Very basic timeoutCheck based javascript data watcher

tryout.js

w = 2;
var watcher = new Watcher(
  'utag.handler.iflag',
  function(name, o, n, t){
      console.log('name: ' + name + '  old: ' + o + '  new: ' + n);
      if(n === 1){
          clearTimeout(t);
          console.log('exito');
      }
  },
  3000,
  function(name){
      console.log('timeout para la variable: ' + name);
      console.log('fracaso');
  }
);

watcher.js

function Watcher(name, onChange, time, onTimeout){
    var _self = this;
    _self.watched = []
    _self.add = function(name, onChange){
       if(name){
           var watch = {
               name: name,
               oldVal: _self.getVal(name),
               timeout: 'undefined'
           };
           if(!onChange) watch.onChange = function(name, o, n, t){
               console.log('name: ' + name + '  old: ' + o + '  new: ' + n);
               clearTimeout(t);
           }
           if(onTimeout) watch.timeout = setTimeout(function(){onTimeout(name);}, time);
           if(!watch.oldVal) console.error('variable sin definir: ' + name);
           else _self.watched.push(watch);
       }
       else {
           console.error('no se declaro nombre o onChange');
           console.error(name);
           console.error(onChange);
       }
    };
    _self.remove = function(name){
        _self.watched.forEach(function(v,i,a){
            if(v.name === name){
                var v = _self.watched.splice(i,1);
                clearTimeout(v.timeout);
            }
        });
    };
    _self.getVal = function(name){
        var path = name.split('.');
        var last = window;
        for(var i=0; i<path.length; i++){
            last = last[path[i]];
            if(!last) {
                return null;
            }
        }
        return last;
    };
    if(name){
        _self.add(name, onChange);
    }
    setInterval(function(){
        _self.watched.forEach(function(v,i,a){
            var newVal = _self.getVal(v.name);
            if(newVal != v.oldVal){
                var oldVal = _self.watched[i].oldVal;
                _self.watched[i].oldVal = newVal;
                v.onChange(v.name, oldVal, newVal, v.timeout);
            }
        });
    }, time);
    
}