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1 JSON in JavaScript
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2
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3
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4 Douglas Crockford
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5 douglas@crockford.com
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6
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7 2010-11-18
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8
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9
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10 JSON is a light-weight, language independent, data interchange format.
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11 See http://www.JSON.org/
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12
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13 The files in this collection implement JSON encoders/decoders in JavaScript.
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14
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15 JSON became a built-in feature of JavaScript when the ECMAScript Programming
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16 Language Standard - Fifth Edition was adopted by the ECMA General Assembly
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17 in December 2009. Most of the files in this collection are for applications
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18 that are expected to run in obsolete web browsers. For most purposes, json2.js
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19 is the best choice.
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20
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21
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22 json2.js: This file creates a JSON property in the global object, if there
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23 isn't already one, setting its value to an object containing a stringify
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24 method and a parse method. The parse method uses the eval method to do the
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25 parsing, guarding it with several regular expressions to defend against
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26 accidental code execution hazards. On current browsers, this file does nothing,
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27 prefering the built-in JSON object.
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28
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29 json.js: This file does everything that json2.js does. It also adds a
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30 toJSONString method and a parseJSON method to Object.prototype. Use of this
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31 file is not recommended.
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32
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33 json_parse.js: This file contains an alternative JSON parse function that
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34 uses recursive descent instead of eval.
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35
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36 json_parse_state.js: This files contains an alternative JSON parse function that
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37 uses a state machine instead of eval.
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38
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39 cycle.js: This file contains two functions, JSON.decycle and JSON.retrocycle,
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40 which make it possible to encode cyclical structures and dags in JSON, and to
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41 then recover them. JSONPath is used to represent the links.
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42 http://GOESSNER.net/articles/JsonPath/
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