compare two objects in javascript

gistfile1.txt

compareObjects = function(obj1, obj2, callback) {
  var paramName;
  
  var compare = function(objA, objB, param) {
    var paramObjA = objA[param]
      , paramObjB = (typeof objB[param] === 'undefined') ? false : objB[param];
    
    switch (typeof objA[param]) {
      case "object" : return (compareObjects(paramObjA, paramObjB));
      case "function" : return (paramObjA.toString() === paramObjB.toString());
      default: return (paramObjA === paramObjB);
    }
  }
  
  for (paramName in obj1) {
    if (typeof obj2[paramName] === 'undefined' || !compare(obj1, obj2, paramName)) {
      callback(false);
      return;
    }
  }

  for (paramName in obj2) {
    if (typeof obj1[paramName] === 'undefined' || !compare(obj1, obj2, paramName)) {
      callback(false);
      return;
    }
  }
  
  callback(true);
  return;
}

// USAGE


var obj1 = {attr1: 'var0', attr2: 'var2'};
var obj2 = {attr1: 'var1', attr2: 'var2'};
var obj3 = {attr1: 'var1', attr2: 'var2'};

compareObjects(obj1, obj2, function(bool) {
  console.log(bool);
  // false
})

compareObjects(obj2, obj3, function(bool) {
  console.log(bool);
  // true
})