using fs module in typescript and export a class
<p>In my Angular2 application, I'm trying to import fs and use it in my class then export it so that I could import in my app.component.ts</p>

<pre><code>// foo.ts
import * as fs from "fs"
export class Foo {
  foo1() {
    fs.readFile('file.txt', (err, data) =&gt; {
      if (err) throw err
      return data
    })
  }
}

// app.component.ts
import { Foo } from './foo.ts'
.....
export class AppComponent {
  foo: Foo;
  constructor() {
    this.foo = new Foo();
  }
}
</code></pre>

<p>but my npm just told me that <code>404 GET /fs</code>
I think I have successfully import <code>fs</code>, but I can't use <code>Foo.foo1()</code>
Does any one know that?</p>

<p>I tried to add <code>/// &lt;reference path='../node/node.d.ts' /&gt;</code> and it still can not work</p>

<p>node: v.4.3.0</p>