Set title for Yandex.Music tab

yamusic-title.js

var loadScript = function() { 
	window._player = false;
	var updateTitle = function(songTitle, songArtists) {
		document.title = songTitle + ' — ' + songArtists;
	}
	
	for (var i in Mu.blocks.binding) {
		if (Mu.blocks.binding[i].type == 'volume') {
			window._player = Mu.blocks.binding[i].block.player;
			break;
		}
	}
	
	var songInfo =  window._player.getTrackData();
	var allSongArtists = function(artistsList) {
		var artists = [];
		for (artist in artistsList) {
			artists.push(artistsList[artist].name);
		}
		return artists.join(', ');
	}
	if (songInfo) {
		updateTitle(songInfo.metadata.title, allSongArtists(songInfo.metadata.artists));
	}
	
	window._player.on('trackdata', function(event) {
		var currentSongInfo = event.currentTrackData;
		updateTitle(currentSongInfo.metadata.title, allSongArtists(currentSongInfo.metadata.artists));
	});	
};

var injectScript = function(script) {
	var actualCode = 'try {(' + script + ')(); } catch(e) {console.log("injected error", e);};';
  var script = document.createElement('script');
	script.textContent = actualCode;
	(document.head || document.documentElement).appendChild(script);
	script.parentNode.removeChild(script);
}

injectScript(loadScript);