Hide Gifts Variants For Themes Which Use Shopify's Ajax Api Functions

Note: If your theme using Shopify's ajax api functions for showing select variants box, you will found codes look like below:

new Shopify.OptionSelectors('product-select', { product: {{ product | json }}, onVariantSelected: selectCallback, enableHistoryState: true });

We need to edit the product's data information first before giv shopify's api showing it by those code below:

window.freegifts_product_json = function(product){ if(product){ if (!Array.isArray) { Array.isArray = function(arg) { return Object.prototype.toString.call(arg) === '[object Array]'; }; } if(!String.prototype.endsWith) { Object.defineProperty(String.prototype, 'endsWith', { value: function(searchString, position) { var subjectString = this.toString(); if (position === undefined || position > subjectString.length) { position = subjectString.length; } position -= searchString.length; var lastIndex = subjectString.indexOf(searchString, position); return lastIndex !== -1 && lastIndex === position; } }); }

    if(product.options && Array.isArray(product.options)) {

        for (var i = 0; i < product.options.length; i++) {
            if (typeof product.options[i] !== 'undefined' && typeof product.options[i].values !== 'undefined') {
                var option = product.options[i];
                if(option.values && Array.isArray(option.values))
                    for (var r = 0; r < option.values.length; r++) (option.values[r].endsWith("(Freegifts)") || option.values[r].endsWith("% off)")) && (option.values.splice(r, 1), r--)
            }
        }
    }

    var sca_price = product.price;
    var sca_price_min = product.price_max;
    var sca_price_max = product.price_min;
    var sca_compare_at_price = product.compare_at_price;
    var sca_compare_at_price_min = product.compare_at_price_max;
    var sca_compare_at_price_max = product.compare_at_price_min;

    if(product.variants && Array.isArray(product.variants)) {
        for (var id = 0; id < product.variants.length; id++) {
            var variant = product.variants[id];
            var option_name = variant.option3 ? variant.option3 : variant.option2 ? variant.option2 : variant.option1;
            if (("undefined" != typeof SECOMAPP && "undefined" != typeof SECOMAPP.gifts_list_avai && "undefined" != typeof SECOMAPP.gifts_list_avai[variant.id])
                || option_name.endsWith("(Freegifts)")
                || option_name.endsWith("% off)")) {
                product.variants.splice(id, 1);
                id = id - 1;
            } else {
                if (sca_price_min >= variant.price) {
                    sca_price_min = variant.price;
                    sca_price = variant.price;
                }
                if (sca_price_max <= variant.price) {
                    sca_price_max = variant.price;
                }
                if (variant.compare_at_price) {
                    if (sca_compare_at_price_min >= variant.compare_at_price) {
                        sca_compare_at_price_min = variant.compare_at_price;
                        sca_compare_at_price = variant.compare_at_price;
                    }
                    if (sca_compare_at_price_max <= variant.compare_at_price) {
                        sca_compare_at_price_max = variant.compare_at_price;
                    }
                }
                if (variant.available == true) {
                    product.available = true;
                }
            }
        }
    }
    product.price = sca_price;
    product.price_max = sca_price_max;
    product.price_min = sca_price_min;
    product.compare_at_price = sca_compare_at_price;
    product.compare_at_price_max = sca_compare_at_price_max;
    product.compare_at_price_min = sca_compare_at_price_min;
    if(sca_price_min < sca_price_max){
        product.price_varies = true;
    }else{
        product.price_varies = false;
    }
    if(sca_compare_at_price_min < sca_compare_at_price_max){
        product.compare_at_price_varies = true;
    }else{
        product.compare_at_price_varies = false;
    }
}
return product;
}

var sca_product_info = freegifts_product_json ( {{product | json }} ); new Shopify.OptionSelectors('product-select', { product: sca_product_info, onVariantSelected: selectCallback, enableHistoryState: true });

if(sca_product_info.variants.length===1 && sca_product_info.variants[0].title.indexOf('Default')!==-1 ){ jQuery('.single-option-selector:eq(0)').css('display','none'); }