---
layout: api
version: 4x
title: Express 4.x - API リファレンス
description: Access the API reference for Express.js 4.x, detailing all modules, methods, and properties for building web applications with this version.
menu: api
redirect_from: "  "
---

<div id="api-doc" markdown="1">

  <h1>4.x API</h1>

{% capture node-version %}

Express 4.0 requires Node.js 0.10 or higher.

{% endcapture %}

{% include admonitions/note.html content=node-version %}

<a id='express' class='h2'></a>
{% include api/en/4x/express.md %} <a id='app' class='h2'></a>
{% include api/en/4x/app.md %} <a id='req' class='h2'></a>
{% include api/en/4x/req.md %} <a id='res' class='h2'></a>
{% include api/en/4x/res.md %} <a id='router' class='h2'></a>
{% include api/en/4x/router.md %}

</div>
