index.html

Drag this to your bookmark bar: <a href='javascript: (function () {
  var pid;
  var p_url;
  var S = require("models/sound");
  var playlists = require("models/playlist").instances._store;

  for (p in playlists) {
    p_url = playlists[p].attributes.permalink_url.split("/")[5];
    if (p_url == window.location.pathname.split("/")[3]) {
      pid = p;
    }
  }

  var playlist = require("models/playlist").instances.get(pid);

  var track_ids = prompt("GIMME TR4CK 1Ds NOA.\nComma delimited, thanks").replace(" ", "").split(",");

  while (playlist.soundsCollection.length) {
    playlist.removeSound(playlist.soundsCollection.at(0));
  }

  playlist.set({title: "H4CKED S3T!!1!" });

  var defs  = track_ids.map(function (t_id) {
    var s = new S({id: t_id});
    return s.fetch().done(function () {
      playlist.addSound(s);
      s.release();
    });
  });

  $.whenAll(defs).done(function () {
    Array.prototype.forEach.call(document.querySelectorAll(".trackList__newListItem"), function(el) {
      el.classList.remove("trackList__newListItem")
    });
  });

}());'>MAKE ME A SET</a>, and then click it while looking at any set on SoundCloud