fanatical-redeem-link.user.js

// ==UserScript==
// @name         Fanatical Redeem Steam Link
// @namespace    http://rezzell.com
// @version      0.1
// @description  Show Redeem link on Fanatical simlar to Humble Bundle
// @author       Russell Parks
// @match        https://www.fanatical.com/en/orders/*
// @grant        none
// @require      http://ajax.googleapis.com/ajax/libs/jquery/1/jquery.min.js
// ==/UserScript==

function addRedeemLink(elem, key){
    newElem = $('<div class="input-group-btn"><button type="button" class="btn btn-primary" onclick=>Redeem</button></div>');
    newElem.appendTo(elem);
    newElem.click(function(){
        window.open('https://store.steampowered.com/account/registerkey?key='+key,'_blank');
    });
}

function addLinks(){
    $('dd > div > div > div.input-group > input.form-control[value]').parent().not($('button:contains("Redeem")').parent().parent()).find('input.form-control[value]').each(function(){
        addRedeemLink(this.parentNode, this.value);
    });
}

$(document).ready(function() {
    addLinks();
    setInterval(addLinks, 2000);
});