1.命令行：cnpm install webpack-dev-server --save-dev 安装服务
2.在package.json中修改命令
{
"name":"webpacktest",
"version":"1.0.0",
"description":"webpack test",
"main":"index.js",
"scripts": {
"server":"webpack-dev-server"
},
"author":"momo",
"license":"ISC",
"devDependencies": {
"webpack":"^3.8.0",
"webpack-dev-server":"^2.9.2"
}
}
3.启动服务 npm run server 效果和live-server一样，并且支持热更新，前提是webpack在3.5以上
