jQuery $(window).resize(); equivalent event listener, that only fires on a specified axis change?

You can save the width of the browser on a window load in variable. Example:

var w = 0;

$( window ).load( function(){

   w = $( window ).width();

});

$( window ).resize( function(){

  if( w != $( window ).width() ){

    //Do something

    w = $( window ).width();


  }

});

How about using like this?

var w = $(window).width();
$(window).resize(function(){
  if ($(window).width()==w) return; 
  w = $(window).width();
  // ... your code
});