json-stringify-deterministic/lib/util.js

deterministic version of JSON.stringify() so you can get a consistent hash from stringified results.

'use strict'

module.exports = {
  isArray: Array.isArray,
  assign: Object.assign,
  isObject: v => typeof v === 'object',
  isFunction: v => typeof v === 'function',
  isBoolean: v => typeof v === 'boolean',
  isRegex: v => v instanceof RegExp,
  keys: Object.keys
}