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🧾 JSON Fundamentals

JSON stands for JavaScript Object Notation. It is a text format used to represent structured data in a way that humans and programs can both read.

What JSON Looks Like

Example: JSON Data

{
  "name": "TypeLand",
  "topicCount": 14,
  "published": true,
  "tags": ["typescript", "coding", "json"]
}

Important JSON Rules

Keys use double quotes
Strings use double quotes
JSON can hold objects, arrays, numbers, booleans, strings, and null
JSON cannot store functions

Convert Between Objects and JSON

Example: Stringify and Parse

const user = {
  name: "Ava",
  score: 98,
};

const jsonText = JSON.stringify(user, null, 2);
console.log(jsonText);

const parsedUser = JSON.parse(jsonText);
console.log(parsedUser.name);

🎯 Key Ideas

JSON is a data format, not a programming language
APIs commonly send and receive JSON
JSON.stringify() turns an object into JSON text
JSON.parse() turns JSON text into data your program can use

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