NJSON - next-json

Next JSON format

Why this package?

Because JSON is awesome, but...

JSON is awesome mainly for two reasons:

1. it offers an easy way to serialize and deserialize complex data;
2. a valid JSON encoded string can be pasted in a JavaScript source file, a really awesome feature while developing / debugging.

... but it has some limitations:

• do not supports undefined values,
• do not supports BigInt numbers,
• do not supports many other features...

This package is intended to offer something as great as JSON... trying to add something more.

NJSON Features

• ☑ extends JSON
• ☑ supports C style comments
• ☑ supports undefined
• ☑ supports -0, NaN and Infinity
• ☑ supports BigInt
• ☑ supports Date
• ☑ supports RegExp
• ☐ supports Error
• ☐ supports circular references

NJSON extends JSON

This doesn't mean it's 100% compliant: due its higher number of supported features the result string of the serialization through NJSON.stringify may differs from the result of the serialization through JSON.stringify.

On the other hand, the result of the deserialization of a valid JSON encoded string through NJSON.parse will produce a value deep equal to the value produced by JSON.parse.

Installation

With npm:

npm install --save next-json

Usage

JavaScript

import { NJSON, NjsonParseOptions, NjsonStringifyOptions } from "next-json";

const serialized = NJSON.stringify({ some: "value" });
const deserialized = NJSON.parse(serialized);

TypeScript

import { NJSON, NjsonParseOptions, NjsonStringifyOptions } from "next-json";

const serialized: string = NJSON.stringify({ some: "value" });
const deserialized: { some: string } = NJSON.parse<{ some: string }>(serialized);

NJSON.parse(text[, reviver])

Just for compatibility with JSON.parse. Alias for:

NJSON.parse(value, { reviver });

NJSON.parse(text[, options])

• text <string> The text to deserialize.
• options <NjsonParseOptions> Deserialization options.
• Returns: <unknown> The value result of the deserialization of the NJSON encoded text.

NJSON.stringify(value[, replacer[, space]])

Just for compatibility with JSON.stringify. Alias for:

NJSON.stringify(value, { replacer, space });

NJSON.stringify(value[, options])

• value <unknown> The value to serialize.
• options <NjsonStringifyOptions> Serialization options.
• Returns: <string> The NJSON encoded serialized form of value.

interface NjsonParseOptions

• reviver: <Function> Alters the behavior of the deserialization process. Default: null.

reviver

As the reviver parameter of JSON.parse.

interface NjsonStringifyOptions

• date: <string> Specifies Dates conversion method. Default: "time".
• replacer: <Function> | <Array> Alters the behavior of the serialization process. Default: null.
• space: <number> | <string> Specifies the indentation. Default: null.
• undef: <boolean> Specifies the undefined behavior. Default: true.

date

Specifies the method of Date objects used to serialize them. Follows the list of the allowed values and the relative method used.

• "iso": Date.toISOString()
• "string": Date.toString()
• "time": Date.getTime() - the default
• "utc": Date.toUTCString()

replacer

As the replacer parameter of JSON.serialize.

space

As the space parameter of JSON.serialize.

undef

For default NJSON.stringify serializes undefined values as well. If set to false, undefined values are treated as JSON.stringify does.

Compatibility

Requires Node.js v14.

The package is tested under all Node.js versions currently supported accordingly to Node.js Release.

TypeScript

TypeScript types are distributed with the package itself.

License

MIT License

Bugs

Do not hesitate to report any bug or inconsistency @github.

Donating

If you find useful this package, please consider the opportunity to donate some satoshis to this bitcoin address: 1Md9WFAHrXTb3yPBwQWmUfv2RmzrtbHioB

See also

Other projects which aim to solve similar problems:

• arson by Ben Newman
• devalue by Rich Harris
• jsesc by Mathias Bynens
• lave by Jed Schmidt
• oson by Steffen Trog
• serialize-javascript by Eric Ferraiuolo
• superjson by Blitz
• tosource by Marcello Bastéa-Forte