What json stringify does?

JSON.stringify() is a JavaScript method that converts JavaScript objects, arrays, and values into JSON-formatted strings. This is essential for sending data to web servers, storing data in local storage, or transmitting data between different parts of an application. The method accepts three parameters: the value to convert, an optional replacer function or array to filter properties, and an optional space parameter for formatting. For example, JSON.stringify({name: "John"}) returns '{"name":"John"}'. The method automatically handles nested objects and arrays, converting them recursively. Functions, undefined values, and symbols are omitted from the output. JSON.stringify is the counterpart to JSON.parse(), which converts JSON strings back to JavaScript objects, enabling seamless data serialization and deserialization.