reactjs学习一（环境搭配react+es6+webpack热部署）

本文的源码在这里下载 https://github.com/tianxiangbing/webpack-study   或者使用这个种子项目 https://github.com/tianxiangbing/react-seed

reactjs今年在前端圈里很火，用了三四个月，感觉确实很适合前端开发人员使用，值得深入一下，所以这里记录一下我简单的学习过程，首先是react的环境，由于现在react的新版本已经很稳定了，所以推荐使用es6+webpack来搭建开发环境。

首先，安装nodejs，略过，安装gitbrach，略过，直接搜索到相对应软件的官网，下载最新正式版本的软件，然后就下一步下一步完成安装就可以了，很简单的过程，但是不容忽略，如有问题，可以问我。

然后就是安装webpack和一些依赖组件，便于打包，比如，在你的项目文件夹里执行

npm init

然后就是一直回车，新建一个 package.json 的文件，然后添加如下的代码进去：

  "devDependencies": {
    "babel-core": "^6.7.7",
    "babel-loader": "^6.2.4",
    "babel-preset-es2015": "^6.6.0",
    "babel-preset-react": "^6.5.0",
    "component-ajax": "forbeslindesay/ajax",
    "css-loader": "^0.23.1",
    "extract-text-webpack-plugin": "^1.0.1",
    "file-loader": "^0.8.5",
    "html-loader": "^0.4.3",
    "html-webpack-plugin": "^2.16.1",
    "moment": "^2.13.0",
    "node-sass": "^3.5.3",
    "react": "^15.0.1",
    "react-cookie": "^0.4.6",
    "react-dom": "^15.0.1",
    "react-helmet": "^3.1.0",
    "react-router": "^2.4.0",
    "sass-loader": "^3.2.0",
    "style-loader": "^0.13.1",
    "url-loader": "^0.5.7",
    "webpack": "^1.13.0",
    "webpack-dev-server": "^1.14.1"
  }

有些不是必须的，但建议都加上，以防后面还是会用到，再执行 npm install  安装这些依赖到本地，控制台测试下webpack是否安装成功：

webpack -v

如果报错了，可以尝试把webpack安装成全局的

npm install -g webpack

接下来，就是新建一个  webpack.config.js  的配置文件了，然后粘贴如下的代码进去.

var path = require("path");
var webpack = require('webpack');
var ExtractTextPlugin = require("extract-text-webpack-plugin");
console.log("+++++++++++" + process.env.NODE_ENV + "***********")
var TEST = process.env.NODE_ENV == "test" || process.env.NODE_ENV == "dev";
console.log(TEST)
var filename = TEST ? "[name]" : "[chunkhash:8].[name]";
console.log(filename)
var extractCSS = new ExtractTextPlugin('' + filename + '.css');
//var ignoreFiles = new webpack.IgnorePlugin(new RegExp("^(jquery|react|react-dom)$"));

//动态创建html
var HtmlWebpackPlugin = require('html-webpack-plugin');
var htmlPlugin = new HtmlWebpackPlugin({
    title: "签到",
    filename: '../index.html',
    template: "template.html"
});
var modulesDirectories = ["web_modules", "node_modules", "bower_components", "app/devconfig", "app/cyconfig"];
if (process.env.NODE_ENV == "test") {
    modulesDirectories = ["web_modules", "node_modules", "bower_components", "app/config", "app/cyconfig"];
}
var config = {
    entry: {
        app: ["./app/app.jsx"],
        vendor: ["react", "react-dom", 'whatwg-fetch', 'react-router']
    },
    output: {
        path: path.resolve(__dirname, "caiyun/build"),
        //publicPath: "/data/assets/build/",
        publicPath: "",
        filename: filename + ".js"
    },
    resolve: {
        modulesDirectories: modulesDirectories,
        extensions: ['', '.js', '.jsx', 'css']
    },
    module: {
        loaders: [{
            jsx: /\.(js|jsx)$/,
            exclude: /(node_modules|bower_components)/,
            loader: 'babel',
            query: {
                presets: ['es2015', 'react']
            }
        }, {
            test: /\.(eot|woff|ttf|svg)/,
            loader: 'file-loader?name=[name].[ext]'
        }, {
            test: /\.scss$/,
            exclude: /(node_modules|bower_components)/,
            loader: extractCSS.extract('style-loader', 'css?!sass?includePaths[]=' + path.resolve(__dirname, 'app/scss'))
        }, {
            test: /\.css$/,
            loader: extractCSS.extract('style-loader', 'css?includePaths[]=' + path.resolve(__dirname, 'app/scss'))
        }, {
            test: /\.html$/,
            loader: "html-loader"
        }, {
            test: /\.png$/,
            loader: "file-loader?name=[hash:8].[name].[ext]"
        }]
    },
    plugins: [
        new webpack.DefinePlugin({
            "process.env": {
                NODE_ENV: JSON.stringify("production")
            }
        }),
        extractCSS,
        //ignoreFiles
        new webpack.optimize.CommonsChunkPlugin("vendor", "base.js"), htmlPlugin
    ]
};
if (process.env.NODE_ENV == "test" || process.env.NODE_ENV == "dev") {
    config.devtool = "source-map";
    config.output.publicPath = "/";
}
if (process.env.NODE_ENV == "production") {
    config.resolve.modulesDirectories = ["web_modules", "node_modules", "bower_components", "app/devconfig", "app/msconfig"];
    config.output.path = path.resolve(__dirname, "masheng/build")
}
console.log(config)
module.exports = config

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