JSON in Action: JavaScript Examples [Part 1]
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.
Sur cette page du site, vous pouvez voir la vidéo en ligne JSON in Action: JavaScript Examples [Part 1] durée heure minute seconde en bonne qualité , qui a été Téléchargé par l'utilisateur Компьютерная Академия top 28 mai 2025, Partagez le lien avec vos amis et connaissances, sur youtube cette vidéo a déjà été regardée 177 fois et il a aimé like téléspectateurs. Bon visionnage!
