JavaScript - Compare two Objects are same or not Best & Simple way

gistfile1.txt

function equal(obj1, obj2) {

	let keys =  Object.keys(obj1); // first find keys of first Object
	let output = false;
	for (let i = 0 ; i < keys.length ; i++) {
			output = (obj2.hasOwnProperty(keys[i]) && obj1[keys[i]] == obj2[keys[i]]) ? true : false;
	}
	return output;

}


var o1 = {b : 1, c : 2};
var o2 = {b: 1, c : 2};

equal(o1, o2);  --> true


var o1 = {b : 1, c : 2};
var o2 = {b: 1, c : 2 , d: 4};

equal(o1, o2);  --> false