@darwino/darwino/src/JsonEquals.js

A set of Javascript classes and utilities

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//
// Deep compare 2 JSON objects
// Inspired from https://github.com/epoberezkin/fast-deep-equal
// MIT license
//
export default function jsonEquals(a, b) {
  	if (a === b) return true;
  	if (a && b && typeof a === 'object' && typeof b === 'object') {
    	if (Array.isArray(a)) {
      		const length = a.length;
      		if (length != b.length) return false;
      		for (let i = length; i-- !== 0;)
        		if (!jsonEquals(a[i], b[i])) return false;
      		return true;
    	}

    	const keys = Object.keys(a);
    	const length = keys.length;
    	if (length !== Object.keys(b).length) return false;

    	for (let i = length; i-- !== 0;) {
			if (!Object.prototype.hasOwnProperty.call(b, keys[i])) return false;
		}

    	for (let i = length; i-- !== 0;) {
   			const key = keys[i];
   			if (!jsonEquals(a[key], b[key])) return false;
  		}

    	return true;
  	}
 	 // true if both NaN, false otherwise
  	return a!==a && b!==b;
};