webpack-dev-server不是内部命令，通过scripts配置后可以为什么？

Question

webpack-dev-server不是内部命令,然后配置package.json的scipt后npm run server就可以启动服务器这是为什么？scripts "scripts": {    "test": "echo \"Error: no test specified\" && exit 1",     **"server":"webpack-dev-server"**   },下面是我package.json的配置{  "name": "demo",  "version": "1.0.0",  "description": "",  "main": "index.js",  "scripts": {    "test": "echo \"Error: no test specified\" && exit 1",    "server":"webpack-dev-server"  },  "keywords": [],  "author": "",  "license": "ISC",  "devDependencies": {    "babel-loader": "^6.4.1",    "css-loader": "^0.28.0",    "style-loader": "^0.16.1",    "url-loader": "^0.5.8",    "webpack": "^2.3.3",    "webpack-dev-server": "^2.4.2"  }}

Answer 1

可以这么理解，npm run命令会开启一个新的shell,默认把node_modules/.bin添加到环境变量$PATH
所以你npm run运行的webpack-dev-server来自当前项目的node_modules/.bin目录下