title: WebStorm: Module is not listed in package.json dependencies
body: <p>I have tried importing the NPM package Express into WebStorm to use it using the following method: <a href="https://www.jetbrains.com/webstorm/help/installing-and-removing-external-software-using-node-package-manager.html#d89772e236" rel="noreferrer">https://www.jetbrains.com/webstorm/help/installing-and-removing-external-software-using-node-package-manager.html#d89772e236</a></p>
  
  <p>Although I have followed the steps, when I use my code: </p>
  
  <pre><code>var express = require("express");
  var url = require("url");
  var http = require("http");
  var app;...
  </code></pre>
  
  <p>It underlines express, with the following message:
  Module is not listed in package.json dependencies.</p>
  
  <p>I do not have that much experience with WebStorm, so I do not know how to fix this. Would anyone care to explain?</p>