So you are creating an additional functionality before your main application, to handle some operations based on incoming data. This is called a facade pattern with simple NodeJS rest API. There is nothing easiest than building the simple REST API in NodeJS + ExpressJS, take data from data base, convert and map it there in NodeJS API, and then return to you front-end application.

But in real world, you will need to make it working just by yourself. Of course, in ideal world, there would be a back-end developer who can deal with that problem. You need to take only a data from a few columns, do mapping function, aggregate the data and display to user the final results. But in there response there is 100 000 rows, each with 30 columns. Let’s say that you are the front-end developer and you need to do some mapping functionality before displaying data received from data base. What can be the purpose of building simple REST API with NodeJS? It’s very simple, just check example below: NodeJS simple REST API – the purpose explanation NodeJS simple REST API – the purpose explanation.

Restful api nodejs