Allmusic.com Follow Artist Accessibility Fix (Tampermonkey Userscript)

allmusic-tamper-follow-fix.js

// ==UserScript==
// @name         Make Allmusic Accessible: Follow Artist
// @namespace    http://tampermonkey.net/
// @version      1.0
// @description  Makes the clickable div button to follow an artist accessible to screenreaders
// @author       Dan Dulaney
// @match        https://www.allmusic.com/artist/*
// @grant        none
// ==/UserScript==

(function() {
    'use strict';

    var followbutton = document.getElementsByClassName("artist-follow")[0];

    followbutton.setAttribute("role", "button");
    followbutton.setAttribute("tabindex",0);
    followbutton.setAttribute("aria-label", "Follow Button");
    
    doesfollowexist();
    followbutton.addEventListener("click", doesfollowexist, false);
})();

function doesfollowexist() {
    var followbutton = document.getElementsByClassName("artist-follow")[0];
    var activefollow = document.getElementsByClassName('artist-follow following');

    if (activefollow.length > 0) {
        followbutton.setAttribute("aria-pressed","true");
    } else {
        followbutton.setAttribute("aria-pressed","false");
    }
}