我可以运行以下命令来启动我的应用程序.

node app

但是,当我运行以下命令时,我收到以下错误：

npm start

Windows Script Host
Object expected

Line 2

800A138F

Microsoft JScript runtime error

App.js：

var port = 5000;
var express = require('express');

的package.json：

{
  "name": "2","version": "1.0.0","description": "","main": "app.js","scripts": {
    "start": "app.js"
  },"author": "","license": "ISC","dependencies": {
    "express": "^4.13.3"
  }
}

我当然运行这个命令：

npm install express --save

好像NPM找不到快递包？为什么不？