法和新的内置对象,其实浏览器并没 * 有完全实现,但是有了babel,我们完全可以放心使用它们。
* 3. 一般我们会在项目根目录下为babel创建一个配置文件 .babelrc ,关于babel的配置,详 * 见:附录/babel-loader配置文件
*/
{
enforce: "pre",
test: /\.(js|jsx)?$/,
exclude: /node_modules/,
use: [{
loader: 'eslint-loader',
options: {
emitError: true,
emitWarning: true,
failOnError: true
}
}]
},
{
test: /\.(js|jsx)?$/,
exclude: /node_modules/,
use: ["babel-loader"]
},
/**
* 处理css模块
* loader说明:
* 1. style-loader 将css文件以
* <link rel="stylesheet" href="path/to/file.css">
* 的形式插入到html文件
* 2. css-loader 处理css的 @import语句 与 url() ,同时压缩代码
* 3. postcss-loader 对css做一些加工处理,具体的配置放在postcss.config.js,比如给 * css自动添加浏览器厂商前缀。如果不知道css浏览器厂商前缀的,请自行百度。
*/
{
test: /\.(css)?$/,
use: [
"style-loader/url",
{
loader: "css-loader",
options: {
minimize: {
safe: true,
discardComments: {
removeAll: true
}
}
}
},
"postcss-loader"
]
},
/**
* 处理less模块
* 特别说明:
* 1. Less 是一门 CSS 预处理语言,它扩展了 CSS 语言,增加了变量、Mixin、函数等特性, * 使 CSS 更易维护和扩展。
* 2. Less中文网:http://lesscss.cn/
*/
{
test: /\.less$/,
use: ["style-loader", "css-loader", "less-loader"]
},
/**
* 处理scss模块
* 特别说明:
* 1. sass与less类似,也是一门css预处理语言。
*/
{
test: /\.scss$/,
exclude: /node_modules/,
use: [
'style-loader',
'css-loader',
'postcss-loader',
'sass-loader'
]
}
]
}
//...
}
externals
module.exports = {
//...
/**
* 外部扩展
* 有时候你可能不想把某个第三方 library 打包进你的 package 里,而是希望 library 做为外部依赖; * 比如通过 script 标签来加载此 library , externals 这个选项可以帮到你。
*/
externals: {
"react": {
commonjs: 'React',
commonjs2: 'React',
amd: 'React',
root: 'React'
},
"react-dom": {
commonjs: 'ReactDOM',
commonjs2: 'ReactDOM',
amd: 'ReactDOM',
root: 'ReactDOM'
}
}
//...
}
optimization
module.exports = {
//...
/**
* 优化
*/
optimization: {
/**
* 代码拆分
* 从入口文件开始,webpack 递归地构建了整个应用的模块依赖图表(dependency graph),然后通 * 常会将所有的模块打包成一个 bundle。但是有两种情况需要把一些模块拆分成单独的 bundle:
* 1. 通过 import() 函数导入的模块,这些模块不会被打包进主 bundle 里,而是拆分为单独的 * bundle,等待 import() 函数执行,再去异步加载。
* import() 函数介绍:https://juejin.im/entry/58ba3308a22b9d005ede7565
* 2. 有的模块由于被多个不同的 bundle 依赖,所以这几个 bundle 里都会有该模块的代码;这时就 * 需要将这种模块也单独拆分出来,避免重复加载相同的模块。
*/
splitChunks: {
chunks: "all",
minSize: 30000,
minChunks: 2,
maxAsyncRequests: 5,
maxInitialRequests: 3,
automaticNameDelimiter: "~",
name: true,
cacheGroups: {
default: false,
vendor: {
name: "vendor",
priority: 99
}
}
}
}
}
以上就是webpack
的基础配置了。我们还需要把配置中用到的loader
及相关的模块下载到本地。
其中,由于:
babel-loader
依赖以下列出的package
:
- babel-core
- babel-runtime
- babel-plugin-transform-runtime
- babel-plugin-external-helpers
- babel-preset-env
- babel-preset-react
- babel-plugin-import
- babel-plugin-syntax-dynamic-import
- babel-plugin-transform-class-properties
- babel-plugin-transform-decorators-legacy
eslint-loader
依赖以下列出的package
:
less-loader
依赖 less
postcss-loader
依赖 postcss
把上面列出的package
写入package.json
的dependencies
和devDependencies
{
"dependencies": {
"babel-runtime": "^6.26.0"
},
"devDependencies": {
"autoprefixer": "^9.1.5",
"babel-core": "^6.26.3",
"babel-eslint": "^9.0.0",
"babel-loader": "^7.1.5",
"babel-plugin-external-helpers": "^6.22.0",
"babel-plugin-import": "^1.9.1",
"babel-plugin-syntax-dynamic-import": "^6.18.0",
