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JSON Tutorial


JSON

JSON: JavaScript Object Notation.

JSON is syntax for storing and exchanging text information. Much like XML.

JSON is smaller than XML, and faster and easier to parse.

JSON Example

{
"employees": [
{ "firstName":"John" , "lastName":"Doe" },
{ "firstName":"Anna" , "lastName":"Smith" },
{ "firstName":"Peter" , "lastName":"Jones" }
]
}

The employees object is an array of 3 employee records (objects).

What is JSON?

  • JSON stands for JavaScript Object Notation
  • JSON is lightweight text-data interchange format
  • JSON is language independent *
  • JSON is "self-describing" and easy to understand
* JSON uses JavaScript syntax for describing data objects, but JSON is still language and platform independent. JSON parsers and JSON libraries exists for many different programming languages.

JSON - Evaluates to JavaScript Objects

The JSON text format is syntactically identical to the code for creating JavaScript objects.

Because of this similarity, instead of using a parser, a JavaScript program can use the built-in eval() function and execute JSON data to produce native JavaScript objects.


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