Tag: javascript json parse

Javascript JSON.parse()

A common use of JSON is to exchange data to/from a web server.

When receiving data from a web server, the data is always a string.

Parse the data with JSON.parse(), and the data becomes a JavaScript object.

Example – Parsing JSON

Imagine we received this text from a web server:

'{"name":"John", "age":30, "city":"New York"}'

Use the JavaScript function JSON.parse() to convert text into a JavaScript object:

const obj = JSON.parse('{"name":"John", "age":30, "city":"New York"}');

Make sure the text is in JSON format, or else you will get a syntax error.

Use the JavaScript object in your page: Continue reading Javascript JSON.parse()

Javascript JSON – Introduction

JSON Example

This example is a JSON string:

'{"name":"John", "age":30, "car":null}'

It defines an object with 3 properties:

  • name
  • age
  • car

Each property has a value.

If you parse the JSON string with a JavaScript program, you can access the data as an object:

let personName = obj.name;
let personAge = obj.age;

Continue reading Javascript JSON – Introduction

JavaScript JSON

JSON is a format for storing and transporting data.

JSON is often used when data is sent from a server to a web page.

What is JSON?

  • JSON stands for JavaScript Object Notation
  • JSON is a lightweight data interchange format
  • JSON is language independent *
  • JSON is “self-describing” and easy to understand

* The JSON syntax is derived from JavaScript object notation syntax, but the JSON format is text only. Code for reading and generating JSON data can be written in any programming language. Continue reading JavaScript JSON