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HTML 

              
                <span id="textS">GSAP</span>
<div id='box' class="box"></div>
<div class='desc'>
  GSAP Debouncing :<br>
  pls resize the window to stop / play Tween
</div>





<img id='logo' src="http://gravatar.com/avatar/5a224f121f96bd037bf6c1c1e2b686fb?s=256" height="70" width="70">
<div id='links'>
<a id='twitter' href="https://twitter.com/Diaco_ml" target="_blank"><span class='fa fa-twitter'></span></a>
<div id='pens'><a href="https://codepen.io/collection/DgYoEw/" target="_blank"><span class='fa fa-codepen'></span></a> my other Pens</div>
</div>
!

CSS 

              
                @import url(https://fonts.googleapis.com/css?family=Oswald);

body{  
  background-color: #111; 
  width:100%;
  height:100%;
  overflow:hidden;
}

.box {  
  width: 150px;  height: 150px;  
  border-radius:10px;
  background-color: #88CE02; 
  position:absolute;
  transform:translate(-50%,-50%);
  left:50%; top:50%;
}
#textS{ 
  color:#000;
  position:absolute; left:50%; top:50%; transform:translate(-50%,-50%);
  font-family:'Oswald', tahoma; font-size:40vw;
  text-align:center; white-space: nowrap;
  color:#000;
  opacity:0.5;
}

.desc{
  position:absolute;
  top:10px;left:10px;
  color:#eee;
  font-size:17px;
  font-family:arial;
}

#logo {
  border-radius: 50%; 
  position:absolute;
  z-index:5000;
  top:20px; right:20px;
}


#links{z-index:9999; position:absolute;bottom:0px;left:0px;width:100%;height:50px;font-size:13px;font-family:tahoma;color:#fff;}
#links a{text-decoration:none;font-size:2.3em;color:#fff;}
#twitter{position:absolute;bottom:15px;right:20px;}
#pens{position:absolute;bottom:15px;left:20px;}
!

JS 

              
                /* 
a Pen by DIACO : twitter.com/Diaco_ml || codepen.io/MAW
powered by GSAP : https://www.greensock.com/
..........................................................
GsDebouncing , a simple way with GSAP api to call functions at the Start and End of Events like Scrolling and Resizing , ... etc 

conf object :
fn1 = Function to call at Start ;
fn2 = Function to call at End ;
dur = Duration of Debouncing , by defult = 0.2 ;
*/


function GsDebouncing(conf){
  var T = this ;
  T.dur = conf.dur || 0.2 ;
  T.f1 = conf.f1 || function(){} ;
  T.f2 = conf.f2 || function(){} ;
  T.toggle = 1;
  T.tw = TweenLite.delayedCall( T.dur , function(){ T.f2(); T.toggle=1; }).paused(true);
  T.run = function(){
    if( T.toggle ){ T.f1(); T.toggle=0; }; 
    if( !T.toggle ){ T.tw.restart(true) };
  }
  return T
};

/////////////////////////////////////////////////
/// Usage Examle :

var Tween = TweenMax.to('.box',2,{rotation:360,repeat:-1,ease:Linear.easeNone});
// you can use timeline too 

var myDebouncing = new GsDebouncing({
  f1 : function(){ Tween.pause() } ,
  f2 : function(){ Tween.play() }  ,
});
         
window.addEventListener('resize',myDebouncing.run) ;
document.addEventListener('scroll',myDebouncing.run) ;
!
999px

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