Question

I have assigned 5000 ms to Settimeout but it is executing before assigned time interval.Can any body explain why it is happening.

<script type="text/javascript">
        var getcallback = {
            closure: function (callback, functionparam) {
                return callback.call(functionparam);
            }
        }
        var cleartimeout;
        var startSlideShow =  {
            timerid: 5000,
            startAnimation: function () {
                cleartimeout = setTimeout(getcallback.closure(function () {
                    alert("this is a basic example of chaining methods");
                    this.startAnimation();
                },this), this.timerid);
            },
            stopAnimation:function(){
            }
        }
        startSlideShow.startAnimation();

    </script>

Answer 1

Because getcallback.closure() is executing the function right away, you are not storing a reference to a function to call at a later time.