把你的package.json里面的 script粘出來看看呀~應(yīng)該是那里的問題

//package.json文件
{
 "name": "modern-javascript-example",
 "version": "1.0.0",
 "description": "",
 "main": "index.js",
 "scripts": { 
   "test": "echo \"Error: no test specified\" && exit 1",
   "build": "webpack --progress -p",//看看這一行
   "watch": "webpack --progress --watch"
 }
}