# Keywords

## client

requests services and information from the server. Typically, a client is a computer application, such as a web browser.

## dependencies

Other code libraries that your project relies on.   These are usually listed in your project's `package.json` file.

## endpoint

The part of the URL which comes after `/`. For example: `/chocolate` is the "chocolate" endpoint.

## `fs`

A core Node.js module for interacting with the file system on your computer. 

## `GET`

An HTTP method for fetching data. Read more [here](http://www.w3schools.com/tags/ref_httpmethods.asp)

## handler function

A function that receives requests and tells the server how to respond to them.

## JSON

A format for storing and transporting data. Read more [here](http://www.w3schools.com/js/js_json.asp).

## method

Method is another name for a function

## middleware

Functions in Express that run before the final request handler. A nice article explains in more depth [here](https://www.safaribooksonline.com/blog/2014/03/10/express-js-middleware-demystified).

## module

a bit of reusable code, written by you or someone else, that can be imported into a Node.js project using [require](#require)

## npm

npm is a "package manager" for Node.js, meaning it allows you to easily install external modules (or chunks of code) published by others and use them in your project.

## `package.json`

The file used to store information about a Node.js project, such as its name and its dependencies. 

## `POST`

An HTTP method for sending data. Read more [here](http://www.w3schools.com/tags/ref_httpmethods.asp).

## port

a number that serves as an endpoint, determining where you can access your web application.

## repository

A place that code lives.  You often hear people talk about Git/Github repositories.

## request

the message sent via HTTP from the client to the server, asking for information

## `require`

`require` is used in Node.js to import functionality from another file or an external module

## response

the data sent back to the client from the server after an HTTP request is made.

## route / routing

The definition of application endpoints and how they respond to client requests.

## server

A software application which handles HTTP requests sent by the client, like web browsers, and returns web pages and information in response

## static assets

Files such as HTML, CSS and JavaScript documents or images that you want to appear in the browser.