JSON in Action: JavaScript Examples [Part 1]

Publicado el: 28 mayo 2025
en el canal de: Компьютерная Академия top

177

JSON (JavaScript Object Notation) is a text format for storing and transmitting data. It's like a "language" understood by both humans and computers. Imagine you want to send a friend user information: name, age, email. In JSON, it would look like this:

{
"name": "Anna",
"age": 25,
"email": "anna@example.com",
"hobbies": ["drawing", "guitar"]
}

How is JSON structured?

— Data is stored in key:value pairs (e.g., "name": "Anna").
— Keys are always in quotation marks, values can be a string, a number, true/false, an array (in square brackets []), or another object (in curly braces {}).
— All together, they're called a JSON object.

What is JSON used for?

— Data transmission. For example, when you fill out a form on a website, the data is often sent to the server in JSON format.
— Storing settings. Many programs save configurations in JSON files.
— Exchanging data between applications. For example, a weather app receives data from the server in JSON format and displays it to you.

Why is JSON so popular?

— Simplicity. It's easy to read, even for a beginner.
— Versatility. JSON is supported by almost all programming languages (not just JavaScript!).
— Compactness. It has fewer unnecessary characters than XML (another data format).

JSON in JavaScript

JS has two methods for working with JSON:

1. JSON.stringify() — converts a JS object to a JSON string

const user = { name: "Anna", age: 25 };
const jsonUser = JSON.stringify(user); // '{"name":"Anna","age":25}'

2. JSON.parse() — converts a JSON string back to a JS object

const parsedUser = JSON.parse(jsonUser); // { name: "Anna", age: 25 }

Important! JSON is not code, but data. You cannot write functions or comments in it, only structured information.

En esta página del sitio puede ver el video en línea JSON in Action: JavaScript Examples [Part 1] de Duración hora minuto segunda en buena calidad , que subió el usuario Компьютерная Академия top 28 mayo 2025, comparta el enlace con amigos y conocidos, en youtube este video ya ha sido visto 177 veces y le gustó like a los espectadores. Disfruta viendo!

4,511