Parse JSON string in JavaScript

let jsonStr = '{"id":1, "username":"john", "creationDate":"2020-11-24"}';
let user = JSON.parse(jsonStr);

Nowadays, JSON is one of the most widely used file format because - despite its name - it is language-independent and can be read by both humans and machines. In JavaScript the JSON object contains methods for parsing JSON strings and converting values to JSON format.

The JSON.parse() method parses a JSON string, constructing the JavaScript value or object described by the string.