mangadex forums fuck up your text

fuckItUp.js

// ==UserScript==
// @name         Rainbowfy
// @namespace    http://tampermonkey.net/
// @version      0.1
// @description  try to take over the world!
// @author       You
// @match        https://mangadex.org/forum
// @match        https://mangadex.org/forums
// @match        https://mangadex.org/forum/*
// @match        https://mangadex.org/forums/*
// @match        https://mangadex.org/thread/*
// @match        https://mangadex.org/manga/*/*/com*
// @match        https://mangadex.org/chapter/*/com*
// @grant        none
// ==/UserScript==

(function() {
    'use strict';
    const fuckUp = tx => Array.from(
        tx,
        (s,i)=>!s.trim()?s
        :`[color=hsla(${
        Math.ceil(360*i/Math.min(tx.length,360))
        },${
        Math.ceil(100*i/tx.length)
        }%,${
        Math.ceil(90*i/tx.length)
        }%,${
        Math.round(100*i/tx.length)/100
        })]${
        s
        }[/color]`
    ).join('');
    let qs = document.querySelectorAll('#post_reply_button,#start_thread_button,.edit_post_button');
    let okay = Array.from(qs, e => e.parentElement.appendChild(document.createElement('button')));
    let okey = Array.from(qs, e => e.parentElement.appendChild(document.createElement('button')));
    console.log({okay,okey});
    okay.forEach(k => {
        k.innerHTML = 'Fuck it ↑.';
        k.addEventListener('click', e => {
            e.preventDefault();
            let tx = k.form.querySelector('#text');
            console.log(tx.value);
            tx.value = fuckUp(tx.value);
            console.log(tx.value);
        });
    });
    const fuckUpMore = tx => Array.from(
        tx,
        (s,i)=>!s.trim()?s
        :`[color=hsla(${
        Math.ceil(360*Math.random())
        },${
        Math.ceil(100*Math.random())
        }%,${
        Math.ceil(100*Math.random())
        }%,${
        Math.round(100*Math.random())/100
        })]${
        s
        }[/color]`
    ).join('');
    okey.forEach(k => {
        k.innerHTML = 'Fuck it ↑ BADLY.';
        k.addEventListener('click', e => {
            e.preventDefault();
            let tx = k.form.querySelector('#text');
            console.log(tx.value);
            tx.value = fuckUpMore(tx.value);
            console.log(tx.value);
        });
    });
})();