日本語のREADMEはこちらです: README.ja.md

JSON5 is an extension to the popular JSON file format that aims to be easier to write and maintain by hand (e.g. for config files). It is not intended to be used for machine-to-machine communication.

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

• Object keys may be an ECMAScript 5.1 IdentifierName.
• Objects may have a single trailing comma.
• Arrays may have a single trailing comma.
• Strings may be single quoted.
• Strings may span multiple lines by escaping new line characters.
• Strings may include character escapes.
• 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.
• Single and multi-line comments are allowed.
• Additional white space characters are allowed.

For a detailed explanation of the JSON5 format, please read the official specification.

import { JSON5 } from "https://code4fukui.github.io/JSON5/JSON5.js";

const s = `{
  a: "abc", // comment
  b: 123, /* comment */
}`;

const obj = JSON5.parse(s);
console.log(obj);
const s2 = JSON5.stringify(obj);
console.log(s2);

This package includes a CLI for converting JSON5 to JSON and for validating the syntax of JSON5 documents.

When contributing code, please write relevant tests and run npm test and npm run lint before submitting pull requests.

To report security vulnerabilities, please contact the maintainers directly.