Userscript for NationStates trading cards – automatically inputs a default value in the ask/bid fields

cdp.user.js

// ==UserScript==
// @name         Card Default Prices
// @version      0.1
// @namespace    dithpri
// @description  Automatically inputs a default value in the ask/bid fields
// @author       dithpri
// @noframes
// @match        https://www.nationstates.net/*page=deck*/card=*
// @match        https://www.nationstates.net/*card=*/page=deck*
// @grant        none
// ==/UserScript==

(function() {
    'use strict';
    // Change values here:
    const default_prices = {
        "common":     {ask: 0.01, bid: 0.01},
        "uncommon":   {ask: 0.05, bid: 0.05},
        "rare":       {ask: 0.10, bid: 0.10},
        "ultra-rare": {ask: 0.20, bid: 0.20},
        "epic":       {ask: 0.50, bid: 0.50},
        "legendary":  {ask: 1.00, bid: 1.00}
    };

    const rarity = document.querySelector(".deckcard-season-list-card-selected > .deckcard-token").textContent.toLowerCase();

    document.querySelector("input[name=\"auction_ask\"").value = default_prices[rarity].ask.toFixed(2);
    document.querySelector("input[name=\"auction_bid\"").value = default_prices[rarity].bid.toFixed(2);

})();