text - Jquery slider if not working -

i trying catch if when text going left : 0px it's not working :< tip thankfully.

   <script src="_js/jquery-1.12.0.min.js"></script>   <script src="_js/jquery-ui.min.js"></script>   <script src="_js/code.js"></script>  <div class="container-for-slider">           <ul class="slides">             <li  class="slide">witam na stronie głównej</li>             <li  class="slide">strona cały czas się rozwija</li>             <li  class="slide">nowe pomysły nowe możliwości</li>           </ul>         </div>    

https://jsfiddle.net/hqp0w778/1/

setinterval(function () {        $('.container-for-slider .slides').animate({'left':'-=500px'}, 5000, function () {          if($('.container-for-slider .slides').position().left == '0px'){          alert('lol');      }      });      }, 1000); 

result of $('.container-for-slider .slides').position().left integer. try this:

if ($('.container-for-slider .slides').position().left == 0)

i notice when testing .position().left not return 0 ever: https://jsfiddle.net/twisty/hqp0w778/2/

$(document).ready(function() {   setinterval(function() {     $('.container-for-slider .slides').animate({       'left': '-=300px'     }, 5000, function() {       console.log("position:", $('.container-for-slider .slides').position().left);       if ($('.container-for-slider .slides').position().left === 0) {         alert('lol');       }     });   }, 1000); });