show detailed track-title on mixcloud.com for UserScript

mc-full-trackname.user.js

// ==UserScript==
// @name        MC full trackname
// @namespace   https://noromanba.github.com
// @description show detailed track-title on mixcloud.com for UserScript
// @include     https://www.mixcloud.com/*
// @grant       none
// @noframes
// @run-at      document-end
// @version     2017.7.30.0
// @homepage    https://gist.github.com/noromanba/173e261aae4b083eff7c2cef48b8f5dc
// @downloadURL https://gist.github.com/noromanba/173e261aae4b083eff7c2cef48b8f5dc/raw/mc-full-trackname.user.js
// @license     MIT License https://nrm.mit-license.org/2017
// @author      noromanba   https://noromanba.github.com
// @icon        https://upload.wikimedia.org/wikipedia/commons/thumb/7/75/Vinyl_record.svg/512px-Vinyl_record.svg.png
// ==/UserScript==

// Icon (PD by NikNaks)
// https://commons.wikimedia.org/wiki/File%3AVinyl_record.svg

// Devel
// https://gist.github.com/noromanba/173e261aae4b083eff7c2cef48b8f5dc


(() => {
    'use strict';

    const expand = () => {
        const track = document.querySelector([
            '.player-current-audio .current-track',
        ]);
        if (!track) return;

        track.title = track.textContent;
    };
    expand();

    // TODO DRY
    const container = document.querySelector([
        '.player-current-audio .current-track',
    ]) || document.body;

    // TBD run at attribute modified (but text node)
    new MutationObserver(records => {
        records.forEach(record => {
            expand(record.target);
        });
    }).observe(container, { childList: true, subtree: true });
})();