Userscript: Fallen London - Discard All

fallenlondon_discardall.user.js

// ==UserScript==
// @name         Fallen London - Discard All
// @namespace    http://shadenexus.com
// @version      1.2
// @description  Discard all discardable cards
// @author       Gwyndolyn Marchant
// @match        https://www.fallenlondon.com/
// @icon         https://www.google.com/s2/favicons?domain=fallenlondon.com
// @grant        none
// ==/UserScript==

function sleep(ms) {
    return new Promise(resolve => setTimeout(resolve, ms));
}

(async function() {
    'use strict';

    const selector = ".card__discard-button:not(.button--disabled)";
    
    let e = document.createElement("button");
    e.innerHTML = "Discard<br/>All ♻";
    e.id = "discard-all-button";
    e.className = "button button--primary button--small";
    e.style.position = "absolute";
    e.style.zIndex = "10";
    e.style.height = "auto";
    e.style.left = "0px";
    e.style.top = "5px";
    e.addEventListener("click", async () => {
        let disc = document.querySelector(selector);
        while (disc != null) {
            disc.click();
            await sleep(10);
            disc = document.querySelector(selector);
        }
    });

    let cards = null;
    setInterval(function(){
        if (document.getElementById("discard-all-button") == null) {
            cards = document.querySelector("div.cards");
            cards.prepend(e);
        }
    }, 5000);
})();