javascript - php jquery ajax jquery >than not working as it should -


i have form validated through below code:

function add_to_cart(){ jquery('#modal_errors').html(""); var quantity = jquery('#quantity').val(); var available=jquery('#available').val(); var error=''; var data = jquery('#add_product_form').serialize(); if(quantity==''||quantity==0){     error+='<p class="text-danger text-center">you must enter quantity greater 0!!! set order 0 kindly visit cart!!!</p>';     jquery('#modal_errors').html(error);     return; }else if(!(quantity < available)){     error += '<p class="text-danger text-center">there '+available+' available, kindly enter number equal or smeller availability!!!</p>';     jquery('#modal_errors').html(error);     return; }else{     jquery.ajax({         url : '/aresv2/admin/parsers/add_cart.php',         method : 'post',         data: data,         success: function(){             location.reload();             },         error: function(){alert("something went wrong in cart parser!!");}         }); }}

the else if statement

((!(quantity < available))) note tried make (quantity > available) no avail

is not working should not accepting numbers pass though within accepted range.

example quantity 2 , available 12. quantity 3 seen wrong (which should not seen wrong), 1 seen right (which correct) , 13 wrong (which correct)

the below jquery function getting data:

<form action="add_cart.php" method="post" data-toggle="validator" id="add_product_form">                         <input type="hidden" name="product_id" value="<?= $id ;?>">                              <?php if (isset($_session['sbuser'])){ ?>                             <div class="form-group">                             <div class="col-xs-3">                                     <label for="quantity">quantity:</label>                                     <input type="number" class="form-control" name="quantity" id="quantity" min="1">                               </div><div class="col-xs-9"></div>                                 <p>available: <?= $prodqty['prodqty'] ;?></p>                                 <!-- <p>available: <?= $prodtype ;?></p> -->                             </div><br /><br />                              <?php }else{                                 echo'<b>kindly, login clicking <a href="login.php"><u>here</u></a> able add items shopping cart!!';                              } ;?>                               <input type="hidden" name="available" id="available" value="<?= $prodqty['prodqty'] ;?>">                         </form>

can please help.

try out should work you. jquery's .val() method returns string i.e "5" misbehaves when compare numbers. 

function add_to_cart(){     jquery('#modal_errors').html("");     var quantity = +jquery('#quantity').val(); //added + convert number     var available= +jquery('#available').val();     var error='';     var data = jquery('#add_product_form').serialize();     if(quantity===0){         error+='<p class="text-danger text-center">you must enter quantity greater 0!!! set order 0 kindly visit cart!!!</p>';         jquery('#modal_errors').html(error);         return;     }else if(quantity > available){         error += '<p class="text-danger text-center">there '+available+' available, kindly enter number equal or smeller availability!!!</p>';         jquery('#modal_errors').html(error);         return;     }else{         jquery.ajax({             url : '/aresv2/admin/parsers/add_cart.php',             method : 'post',             data: data,             success: function(){                 location.reload();                 },             error: function(){alert("something went wrong in cart parser!!");}             });     }}

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