$( document ).ready(function() { if( typeof product_variants_removed != undefined ) { // was there items to be removed? var $addToCartForm = $('form[action="/cart/add"]'); if (window.MutationObserver && $addToCartForm.length) { if (typeof observer === 'object' && typeof observer.disconnect === 'function') { observer.disconnect(); } var config = { childList: true, subtree: true }; var observer = new MutationObserver(function() { product_variants_removed.forEach(function(item){ $('.single-option-selector option').filter(function() { return $(this).text() === item; }).remove(); }); observer.disconnect(); }); observer.observe($addToCartForm[0], config); $('.single-option-selector').trigger('change'); } } });