context

var simpleObject = {
    property: 4, 
    method: function () {
      console.log(this.property);
    }
  };
  
  var simpleFunction = function() {
   this.property = 5;
   (function() {
     this.property = 3;
   })();
   console.log(this.property);
  };
  
  
  
  simpleFunction();
  new simpleFunction();
  simpleObject.method();
  new simpleObject.method();
  simpleFunction.call(simpleFunction);
  simpleObject.method.call(simpleFunction);