"babel-plugin-transform-class-properties": "^6.24.1",
"babel-plugin-transform-decorators-legacy": "^1.3.5",
"babel-plugin-transform-runtime": "^6.23.0",
"babel-preset-env": "^1.7.0",
"babel-preset-react": "^6.24.1",
"css-loader": "^1.0.0",
"eslint": "^5.6.0",
"eslint-loader": "^2.1.1",
"eslint-plugin-react": "^7.11.1",
"file-loader": "^2.0.0",
"less": "^3.8.1",
"less-loader": "^4.1.0",
"node-sass": "^4.9.0",
"path": "^0.12.7",
"postcss": "^6.0.22",
"postcss-loader": "^3.0.0",
"react-hot-loader": "^4.3.8",
"sass-loader": "^7.0.3",
"style-loader": "^0.23.0",
"url-loader": "^1.1.1",
"webpack": "^4.12.0",
"webpack-cli": "^3.1.0",
"webpack-merge": "^4.1.4"
}
}
接着
$ npm install
webpack自动化开发环境配置
上一步的基础配置都完成之后,实际上webpack
已经可以正常工作了,你可以写一些测试模块,然后在src/index.js
引入,用命令行运行webpack
$ webpack --config ./build/webpack.base.js --mode=development
但是这个过程是纯手动的,我们可以使用一些webpack plugin
来让某些动作自动化,以此来提高工作效率。
下面是webpack
开发模式的配置文件:
var base = require("./webpack.base.js"),
// merge() 合并配置选项
merge = require('webpack-merge'),
HtmlWebpackPlugin = require("html-webpack-plugin"),
copyWebpackPlugin = require("copy-webpack-plugin");
module.exports = merge(base, {
// 开发模式
mode: "development",
devtool: "#cheap-module-eval-source-map",
// webpack plugin -> https://webpack.docschina.org/plugins/
plugins: [
// 复制无需参与构建的文件到输出位置
new copyWebpackPlugin([
{
from: "src/js_modules/react/dev/react.js",
to: "js/"
},
{
from: "src/js_modules/react-dom/dev/react-dom.js",
to: "js/"
},
{
from: "img/**/*.*",
to: ""
}
]),
// 自动在输出位置创建html文件,并在html文件自动注入加载bundle的script标签或link标签
new HtmlWebpackPlugin({
filename: "index.html",
template: "index.html",
chunks: ["main", "vendor"],
inject: true,
chunksSortMode: "auto"
})
]
});
光是能复制或自动创建文件还不够,我们希望在开发过程中,当我们修改代码之后,webpack能够监听变更的文件自动增量编译,也希望浏览器能实时响应我们的代码(文件)变更,并自动变化或重载。要实现这个需求,我们需要使用express
,并结合webpack-dev-middleware
和webpack-hot-middleware
来搭建一个开发服务器。顺便提一句我个人比较推荐使用gulp来作为项目工程化的流程管理工具,所以启动开发服务器我是作为一个 gulp任务 来编写的,首先在根目录创建一个gulpfile.js
,写入下面的代码:
var gulp = require("gulp"),
gutil = require("gulp-util"),
express = require("express"),
webpack = require("webpack"),
webpackDevMiddleware = require("webpack-dev-middleware"),
webpackHotMiddleware = require("webpack-hot-middleware"),
history = require("connect-history-api-fallback"),
opn = require("opn");
// 开发服务器
gulp.task("dev", function() {
var webpackDevConfig = require("./build/webpack.dev.js");
webpackDevConfig.entry = [
"webpack-hot-middleware/client?noInfo=true"
].concat([webpackDevConfig.entry]);
webpackDevConfig.plugins = webpackDevConfig.plugins.concat([
new webpack.HotModuleReplacementPlugin()
]);
var devCompiler = webpack(webpackDevConfig);
var devMiddleware = webpackDevMiddleware(devCompiler, {
publicPath: webpackDevConfig.output.publicPath,
stats: {
chunks: false,
colors: true,
timings: true,
source: true,
cachedAssets: false
},
watchOptions: {
ignored: /node_modules/,
aggregateTimeout: 300,
poll: true
}
});
var hotMiddleware = webpackHotMiddleware(devCompiler, {
log: false
});
var server = express();
server.use(history());
server.use(devMiddleware);
