woocommerce/assets/js/frontend/woocommerce.min.js

jQuery(document).ready(function(e){e(".woocommerce textarea[placeholder], .woocommerce-page textarea[placeholder], .woocommerce input[placeholder], .woocommerce-page input[placeholder]").placeholder();e(".woocommerce-ordering").on("change","select.orderby",function(){e(this).closest("form").submit()});e("div.quantity:not(.buttons_added), td.quantity:not(.buttons_added)").addClass("buttons_added").append('<input type="button" value="+" class="plus" />').prepend('<input type="button" value="-" class="minus" />');e("input.qty:not(.product-quantity input.qty)").each(function(){var t=parseFloat(e(this).attr("min"));t&&t>0&&parseFloat(e(this).val())<t&&e(this).val(t)});e(document).on("click",".plus, .minus",function(){var t=e(this).closest(".quantity").find(".qty"),n=parseFloat(t.val()),r=parseFloat(t.attr("max")),i=parseFloat(t.attr("min")),s=t.attr("step");if(!n||n==""||n=="NaN")n=0;if(r==""||r=="NaN")r="";if(i==""||i=="NaN")i=0;if(s=="any"||s==""||s==undefined||parseFloat(s)=="NaN")s=1;e(this).is(".plus")?r&&(r==n||n>r)?t.val(r):t.val(n+parseFloat(s)):i&&(i==n||n<i)?t.val(i):n>0&&t.val(n-parseFloat(s));t.trigger("change")})});