JS Deep Equal Objects

deep-equal.js

function deepEqualObjects(a,b) {
  for(var prop in a) {
    if(!deepEqual(a[prop],b[prop])) {
      return false;
    }
  }
  for(var prop in b) {
    if(!deepEqual(a[prop],b[prop])) {
      return false;
    }
  }
  return true;
}

function deepEqual(a, b) {
  if (typeof(a) == 'object' && typeof(b) == 'object') {
    return deepEqualObjects(a,b);
  } else if (typeof(a) != 'object' && typeof(b) != 'object') {
    return a == b;
  } else {
    return false;
  }
}


console.log(deepEqual(1, 1));
// → true
console.log(deepEqual(1, 2));
// → false
console.log(deepEqual(1, {}));
// → false
console.log(deepEqual(1, {name: "BV"}));
// → false
console.log(deepEqual({}, {}));
// → true
console.log(deepEqual({name: "BV"}, {name: "BV"}));
// → true
console.log(deepEqual({name: "BV", age: 16}, {name: "BV"}));
// → false
console.log(deepEqual({name: "BV"}, {name: "BV", age: 16}));
// → false
console.log(deepEqual({name: "BV", age: 16}, {name: "BV", age: 16}));
// → true
console.log(deepEqual({name: "BV", age: 16}, {name: "BV", age: 17}));
// → false

var obj = {here: {is: "an"}, object: 2};
console.log(deepEqual(obj, obj));
// → true
console.log(deepEqual(obj, {here: 1, object: 2}));
// → false
console.log(deepEqual(obj, {here: {is: "an"}, object: 2}));
// → true