server.use(hotMiddleware);
server.listen(3008, function(err) {
if (err) throw new gutil.PluginError("webpack-dev-server", err);
opn("http://localhost:3008")
});
});
把以上相关的package
写入package.json
并npm install
{
"dependencies": {
"babel-runtime": "^6.26.0",
"react": "^16.4.1"
},
"devDependencies": {
"autoprefixer": "^9.1.5",
"babel-core": "^6.26.3",
"babel-eslint": "^9.0.0",
"babel-loader": "^7.1.5",
"babel-plugin-external-helpers": "^6.22.0",
"babel-plugin-import": "^1.9.1",
"babel-plugin-syntax-dynamic-import": "^6.18.0",
"babel-plugin-transform-class-properties": "^6.24.1",
"babel-plugin-transform-decorators-legacy": "^1.3.5",
"babel-plugin-transform-runtime": "^6.23.0",
"babel-preset-env": "^1.7.0",
"babel-preset-react": "^6.24.1",
"connect-history-api-fallback": "^1.5.0",
"copy-webpack-plugin": "^4.5.2",
"css-loader": "^1.0.0",
"eslint": "^5.6.0",
"eslint-loader": "^2.1.1",
"eslint-plugin-react": "^7.11.1",
"express": "^4.16.3",
"file-loader": "^2.0.0",
"gulp": "^3.9.1",
"gulp-sequence": "^1.0.0",
"gulp-util": "^3.0.8",
"html-webpack-plugin": "^3.2.0",
"http-proxy-middleware": "^0.18.0",
"less": "^3.8.1",
"less-loader": "^4.1.0",
"node-sass": "^4.9.0",
"opn": "^5.3.0",
"path": "^0.12.7",
"postcss": "^6.0.22",
"postcss-loader": "^3.0.0",
"react-hot-loader": "^4.3.4",
"sass-loader": "^7.0.3",
"style-loader": "^0.23.0",
"url-loader": "^1.1.1",
"webpack": "^4.12.0",
"webpack-cli": "^3.1.0",
"webpack-dev-middleware": "^3.1.3",
"webpack-hot-middleware": "^2.22.3",
"webpack-merge": "^4.1.4"
}
}
然后在根目录创建index.html
,内容如下:
<!doctype html>
<html>
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1, maximum-scale=1, minimum-scale=1, user-scalable=no" />
</head>
<body>
<div id="app"></div>
<script src="./js/react.js"></script>
<script src="./js/react-dom.js"></script>
</body>
</html>
接着,编写一个react
组件
// 文件路径:react-template/src/components/myFirstComponent/myFirstComponent.jsx
import { hot } from "react-hot-loader";
// @hot 可以是react组件热重载
@hot(module)
class MyFirstComponent extends React.Component {
state = {
text: "Hello React"
};
/** 组件生命周期钩子函数:在组件挂载完成后立即被调用 */
componentDidMount() {
console.log("组件挂载完成!");
}
render() {
return (
<div>{this.state.text}, I am {this.props.author}!</div>
)
}
}
export default MyFirstComponent;
// 文件路径:react-template/src/index.js
import MyFirstComponent from "./components/myFirstComponent/myFirstComponent"
ReactDOM.render(<MyFirstComponent author="Shaye"></MyFirstComponent>, document.getElementById("app"));
最后,打开CMD
:
$ gulp dev
废话少说,直接上图:
浏览器会自动打开:
你还可以试着修改组件的内容,你会发现每当你按下保存键,浏览器会跟着实时变化
好了,前面折腾了这么久,现在你可以去开发你的react应用了。只不过嘛,现在你能自由地开发调试了,但是还不能构建产品包,所以接下来我们还需要再配置一下 如何构建生产环境的代码。
webpack构建生产环境代码配置
webpack.pro.js
配置文件
var base = require('./webpack.base.js'),
merge = require('webpack-merge'),
HtmlWebpackPlugin = require('html-webpack-plugin'),
BundleAnalyzerPlugin = require('webpack-bundle-analyzer').BundleAnalyzerPlugin,
WebpackMd5Hash = require('webpack-md5-hash');
module.exports = merge(base, {
mode: 'production',
plugins: [
new WebpackMd5Hash(),
new BundleAnalyzerPlugin(),
new HtmlWebpackPlugin({
