Monkeyscript to scroll to the end of the likes, because soundclound doesn't allow random sort of the whole collection

soundcloudsEndScroll.user.js

// ==UserScript==
// @name        Soundcloud scroll
// @namespace   http://userscripts.org/users/399688
// @description Scroll to the end of the likes, because soundclound doesn't allow random sort of the whole collection
// @include     https://soundcloud.com/*
// @version     1
// @grant       none
// ==/UserScript==

/**
Script for soundclound that still hasn't implemented randomized playing of favorite tracks.

This will just continuously scroll to the end of the page when the button is hit and stop when hit again.

Yeah, the CSS sucks giant, monsterballs and it works like shit. So fucking what. It kinda, sorta works.

Made in Firefox's Ardoise.
**/

var body = document.getElementsByTagName('body') [0];

// Was a div before. It's now a button to trigger the functionality
var div = document.createElement('button');
var interval = null;
div.id = 'autoscroller'
div.innerHTML = 'Start scrolling'
div.style = 'z-index: 9999; position: fixed; height: 45px; width: 110px; right: 0px; top: 0px; text-align: center;'

function activateDiv(){
  interval = setInterval(()=> {
    // Will work until they rename the class
    document.getElementsByClassName('l-footer')[0].scrollIntoView()
  }, 500);
  div.innerHTML = "Stop scrolling"
}

function deactivateDiv(){
  clearInterval(interval);
  interval = null;
  div.innerHTML = "Start scrolling"
}

div.addEventListener('click', (e)=> {
  interval ? deactivateDiv() : activateDiv();
})

// Wait for the correct URL - add or remove
setInterval( ()=> {
  var onLikesPage = window.location.href.startsWith("https://soundcloud.com/you/likes")
  if(onLikesPage && !document.getElementById(div.id)) {
      body.appendChild(div)
  } else if(!onLikesPage && document.getElementById(div.id)){
      deactivateDiv()
      body.removeChild(div)
  }
}, 500)