JavaScript JSON
Introduction
JSON (JavaScript Object Notation) is a lightweight data-interchange format. It is easy for humans to read and write and easy for machines to parse and generate. It is important to realize that, in JavaScript, JSON is a string and not an object.
A basic overview can be found on the json.org website which also contains links to implementations of the standard in many different programming languages.
Syntax
- JSON.parse(input[, reviver])
- JSON.stringify(value[, replacer[, space]])
Parameters
| Parameter | Details |
|---|---|
| JSON.parse | Parse a JSON string |
input(string) | JSON string to be parsed. |
reviver(function) | Prescribes a transformation for the input JSON string. |
| JSON.stringify | Serialize a serializable value |
value(string) | Value to be serialized according to the JSON specification. |
replacer(function or String[] or Number[]) | Selectively includes certain properties of the value object. |
space(String or Number) | If a number is provided, then space number of whitespaces will be inserted of readability. If a string is provided, the string (first 10 characters) will be used as whitespaces. |
Remarks
The JSON utility methods were first standardized in ECMAScript 5.1 ยง15.12.
The format was formally defined in The application/json Media Type for JSON (RFC 4627 July 2006) which was later updated in The JSON Data Interchange Format (RFC 7158 March 2013, ECMA-404 October 2013 and RFC 7159 March 2014).
To make these methods available in old browsers such as Internet Explorer 8, use Douglas Crockford's json2.js.
