JSON5 - Data notation

JSON5 is an open source data notation created in 2012 by Aseem Kishore.

#82on PLDB

12Years Old

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Download source code:

git clone https://github.com/json5/json5

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.

Tags: dataNotation
JSON5 is developed on GitHub and has 6,409 stars
There are at least 0 JSON5 repos on GitHub
JSON5 is a superset of JSON
Early development of JSON5 happened in https://github.com/json5
JSON5 is written in JavaScript, Markdown, TypeScript, JSON, JSON5, YAML
GitHub supports syntax highlighting for JSON5
json5.org was registered in 2011
11 PLDB concepts link to JSON5: Ace Editor, Avail, chevrotain, cloc, Differential Datalog, Idio, JSON5, Mastodon, MDX, Openverse, Prettier

Example from the web:

{
  // 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",
}

Example from Linguist:

/*
 * The following is a contrived example, but it illustrates most of the features:
 */

{
    foo: 'bar',
    while: true,

    this: 'is a \
multi-line string',

    // this is an inline comment
    here: 'is another', // inline comment

    /* this is a block comment
       that continues on another line */

    hex: 0xDEADbeef,
    half: .5,
    delta: +10,
    to: Infinity,   // and beyond!

    finally: 'a trailing comma',
    oh: [
        "we shouldn't forget",
        'arrays can have',
        'trailing commas too',
    ],
}

Language features

Feature	Supported	Example	Token
MultiLine Comments	✓	/* A comment */	/* */
Comments	✓	// A comment
Line Comments	✓	// A comment	//
Semantic Indentation	X