javascript - JQuery Content Arrow Navigation -

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i've been in trouble code: http://jsfiddle.net/xarlyblack/4wsx3zkx/

i want jquery fadein/out content navigation.

it works when go next div , again. when i'm in last div , click next, content disappears (why had created if statement return first). happens same when i'm in first div , click previous, want go last div.

i tried .last() / .first() .find()eq(). goes. think i'm missing something.

jquery code:

var ilust = $('.ilust');  var wrapper = ilust.find('.pag-ilust');  var pag = wrapper.find('.pag');  var btn = ilust.find('.nav-btn');    btn.click(function(){      if ($(this).hasclass('nav-next')){          var currentpag = $('.active-pag');          var nextpag = currentpag.next();          currentpag.fadeout('fast').removeclass('active-pag');          nextpag.fadein('slow').addclass('active-pag');          if (nextpag = false){              nextpag = pag.first();          }      } else if ($(this).hasclass('nav-prev')){          currentpag = $('.active-pag');          prevpag = currentpag.prev();          currentpag.fadeout('fast').removeclass('active-pag');          prevpag.fadein('slow').addclass('active-pag');      }  });

you need see whether next/prev returned element using length, need try fetch next/prev element , if not present need assign default value.

var ilust = $('.ilust');  var wrapper = ilust.find('.pag-ilust');  var pag = wrapper.find('.pag');  var btn = ilust.find('.nav-btn');    btn.click(function() {    if ($(this).hasclass('nav-next')) {      var currentpag = $('.active-pag');      var nextpag = currentpag.next();      if (!nextpag.length) {        nextpag = pag.first();      }      currentpag.stop().fadeout('fast').removeclass('active-pag');      nextpag.fadein('slow').addclass('active-pag');    } else if ($(this).hasclass('nav-prev')) {      var currentpag = $('.active-pag');      var prevpag = currentpag.prev();      if (!prevpag.length) {        prevpag = pag.last();      }      currentpag.stop().fadeout('fast').removeclass('active-pag');      prevpag.fadein('slow').addclass('active-pag');    }  });
.pag:nth-child(n+2) {    display: none;  }
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js"></script>  <div class="ilust">    <div class="nav-cat">      <a href="#" class="nav-btn nav-prev">prev</a>      <a href="#" class="nav-btn nav-next">next</a>      </div>    <div class="pag-ilust">      <div class="pag active-pag">        <p>things 0</p>        <p>lot things</p>      </div>      <div class="pag">        <p>things 1</p>        <p>lot things</p>      </div>      <div class="pag">        <p>things 2</p>        <p>lot things</p>      </div>      <div class="pag">        <p>things 3</p>        <p>lot things</p>      </div>    </div>


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