javascript - Why are only half the element's classes able to be toggled? -

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i'm utilizing jquery's .toggleclass() function create favorite button inside several <div> elements, each has <a> element, , <i> element. i'm using 2 icons font awesome classes i'm toggling , forth between.

this works fine demonstrated jsfiddle.

the issue i'm having when dynamically generate these elements using php foreach loop half of generated element's classes toggle.

html :

<div>   <a class="h-icon" href="#">     <i class="fa fa-heart-o" aria-hidden="true"></i>   </a> </div>  <div>   <a class="h-icon" href="#">     <i class="fa fa-heart-o" aria-hidden="true"></i>   </a> </div>  <div>   <a class="h-icon" href="#">     <i class="fa fa-heart-o" aria-hidden="true"></i>   </a> </div>  <div>   <a class="h-icon" href="#">     <i class="fa fa-heart-o" aria-hidden="true"></i>   </a> </div>  <div>   <a class="h-icon" href="#">     <i class="fa fa-heart-o" aria-hidden="true"></i>   </a> </div>  <div>   <a class="h-icon" href="#">     <i class="fa fa-heart-o" aria-hidden="true"></i>   </a> </div>

jquery :

$(".h-icon").on("click", function(e) {   e.preventdefault();    $("i", this).toggleclass("fa-heart fa-heart-o");    $.ajax({     url: $(this).prop("href")   })   return false; });

php :

<?php      foreach($array $row) {          $favorite = $row['favorite'];          if($favorite == false) {              echo '<div><a class="h-icon" href="#"><i class="fa fa-heart-o" aria-hidden="true"></i></a></div>';          }         else {              echo '<div><a class="h-icon" href="#"><i class="fa fa-heart" aria-hidden="true"></i></a></div>';          }      }  ?>

when dynamically add more elements need register click listener again, or use dynamic event listener.

$(document).on("click", ".h-icon", function(e) {     // ... });

working example.


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