https://www.fysiotape.nl/wp-content/plugins/woocommerce-ajax-cart/…?ver=c1c27a6a585da2231a7c9112222cab52

1jQuery(document).ready(function($){
2    // 'use strict';
3
4    var wacUpdateTimeout = null;
5
6    wacChange = function(qtyInput) {
7
8
9        // ask user if they really want to remove this product
10        if ( ( wooajaxcart.confirm_zero_qty == 'yes' ) && !wacZeroQuantityCheck(qtyInput) ) {
11            return false;
12        }
13
14        // when qty is set to zero, then fires default woocommerce remove link
15        if ( qtyInput.val() == 0 ) {
16            var removeLink = qtyInput.closest('.cart_item').find('.product-remove a');
17            removeLink.trigger('click');
18            return false;
19        }
20
21        // clear previous timeout, if exists
22        if ( wacUpdateTimeout !== null ) {
23            clearTimeout(wacUpdateTimeout);
24        }
25
26        wacUpdateTimeout = setTimeout(function(){
27            wacRefreshCart(qtyInput);
28        }, wooajaxcart.ajax_timeout);
29
30        return true;
31    };
32
33    wacRefreshCart = function(qtyInput) {
34
35        // some themes creates multiple cart forms so it will try to find the correct update button
36        if ( qtyInput.closest('.woocommerce-cart-form').length ) {
37            var mainSelector = qtyInput.closest('.woocommerce-cart-form');
38        }
39        else {
40            var mainSelector = $(document);
41        }
42        
43        // deal with update cart button
44        var updateButton = mainSelector.find("button[name='update_cart']:not(.dgfw-add-gift-button),input[name='update_cart']:not(.dgfw-add-gift-button)");
45
46        updateButton.removeAttr('disabled')
47                    .trigger('click')
48                    .val( wooajaxcart.updating_text )
49                    .prop('disabled', true);
50        
51        // change the Update cart button
52        $("a.checkout-button.wc-forward").addClass('disabled')
53                                         .html( wooajaxcart.updating_text );
54    };
55
56    // overrided by wac-js-calls.php
57    var wacZeroQuantityCheck = function(qtyInput) {
58        // when changes quantity to zero
59        if ( parseInt(qtyInput.val()) == 0 && !confirm(wooajaxcart.warn_remove_text) ) {
60            var newQty = wacResetNewQty(qtyInput);
61            qtyInput.val( newQty);
62
63            return false;
64        }
65
66        // when empty the quantity input
67        if ( qtyInput.val().length === 0 && !confirm(wooajaxcart.warn_remove_text) ) {
68            var newQty = wacResetNewQty(qtyInput);
69            qtyInput.val( newQty ).trigger('change');
70
71            return false;
72        }
73
74        return true;
75    };
76
77    var wacResetNewQty = function(qtyInput) {
78        var min = qtyInput.attr('min');
79
80        if ( min != 'undefined' ) {
81            var newQty = ( ( min > 0 ) ? min : 1 );
82        }
83        else {
84            var newQty = 1;
85        };
86
87        return newQty;
88    };
89
90    var wacListenQtyChange = function() {
91        $(document).on('change', '.qty', function(e){
92            // prevent troubles with WooCommerce Product Bundles plugin
93            if ( $('.bundle_add_to_cart_button').length ) {
94                return true;
95            }
96
97            // prevent to set invalid quantity on select
98            if ( $(this).is('select') && ( $(this).attr('max') > 0 ) &&
99                 ( parseInt($(this).val()) > parseInt($(this).attr('max')) ) ) {
100                $(this).val( $(this).attr('max') );
101
102                e.preventDefault();
103                return false;
104            }
105
106            return wacChange( $(this) );
107        });
108    };
109
110    var wacFindInputQty = function(btn) {
111        var inputQty = btn.parent().parent().parent().find('.qty');
112
113        if ( !inputQty.length ) {
114            inputQty = btn.closest('.cart').find('.qty');
115        }
116
117        if ( !inputQty.length ) {
118            inputQty = btn.closest('.product-quantity').find('.qty');
119        }
120
121        return inputQty;
122    };
123
124    wacListenQtyButtons = function() {
125        var fnIncrement = function(e){
126            if ( $(this).hasClass('disabled') ) {
127                e.preventDefault();
128                return false;
129            }
130
131            var inputQty = wacFindInputQty( $(this) );
132
133            if ( inputQty.attr('max') != 'undefined' && parseFloat(inputQty.val()) >= parseFloat(inputQty.attr('max')) ) {
134                return false;

135            }
136
137            inputQty.val( function(i, oldval) { return ++oldval; });
138            inputQty.trigger('change');
139
140            return false;
141        };
142
143        var fnDecrement = function(e){
144            if ( $(this).hasClass('disabled') ) {
145                e.preventDefault();
146                return false;
147            }
148
149            var inputQty = wacFindInputQty( $(this) );
150            var oldVal = inputQty.val();
151
152            if ( inputQty.attr('min') != 'undefined' && parseInt(inputQty.attr('min')) >= oldVal ) {
153                return false;
154            }
155
156            inputQty.val( --oldVal );
157            inputQty.trigger('change');
158
159            return false;
160        };
161
162        if ( $('.wac-btn-inc').length ) {
163            // fix common style problem in single product page
164            if ( !$('#wac-style-prod-qty').length ) {
165                $("<style type='text/css' id='wac-style-prod-qty'>.product .quantity { display: inline; float: none !important; margin-right: 0 !important; }</style>").appendTo('head');
166            }
167 
168            $('.wac-btn-inc').off('click.wac2910').on('click.wac2910', fnIncrement);
169            $('.wac-btn-sub').off('click.wac2911').on('click.wac2911', fnDecrement);
170
171            if ( $('.grid').length ) {
172                setTimeout(wacListenQtyButtons, 500);
173            }
174        }
175
176        $(document).off('click.wac3000').on('click.wac3000', '.wac-btn-inc', fnIncrement);
177        $(document).off('click.wac3001').on('click.wac3001', '.wac-btn-sub', fnDecrement);
178    };
179
180    // onload calls
181    wacListenQtyChange();
182    wacListenQtyButtons();
183
184    $(document.body).on('wc_fragments_refreshed', function(){
185        wacListenQtyButtons();
186    });
187
188    $( document.body ).on( 'added_to_cart', function( event, fragments, cart_hash ) {
189        // prevent woocommerce to reload the page after Add to cart in certain conditions (outside Cart page)
190        // the window.location.reload() was defined in woo cart.js script
191		if ( $( '.woocommerce-cart-form' ).length == 0 ) {
192            $('body').append('<div class="woocommerce-cart-form" style="display: none;"></div>');
193		}
194    });
195});