Minimal debounce in JS - http://codepen.io/franklinjavier/pen/Ebpsj

debounce.js

function debounce( e, callback, ms ) {

  switch( e.type ) {

    case 'mouseover':

      try {
        window.timeoutId = setTimeout( callback, ms );
      } catch( evt ) {
        console.error( evt );
      }

      break;

    case 'mouseout':

      if ( window.timeoutId ) {
        clearTimeout( window.timeoutId );
        return false;
      }

      break;

  }

}

example.md

<div></div>
<div></div>
<div></div>
<div></div>

function myCallback() {
  console.log('beep boop');
}

$('div')
.on('mouseover', function(e){ 
  debounce( e, myCallback, 1000 ); 
})
.on('mouseout', function(e){ 
  debounce( e ); 
});