json.md

⚑ JSON:

JSON (JavaScript Object Notation) is a lightweight data-interchange format. It is easy for developer to read and write, and easy for machines to parse and generate. It is often used to transmit data between a server and a client web application, or between different parts of a web application.

☴ Overview:

1. Parsing and Manipulating

✦ Parsing and Manipulating:

JSON syntax is based on JavaScript object literals. It consists of key-value pairs. which is enclose with curly braces {} for objects, and square brackets [] for arrays.

Syntax:

{
  "name": "Kumar",
  "age": 30,
  "city": "Chennai"
}

Methods Involved and Used on JSON: It has built-in methods, which is provided in JavaScript to work with JSON:

• JSON.parse(): Parses a JSON string into a JavaScript object.
• JSON.stringify(): Converts a JavaScript object into a JSON string.

Parsing:

let jsonString = '{"name": "Kumar", "age": 30}';
let jsonObject = JSON.parse(jsonString);
console.log(jsonObject.name); // Output: Kumar

Manipulating:

jsonObject.age = 31;
jsonObject.city = "Chennai";

Convert back into JSON:

let newJsonString = JSON.stringify(jsonObject);
console.log(newJsonString);

Usages of JSON:

• Data exchange: It is commonly used to transmit data between a server and client.
• Data storage: It can be used to store data locally in the browser using localStorage or sessionStorage.
• Configuration files: It is often used for configuration files due to its human-readable format and easy for machine to parsing.
• API responses: Most of APIs return data in JSON format.

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