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JSON (JavaScript Object Notation)

JSON (JavaScript Object Notation)

JSON is a lightweight data format that is often used to exchange data between a web application and a server. It is a text-based format that is easy to read and write. JSON is based on the JavaScript object syntax, so it is easy to convert JSON data to JavaScript objects and vice versa.

Key Features of JSON

  • Lightweight: JSON is a very lightweight data format. This makes it ideal for use in web applications, where bandwidth is a concern.
  • Easy to read and write: JSON is a text-based format that is easy to read and write. This makes it easy to debug JSON data.
  • Based on JavaScript object syntax: JSON is based on the JavaScript object syntax. This makes it easy to convert JSON data to JavaScript objects and vice versa.
  • Supported by all major browsers: JSON is supported by all major browsers. This makes it a versatile data format that can be used in a variety of web applications.

Using JSON in Web Applications

JSON is often used to exchange data between a web application and a server. This data can include user input, form data, or data from a database. JSON is also used to store data in local storage.

Example

The following is an example of a JSON object:

{
  "name": "John Doe",
  "age": 30,
  "occupation": "Software Engineer"
}

This JSON object can be converted to a JavaScript object using the following code:

const person = JSON.parse('{"name": "John Doe", "age": 30, "occupation": "Software Engineer"}');

The person object can then be used to access the data in the JSON object. For example, the following code would print the name of the person:

console.log(person.name); // Output: John Doe
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