Converts question text from Advent of Code into markup and copies it to clipboard

aoc-markdown.js

// ==UserScript==
// @name         AoC readmeifierthingy
// @namespace    http://tampermonkey.net/
// @version      0.1
// @description  Converts Advent of Code instructions into markdown format
// @author       Camas
// @match        *://adventofcode.com/*/day/*
// @exclude      *://adventofcode.com/*/day/*/input
// @grant        GM_addStyle
// @grant        GM_setClipboard
// @require      https://unpkg.com/turndown/dist/turndown.js
// ==/UserScript==

(function() {
    'use strict';

    // Add button
    var node = document.createElement("div");
    node.innerHTML = 'Copy as markdown<div></div>';
    node.setAttribute('id', 'copyButton');
    document.body.appendChild(node);

    // Add function to button
    document.getElementById ("copyButton").addEventListener ("click", CopyAsMarkdown, false);

    function CopyAsMarkdown(eventArgs){
        var elements = document.getElementsByClassName('day-desc');

        var turndownService = new TurndownService({emDelimiter: '__'});
        turndownService.addRule('remove-dashes', {
            filter: 'h2',
            replacement: function (content) {
                return '\n\n## ' + content.slice(5, -4) + '\n\n'
            }
        });
        var fullMarkdown = "";
        for(var e of elements){
            var markdown = turndownService.turndown(e);
            fullMarkdown += markdown
            fullMarkdown += '\n\n';
        }
        fullMarkdown = fullMarkdown.slice(0, -1);
        GM_setClipboard(fullMarkdown);
        document.getElementById ("copyButton").innerHTML = 'Done<div></div>'
    }

    // Style button
    GM_addStyle ( `
#copyButton {
backface-visibility: hidden;
cursor: pointer;
white-space: nowrap;
background: #3ceb55;
border-radius: 0px;
border: 0px solid #1f7d14;
border-width: 0px 0px 4px 0px;
padding: 10px 20px 10px 20px;
color: #fff;
font-size: initial;
font-family: Helvetica Neue;
font-weight: 900;
font-style: normal;
z-index: 1101;
bottom: 5px;
right: 5px;
position: fixed;
}
#copyButton > div {
color: #999;
font-size: 10px;
font-family: Helvetica Neue;
font-weight: initial;
font-style: normal;
text-align: center;
margin: 0px 0px 0px 0px
}
#copyButton > i {
font-size: 1em;
border-radius: 0px;
border: 0px solid transparent;
border-width: 0px 0px 0px 0px;
padding: 0px 0px 0px 0px;
margin: 0px 0px 0px 0px;
position: static
}
#copyButton > .ld {
font-size: initial
}
` );
})();