javascript - Difference between pm.response.json() and JSON.parse(responseBody)

Question

What is the fundamental difference between

const json_response = pm.response.json()

and

json_response = JSON.parse(responseBody)

question from:https://stackoverflow.com/questions/65901110/difference-between-pm-response-json-and-json-parseresponsebody

Answer 1

As Danny Dainton has already pointed out, JSON.parse(responseBody) and pm.response.json() do the same thing - they both return the response body of your API request as a string in JSON format.

Concerning the missing const declaration in the second statement. - If you put the two statements in the same file, then clearly you are correct to leave out the const declaration in the second statement.
(Otherwise there will be a syntax error: Identifier 'json_response' has already been declared.)

But since the two statements do the same thing, it makes no sense to have them both in the same script. And if they are not in the same script, a declaration is necessary in the second statement as well as in the first.