react-hot-loader的用法是什么

npm install --save-dev react-hot-loader

npm install --save-dev webpack-dev-server

var webpack = require('webpack'); var WebpackDevServer = require('webpack-dev-server'); var config = require('./webpack.config'); new WebpackDevServer(webpack(config), { publicPath: config.output.publicPath, hot: true, historyApiFallback: true }).listen(3000, 'localhost', function (err, result) { if (err) { return console.log(err); } console.log('Listening at http://localhost:3000/') }); 配置 webpack.config.js 然后在 webpack 的配置文件里添加 react-hot-loader。 打开 webpack.config.js var webpack = require('webpack'); module.exports = { // 修改 entry entry: [ // 写在入口文件之前 "webpack-dev-server/client?http://0.0.0.0:3000", "webpack/hot/only-dev-server", // 这里是你的入口文件 "./src/app.js", ], output: { path: __dirname, filename: "build/js/bundle.js", publicPath: "/build" }, module: { loaders: [ { test: /\.jsx?$/, exclude: /node_modules/, // 在这里添加 react-hot，注意这里使用的是loaders，所以不能用 query，应该把presets参数写在 babel 的后面 loaders: ['react-hot', 'babel?presets[]=react,presets[]=es2015'] } ] }, // 添加插件 plugins: [ new webpack.HotModuleReplacementPlugin() ]

webpack --display-error-details --progress --colors --watch