How to individually increase or decrease a value using jquery

Question

I am looking to increase or decrease each products by clicking + or - button individually, but the issues is when I click any + button.. all products value is increased instead of one, same when i click - button. Kindly help me out how to do this

jquery

 $(document).ready( function(){
    $(".quantity-adder .add-action").click( function(){
        if( $(this).hasClass('add-up') ) {  
            $("[name=quantity]",'.quantity-adder').val( parseInt($("[name=quantity]",'.quantity-adder').val()) + 1 );
        }else {
            if( parseInt($("[name=quantity]",'.quantity-adder').val())  > 1 ) {
                $("input",'.quantity-adder').val( parseInt($("[name=quantity]",'.quantity-adder').val()) - 1 );
            }
        }
    } );

});

HTML

 <div class="product-extra">
    <p>Product 1</p>
                            <div class="quantity-adder pull-left">
                                <div class="quantity-number pull-left">
                                    <span>Qutantity</span>
                                    <input type="text" name="quantity" size="2" value="1" />
                                </div>
                                <div class="quantity-wrapper pull-left">
                                    <span class="add-up add-action fa fa-plus"></span> 
                                    <span class="add-down add-action fa fa-minus"></span>
                                </div>                  
                                <input type="hidden" name="product_id" size="2" value="40" />   
                            </div>                                          

                    </div>
            <br /> 
                             <br /> 
                                   <br /> 

                       <div class="product-extra">
    <p>Product 2</p>
                            <div class="quantity-adder pull-left">
                                <div class="quantity-number pull-left">
                                    <span>Qutantity</span>
                                    <input type="text" name="quantity" size="2" value="1" />
                                </div>
                                <div class="quantity-wrapper pull-left">
                                    <span class="add-up add-action fa fa-plus"></span> 
                                    <span class="add-down add-action fa fa-minus"></span>
                                </div>                  
                                <input type="hidden" name="product_id" size="2" value="44" />   
                            </div>                                          

                    </div>
                       <br /> 
                             <br /> 
                                   <br /> 
                                   <div class="product-extra">
    <p>Product 3</p>
                            <div class="quantity-adder pull-left">
                                <div class="quantity-number pull-left">
                                    <span>Qutantity</span>
                                    <input type="text" name="quantity" size="2" value="1" />
                                </div>
                                <div class="quantity-wrapper pull-left">
                                    <span class="add-up add-action fa fa-plus"></span> 
                                    <span class="add-down add-action fa fa-minus"></span>
                                </div>                  
                                <input type="hidden" name="product_id" size="2" value="48" />   
                            </div>                                          

                    </div>
            <br /> 
                             <br /> 
                                   <br /> 

                       <div class="product-extra">
    <p>Product 4</p>
                            <div class="quantity-adder pull-left">
                                <div class="quantity-number pull-left">
                                    <span>Qutantity</span>
                                    <input type="text" name="quantity" size="2" value="1" />
                                </div>
                                <div class="quantity-wrapper pull-left">
                                    <span class="add-up add-action fa fa-plus"></span> 
                                    <span class="add-down add-action fa fa-minus"></span>
                                </div>                  
                                <input type="hidden" name="product_id" size="2" value="55" />   
                            </div>                                          

                    </div>
                       <br /> 
                             <br /> 
                                   <br /> 

demo link https://jsfiddle.net/sjyq64mj/

Answer 1

DEMO

 $(document).ready(function () {
     $(".quantity-adder .add-action").click(function () {
         if ($(this).hasClass('add-up')) {
             var text = $(this).parent().parent().parent().find("[name=quantity]", '.quantity-adder')


             text.val(parseInt(text.val()) + 1);
         } else {
             var text = $(this).parent().parent().parent().find("[name=quantity]", '.quantity-adder')
             if (parseInt(text.val()) > 1) {


                text.val(parseInt(text.val()) - 1);
             }
         }
     });

 });

I added the .parent() so that then find the proper text to increase

Answer 2

You need to select the correct control and increase/decrease the value. This can easily be done by using closest to go to the common parent div and then using find to select the correct control.

