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JavaScript Build a REST API With Express Building API Routes in Express Accepting Data

Why do we tag ".json" to the end when we require body-parser?

const jsonParser = require('body-parser').json

What does the .json do? Usually I just require modules without adding anything after the parentheses.

1 Answer

Othneil Drew
Othneil Drew
22,421 Points

The body-parser middleware package has different parsing options for handling and transforming data. These include JSON, text, url-encoded form data, and raw data. Requiring the package as require('body-parser).json; simply provides a shorter way for calling it later for use instead of using it like this -> bodyParser.json() you can use it like so -> jsonParser();


// requiring the package
const bodyParser = require('body-parser');
const jsonParser = require('body-parser').json;

// using it for json (these do the same exact thing)

It's more of a styling preference than anything. Hope this helps. -- Drew