@titanium/json5 NPM

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@titanium/json5

Titanium native mobile module for JSON5 - JSON for Humans. Based on https://github.com/json5/json5

📝 Description

JSON5 – JSON for Humans

The JSON5 Data Interchange Format (JSON5) is a superset of JSON that aims to alleviate some of the limitations of JSON by expanding its syntax to include some productions from ECMAScript 5.1.

🚀 Getting Started

Install using npm:

npm install @titanium/json5

Usage

const JSON5 = require('@titanium/json5');  // or use require('json5');
JSON5.parse();
JSON5.stringify();

Short Example

{
  // comments
  unquoted: 'and you can quote me on that',
  singleQuotes: 'I can use "double quotes" here',
  lineBreaks: "Look, Mom! \
No \\n's!",
  hexadecimal: 0xdecaf,
  leadingDecimalPoint: .8675309, andTrailing: 8675309.,
  positiveSign: +1,
  trailingComma: 'in objects', andIn: ['arrays',],
  "backwardsCompatible": "with JSON",
}

Features

The following ECMAScript 5.1 features, which are not supported in JSON, have been extended to JSON5.

Objects

Object keys may be an ECMAScript 5.1 IdentifierName.
Objects may have a single trailing comma.

Arrays

Arrays may have a single trailing comma.

Strings

Strings may be single quoted.
Strings may span multiple lines by escaping new line characters.
Strings may include character escapes.

Numbers

Numbers may be hexadecimal.
Numbers may have a leading or trailing decimal point.
Numbers may be IEEE 754 positive infinity, negative infinity, and NaN.
Numbers may begin with an explicit plus sign.

Comments

Single and multi-line comments are allowed.

White Space

Additional white space characters are allowed.

API

The JSON5 API is compatible with the JSON API.

JSON5.parse()

Parses a JSON5 string, constructing the JavaScript value or object described by the string. An optional reviver function can be provided to perform a transformation on the resulting object before it is returned.

Syntax

JSON5.parse(text[, reviver])

Parameters

text: The string to parse as JSON5.
reviver: If a function, this prescribes how the value originally produced by parsing is transformed, before being returned.

Return value

The object corresponding to the given JSON5 text.

JSON5.stringify()

Converts a JavaScript value to a JSON5 string, optionally replacing values if a replacer function is specified, or optionally including only the specified properties if a replacer array is specified.

Syntax

JSON5.stringify(value[, replacer[, space]])
JSON5.stringify(value[, options])

Parameters

value: The value to convert to a JSON5 string.
replacer: A function that alters the behavior of the stringification process, or an array of String and Number objects that serve as a whitelist for selecting/filtering the properties of the value object to be included in the JSON5 string. If this value is null or not provided, all properties of the object are included in the resulting JSON5 string.
space: A String or Number object that's used to insert white space into the output JSON5 string for readability purposes. If this is a Number, it indicates the number of space characters to use as white space; this number is capped at 10 (if it is greater, the value is just 10). Values less than 1 indicate that no space should be used. If this is a String, the string (or the first 10 characters of the string, if it's longer than that) is used as white space. If this parameter is not provided (or is null), no white space is used. If white space is used, trailing commas will be used in objects and arrays.
options: An object with the following properties:
- replacer: Same as the replacer parameter.
- space: Same as the space parameter.
- quote: A String representing the quote character to use when serializing strings.

Return value

A JSON5 string representing the value.

Node.js `require()` JSON5 files

When using Node.js, you can require() JSON5 files by adding the following statement.

require('json5/lib/register')

Then you can load a JSON5 file with a Node.js require() statement. For example:

const config = require('./config.json5')

🔗 Related Links

Titanium Mobile - Open-source tool for building powerful, cross-platform native apps with JavaScript.
Alloy - MVC framework built on top of Titanium Mobile.
Appcelerator - Installer for the Appcelerator Platform tool
JSON5 - JSON5 Home Page

📚 Learn More

Axway Developer Portal

📣 Feedback

Have an idea or a comment? Join in the conversation here!

©️ Legal

License

MIT. See license.md for details.

Credits

Assem Kishore founded this project.

Michael Bolin independently arrived at and published some of these same ideas with awesome explanations and detail. Recommended reading: Suggested Improvements to JSON

Douglas Crockford of course designed and built JSON, but his state machine diagrams on the JSON website, as cheesy as it may sound, gave us motivation and confidence that building a new parser to implement these ideas was within reach! The original implementation of JSON5 was also modeled directly off of Doug’s open-source json_parse.js parser. We’re grateful for that clean and well-documented code.

Max Nanasy has been an early and prolific supporter, contributing multiple patches and ideas.

Andrew Eisenberg contributed the original stringify method.

Jordan Tucker has aligned JSON5 more closely with ES5, wrote the official JSON5 specification, completely rewrote the codebase from the ground up, and is actively maintaining this project.

Alloy is made available under the Apache Public License, version 2. See their license file for more information.

Appcelerator is a registered trademark of Appcelerator, Inc. Titanium is a registered trademark of Appcelerator, Inc. Please see the LEGAL information about using trademarks, privacy policy, terms of usage and other legal information at http://www.appcelerator.com/legal.