 $(document).ready(function () {
     $(".quantity-adder .add-action").click(function () {
         var ctrl = $(this).closest('.quantity-adder').find("[name=quantity]", '.quantity-adder');
         if ($(this).hasClass('add-up')) {
             $(ctrl).val(parseInt($(ctrl).val()) + 1);
         } else {
             if (parseInt($(ctrl).val()) > 1) {
                 $(ctrl).val(parseInt($(ctrl).val()) - 1);
             }
         }
     });

 });

jsFiddle

Alternatively you can use <input type='number' min='1' value='1' /> for modern browsers (no need of any javascript)

Answer 3

Working fiddle link : https://jsfiddle.net/sjyq64mj/5/

 $(document).ready( function(){
    $(".quantity-adder .add-action").click( function(){
        var qtyField = $(this).closest('.quantity-adder').find("[name=quantity]");

        if( $(this).hasClass('add-up') ) {  
            qtyField.val( parseInt(qtyField.val()) + 1 );
        }else {
            if( parseInt(qtyField.val())  > 1 ) {
                qtyField.val( parseInt(qtyField.val()) - 1 );
            }
        }
    } );

    });

Answer 4

Try with closest() :

 //quantity text - box finder var qty = function(el) { return $(el).closest('div.quantity-adder').find('input[type=text][name=quantity]').eq(0); }; var plus = function(e) { var q = qty(this); q.val(1 + (+q.val() || 0)); }; var minus = function(e) { var q = qty(this); var v = (+q.val() || 0) - 1; if (1 > v) v = 1; q.val(v); }; $(function() { $('span.fa-plus').on('click', plus); $('span.fa-minus').on('click', minus); });

 .pull-left { float: left; } span.fa-plus:after { content: "+"; } span.fa-minus:after { content: "-"; } span.add-action { cursor: pointer; }

 <script src="https://ajax.googleapis.com/ajax/libs/jquery/1.9.1/jquery.min.js"></script> <div class="product-extra"> <p>Product 1</p> <div class="quantity-adder pull-left"> <div class="quantity-number pull-left"> <span>Qutantity</span> <input type="text" name="quantity" size="2" value="1" /> </div> <div class="quantity-wrapper pull-left"> <span class="add-up add-action fa fa-plus"></span> <span class="add-down add-action fa fa-minus"></span> </div> <input type="hidden" name="product_id" size="2" value="40" /> </div> </div> <br /> <div class="product-extra"> <p>Product 2</p> <div class="quantity-adder pull-left"> <div class="quantity-number pull-left"> <span>Qutantity</span> <input type="text" name="quantity" size="2" value="1" /> </div> <div class="quantity-wrapper pull-left"> <span class="add-up add-action fa fa-plus"></span> <span class="add-down add-action fa fa-minus"></span> </div> <input type="hidden" name="product_id" size="2" value="44" /> </div> </div> <br /> <div class="product-extra"> <p>Product 3</p> <div class="quantity-adder pull-left"> <div class="quantity-number pull-left"> <span>Qutantity</span> <input type="text" name="quantity" size="2" value="1" /> </div> <div class="quantity-wrapper pull-left"> <span class="add-up add-action fa fa-plus"></span> <span class="add-down add-action fa fa-minus"></span> </div> <input type="hidden" name="product_id" size="2" value="48" /> </div> </div> <br /> <div class="product-extra"> <p>Product 4</p> <div class="quantity-adder pull-left"> <div class="quantity-number pull-left"> <span>Qutantity</span> <input type="text" name="quantity" size="2" value="1" /> </div> <div class="quantity-wrapper pull-left"> <span class="add-up add-action fa fa-plus"></span> <span class="add-down add-action fa fa-minus"></span> </div> <input type="hidden" name="product_id" size="2" value="55" /> </div> </div>