In this article I explain how to very easily create an API using Express. I also provide you with code snippets and real world examples. How to Build a simple REST API with Express.js
In simple terms a REST Api is an API on a backend which you make a call to from the frontend/client side, telling it what you want and it returns your data.
A very simple example is as follows: Let’s say you have a database with a bunch of product data in. You want a list of products that is cheaper than $200. You make a call to the API from the frontend. The API queries the database and returns a list of products cheaper than $200. Very simple right! You can create very complex APIs, but most of the time you’ll only need a very simple one. It’s most commonly used to query and return data from a database.
Just to summarize, the steps are:
Just quickly before we start. What is Express.js?
Express is a backend web framework for Node.js which you can use to easily make an API
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REST (Representational State Transfer) is web standards based architecture and uses HTTP Protocol. A REST Server simply provides access to resources and REST client accesses and modifies the resources using HTTP protocol. REST uses various representations to represent a resource like text, JSON, and XML but JSON is the most popular one. In this post, you'll see How to Develop RESTful API using NodeJS and ExpressJS
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