### 执行顺序 ####　& , 并行执行，同时 ``` "dev":"node test.js & webpack" ``` #### && ，顺序执行， 前面执行完成才执行后面 ``` "dev":"node test.js && webpack" ``` #### 顺序钩子 ``` "predev":"node test_one.js", "dev":"node test_two.js", "postdev":"node test_three.js" ``` 当执行 npm run dev 的时候默认就会执行 npm run predev && npm run dev && npm run postdev #### 简写 ``` npm start === npm run start npm stop === npm run stop npm test === npm run test npm restart === npm run stop && npm run restart && npm run start ```