filename: 'index.html',
template: 'index.html',
chunks: ['main', 'vendor'],
inject: true,
chunksSortMode: 'auto',
minify: {
removeComments: true,
collapseWhitespace: true,
removeAttributeQuotes: true
}
})
]
});
编写gulp
构建生产环境代码任务:
var gulp = require("gulp"),
gulpSequence = require("gulp-sequence"),
gutil = require("gulp-util"),
del = require("del"),
uglify = require("gulp-uglify"),
imagemin = require("gulp-imagemin"),
express = require("express"),
webpack = require("webpack"),
webpackDevMiddleware = require("webpack-dev-middleware"),
webpackHotMiddleware = require("webpack-hot-middleware"),
history = require("connect-history-api-fallback"),
opn = require("opn");
//...省略其他任务
//清除
gulp.task("clean", function(cb) {
del.sync("dist");
cb();
});
//图片压缩
gulp.task("copyImg", function() {
return gulp
.src("img/**/*.*")
.pipe(imagemin())
.pipe(gulp.dest("dist/img/"));
});
//复制无需编译的js文件
gulp.task("copyJs", function() {
return gulp
.src([
"src/js_modules/react/pro/react.js",
"src/js_modules/react-dom/pro/react-dom.js"
])
.pipe(uglify())
.pipe(gulp.dest("dist/js/"));
});
//webpack production
gulp.task("webpackPro", function(cb) {
var webpackProConfig = require("./build/webpack.pro.js");
webpack(webpackProConfig, function(err, stats) {
if (err) throw new gutil.PluginError("webpack:production", err);
gutil.log(
"[webpack:production]",
stats.toString({
chunks: false,
colors: true,
timings: true,
source: true,
cachedAssets: false
})
);
cb();
});
});
gulp.task("buildSuccess", function(cb) {
gutil.log("[webpack:production]", "build success!");
cb();
});
gulp.task(
"build",
gulpSequence("clean", "copyImg", "copyJs", "webpackPro", "buildSuccess")
);
最后,老规矩把相关的package
写入package.json
并npm install
"dependencies": {
"babel-runtime": "^6.26.0",
"react": "^16.4.1"
},
"devDependencies": {
"autoprefixer": "^9.1.5",
"babel-core": "^6.26.3",
"babel-eslint": "^9.0.0",
"babel-loader": "^7.1.5",
"babel-plugin-external-helpers": "^6.22.0",
"babel-plugin-import": "^1.9.1",
"babel-plugin-syntax-dynamic-import": "^6.18.0",
"babel-plugin-transform-class-properties": "^6.24.1",
"babel-plugin-transform-decorators-legacy": "^1.3.5",
"babel-plugin-transform-runtime": "^6.23.0",
"babel-preset-env": "^1.7.0",
"babel-preset-react": "^6.24.1",
"connect-history-api-fallback": "^1.5.0",
"copy-webpack-plugin": "^4.5.2",
"css-loader": "^1.0.0",
"eslint": "^5.6.0",
"eslint-loader": "^2.1.1",
"eslint-plugin-react": "^7.11.1",
"express": "^4.16.3",
"file-loader": "^2.0.0",
"gulp": "^3.9.1",
"gulp-sequence": "^1.0.0",
"gulp-util": "^3.0.8",
"html-webpack-plugin": "^3.2.0",
"http-proxy-middleware": "^0.18.0",
"less": "^3.8.1",
"less-loader": "^4.1.0",
"node-sass": "^4.9.0",
"opn": "^5.3.0",
"path": "^0.12.7",
"postcss": "^6.0.22",
"postcss-loader": "^3.0.0",
"react-hot-loader": "^4.3.4",
"sass-loader": "^7.0.3",
"style-loader": "^0.23.0",
"url-loader": "^1.1.1",
"webpack": "^4.12.0",
"webpack-cli": "^3.1.0",
"webpack-dev-middleware": "^3.1.3",
"webpack-hot-middleware": "^2.22.3",
"webpack-merge": "^4.1.4"
}
最后的最后,命令行输入gulp build
试试效果吧!
