What are express.json() and express.urlencoded()?

Question

I cannot find any documentation on express.json() and express.urlencoded(). What do each of them do exactly?

Answer 1

The json and urlencoded middleware are both part of bodyParser. This is what the README says:

bodyParser([options])

Returns middleware that parses both json and urlencoded. The options are passed to both middleware.

bodyParser.json([options])

Returns middleware that only parses json. The options are:

• strict - only parse objects and arrays
• limit <1mb> - maximum request body size
• reviver - passed to JSON.parse()

bodyParser.urlencoded([options])

Returns middleware that only parses urlencoded with the qs module. The options are:

• limit <1mb> - maximum request body size