JS Tutorial

JavaScript JSON 📦

JSON (JavaScript Object Notation) is a lightweight format for storing and transporting data. It's often used when data is sent from a server to a web page.

🔎 JSON Syntax

• Data is in name/value pairs.
• Data is separated by commas.
• Curly braces {} hold objects.
• Square brackets [] hold arrays.

{
  "name": "Technorank",
  "type": "Tutorial",
  "topics": ["HTML", "CSS", "JavaScript"]
}

🔁 Converting Between JSON and JavaScript

1. JSON to JavaScript Object

let jsonString = '{"name":"Aman", "age":22}';
let obj = JSON.parse(jsonString);
console.log(obj.name); // Aman

2. JavaScript Object to JSON

let jsObj = { course: "JavaScript", duration: "4 weeks" };
let jsonData = JSON.stringify(jsObj);
console.log(jsonData); // {"course":"JavaScript","duration":"4 weeks"}

🧪 Try It Yourself

✅ When to Use JSON

• Communicating with APIs
• Saving structured data
• Configuration files