Term	Description
JSON	Approach to preset JavaScript object as text (can be stored as string type in JavaScript VM). So: when we create some object in source code using `var object = { ... }` we can call `{ ... }` part as JSON - it will be converted automatically to `object` after program is run / compiled. We can say: object was created using JavaScript Object Notation, when we do `fetch(...)` / AJAX request and we recive response with `Content-Type: application/json`. We can say: we recived JSON that should be parsed to object. when we store `{ ... }` in text file or send as message we can call it JSON.
object	Stored in memory data strucure.
JSON to string conversion	Operation that deserilises / converts text to object. We can do it in few ways: with `JSON.parse('{}')` method that parses JSON to object, with built-in parse method in `fetch(...)` result: `var object = fetchResult.json()` Method `json()` returns object created from JSON. setting `json` value for `responseType` property during using `XMLHttpRequest` / `XHR` that makes response conversion to object.

Quick solution:

// ONLINE-RUNNER:browser;

var json = '{"id": 2, "name": "Tom", "age": 25}';
var object = JSON.parse(json);

console.log(object);         // [object Object]

console.log(object.id);      // 2
console.log(object.name);    // Tom
console.log(object.age);     // 25

console.log(object.address); // undefined

Alternative titles

JavaScript - convert json to object

JavaScript - parse json

Alternative titles

JavaScript - JSON

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