JSONC Simple Parser

A simple JSON parser that supports comments and optional trailing commas.

Features

• Tiny:
  • It's ~3.5kb minified and gzipped, if you aren't already using RegHex, otherwise it's just ~2kb.
  • Even if you aren't using RegHex already (you should) that's ~32% smaller than VS Code's jsonc-parser and ~62% smaller than JSON5.
• Performant:
  • When parsing regular JSON it's ~10x faster than VS Code's jsonc-parser, ~70x faster than JSON5 and just as fast as the native JSON.parse.
  • When parsing JSON with comments or trailing commas it's just as fast as VS Code's jsonc-parser and ~6x faster than JSON5.
• Tested:
  • It passes all 274 tests regarding JSON from ECMA's test262 test suite.
  • The parser is obviously not spec compliant but this means that while adding support for comments and trailing commas probably nothing else got broken.

Install

npm install --save jsonc-simple-parser

Usage

import JSONC from 'jsonc-simple-parser';

const source = `
  { // This is an example
    "foo": 123,
    /* TRAILING COMMAS */
    "bar": [1, 2, 3,],
  }
`;

const result = {
  foo: 123,
  bar: [1, 2, 3]
};

JSONC.parse ( source ); // => returns an object that's deeply equal to `result`
JSONC.stringify ( result ); // => same as calling `JSON.stringify`

License

MIT © Fabio Spampinato