附录
babel-loader配置文件
{
"presets": [
[
"env",
{
"modules": false,
"targets": {
"browsers": ["last 5 versions", "IE 9"]
}
}
],
"react"
],
"plugins": [
[
"transform-runtime",
{
"polyfill": false,
"regenerator": true
}
],
"external-helpers",
"syntax-dynamic-import",
"transform-class-properties",
"transform-decorators-legacy",
[
"import",
{
"libraryName": "antd",
"libraryDirectory": "es",
"style": "css"
}
],
"react-hot-loader/babel"
],
"env": {
"test": {
"presets": [
[
"env",
{
"modules": false,
"targets": {
"browsers": [
"last 5 versions",
"IE 9"
]
}
}
],
"react"
],
"plugins": [
[
"transform-runtime",
{
"polyfill": false,
"regenerator": true
}
],
"external-helpers",
"syntax-dynamic-import",
"transform-es2015-modules-commonjs",
"transform-class-properties",
"transform-decorators-legacy",
[
"import",
{
"libraryName": "antd",
"libraryDirectory": "es",
"style": "css"
}
]
]
}
}
}
eslint-loader配置文件
{
"root": true,
"env": {
"es6": true,
"browser": true,
"node": true
},
"parser": "babel-eslint",
"parserOptions": {
"sourceType": "module",
"ecmaFeatures": {
"jsx": true,
"experimentalObjectRestSpread": true
}
},
"globals": {
"ReactDOM": false,
"React": false,
"jest": false,
"test": false,
"expect": false,
"describe": false,
"it": false
},
"plugins": ["react"],
"extends": ["eslint:recommended", "plugin:react/recommended"],
"settings": {
"react": {
"version": "16.4.1"
}
},
"rules": {
"no-extra-semi": 0,
"no-console": 0,
"react/prop-types": 0,
"no-extra-boolean-cast": 0,
"no-else-return": [1, { "allowElseIf": false }],
"no-loop-func": 1,
"arrow-spacing": 1,
"eqeqeq": 2,
"no-restricted-properties": [
2,
{
"object": "disallowedObjectName",
"property": "disallowedPropertyName"
},
{
"object": "disallowedObjectName",
"property": "anotherDisallowedPropertyName",
"message": "Please use allowedObjectName.allowedPropertyName."
}
],
"no-return-assign": [2, "always"],
"no-sequences": 2,
"no-throw-literal": 2,
"no-unmodified-loop-condition": 2,
"no-useless-return": 2,
"prefer-promise-reject-errors": [2, {"allowEmptyReject": true}],
"require-await": 2,
"jsx-quotes": [2, "prefer-double"],
"prefer-const": 2
}
}
postcss-loader配置文件
module.exports = {
plugins:[
require('autoprefixer')({
browsers:[
"last 3 versions","iOS 7","not ie <= 9",
"Android >= 4.0",
"last 3 and_chr versions",
"last 3 and_ff versions",
"last 3 op_mob versions",
"last 3 op_mob versions",
"last 3 op_mini versions"
],
//是否美化属性值
cascade:true,
//是否去掉不必要的前缀
remove:true
})
]
};
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