Userscript to solve liveworksheets.com exercises

liveworksheets.user.js

// ==UserScript==
// @name         Liveworksheets.com solver
// @namespace    https://mvolfik.github.io/
// @version      0.2
// @description  Add button to autofill liveworksheets.com
// @author       Matěj Volf
// @match        https://www.liveworksheets.com/*
// @downloadUrl  https://gist.github.com/mvolfik/5d663fd304c38a872813e0576a58573a/raw/liveworksheets.user.js
// @updateUrl    https://gist.github.com/mvolfik/5d663fd304c38a872813e0576a58573a/raw/liveworksheets.user.js
// @grant        none
// ==/UserScript==

(function() {
    'use strict';

    const but = document.createElement("button");
    but.style.position = "absolute";
    but.style.top = "0";
    but.style.left = "0";
    but.style["z-index"] = "999";
    but.innerText = "Fill correct values";

    function fillItem(i, value) {
        const is = i.toString();
        const textbox = document.getElementById("textbox" + is);
        if (textbox !== null) {
            textbox.innerText = value;
            return true
        }

        const select = document.getElementById("selectablediv" + is);
        if (select !== null) {
            if (select.classList.contains("selectedselectablediv") !== (value === "select:yes")) {
                console.log(`selectanswer({is})`);
                window.selectanswer(i);
            }
            return true
        }
    }
    function clickHandler() {
        but.remove();

        const data = JSON.parse(window.contenidojson);
        const failed = [];
        data.forEach(function(values, i){
            const is = i.toString();
            try {
                if (fillItem(i, values[0])) {
                    return
                }
            } catch (e) {}
            failed.push(is);
        });
        const sub = document.getElementById("capafinish");
        sub.scrollIntoView({block: "center"});
        if (failed.length > 0) {
            alert("Failed to autofill these items: " + failed.join(", "));
        }

    }
    but.addEventListener("click", clickHandler);
    document.getElementById("capa1").insertAdjacentElement("afterbegin", but);
})();

pls fix for new versio

Hey, I don't have any use for this anymore, so I probably won't spend my time to update this. Nonetheless, you are more that welcome to adapt the code and publish your own, updated version.