remove exit.sc redirector from links on SoundCloud for UserScript

exit-exit-sc.user.js

// ==UserScript==
// @name        exit exit.sc
// @namespace   http://noromanba.flavors.me
// @description remove exit.sc redirector from links on SoundCloud for UserScript
// @include     https://soundcloud.com/*
// @grant       none
// @noframes
// @run-at      document-end
// @version     2016.6.8.1
// @homepage    https://gist.github.com/noromanba/6b83ef63fe8b794364267bd832fdbc71
// @downloadURL https://gist.github.com/noromanba/6b83ef63fe8b794364267bd832fdbc71/raw/exit-exit-sc.user.js
// @contributor noromanba   https://gist.github.com/noromanba/76a3d7791cf6eaf1c94c (Fork of)
// @license     MIT License https://nrm.mit-license.org/2016
// @author      noromanba   http://noromanba.flavors.me
// @icon        https://upload.wikimedia.org/wikipedia/commons/thumb/d/d5/New_Zealand_TW-12.svg/128px-New_Zealand_TW-12.svg.png
// ==/UserScript==

// Icon (PD by By New Zealand Transport Agency)
// https://commons.wikimedia.org/wiki/File%3ANew_Zealand_TW-12.svg
// http://www.nzta.govt.nz/resources/traffic-control-devices-manual/sign-specifications/

// Devel
// https://gist.github.com/noromanba/6b83ef63fe8b794364267bd832fdbc71


// e.g.
// https://soundcloud.com/coruscant
(() => {
    'use strict';

    const detox = (ctx) => {
        if (!ctx.querySelectorAll) return;

        Array.from(ctx.querySelectorAll([
            'a[href^="https://exit.sc?url="]'
        ]), link => {
            // redirector syntax;
            // https://exit.sc?url=<ENCODED_URL>
            const url = (new URL(link.href).search.match(/(?:\?|&)url=([^&]+)/) || [])[1];
            if (!url) return;

            link.href = decodeURIComponent(url);
        });
    };
    detox(document.body);

    new MutationObserver(records => {
        records.forEach(record => {
            detox(record.target);
        });
    }).observe(document.body, { childList: true, subtree: true });
})();