2.product_page.js

// Product Page
function getCookie(name) {
    var v = document.cookie.match('(^|;) ?' + name + '=([^;]*)(;|$)');
    return v ? v[2] : null;
}

var cookieValue = getCookie("send_to_parilti");

if(cookieValue == 1) {
    document.getElementsByName("add-to-cart")[0].innerText = "Parıltı'ya Gönder"; // Means "Send to Parıltı"
}