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Graham O Connor
6,551 Pointsi just want to know where is the mistake in this code
<!DOCTYPE html> <html> <head> <title>Treetunes</title> <link rel="stylesheet" href="style2.css"/> </head>
<body>
<div>
<h1>Treetunes</h1>
<ol id="playlist">
</ol>
<button id="play">Play</button>
<button id="next">Next</button>
<button id="stop">Stop</button>
</div>
<script src = "playlist1.js" ></script>
<script src = "media.js"></script>
<script src = "movie.js"></script>
<script src ="song.js"></script>
<script src ="app1.js"></script>
</body>
</html>
function Playlist() { this.songs = []; this.nowPlayingIndex = 0
}
Playlist.prototype.add = function(song) { this.songs.push(song); };
Playlist.prototype.play = function() { var currentSong = this.songs[this.nowPlayingIndex]; currentSong.play();
};
Playlist.prototype.stop = function(){ var currentSong = this.songs[this.nowPlayingIndex]; currentSong.stop();
};
Playlist.prototype.next = function() { this.stop(); this.nowPlayingIndex++; if(this.nowPlayingIndex === this.songs.length){ this.nowPlayngindex = 0; }
this.play();
};
Playlist.prototype.renderInElement = function(list) { list.innerHTML = "";
for(var i = 0; i<this.songs.length; i++){
list.innerHTML += this.songs[i].toHTML();
}
};
function Media(title, duration ) { this.title = title; this.duration = duration; this.isPlaying = false; }
Media.prototype.play = function() {
this.isPlaying = true;
};
Media.prototype.stop = function() {
this.isPlaying = false;
};
function Song(title, artist ,duration ) { Mecia.call(this, title, duration); this.artist = artist;
}
Song.prototype = Object.create(Media.prototype);
Song.prototype.toHTML = function() { var htmlString = '<li'; if(this.isPlaying){
htmlString +='class="current"';
}
htmlString +='>'; htmlstring +=this.title; htmlString += '-'; htmlString +=this.artist; htnlString +='<span class="duration">'; htmlString += this.duration; htmlString += '</span></li>';
};
var hereComesTheSun = new Song("Here comes the sun", "The Beatles", "2:54"); var walkingOnSunshine = new Song("Walking on sunshine","Katrina and the Waves","3:43");
var manOfSteel = new Movie("Man of Steel", 2013, "2:30:00");
playlist.add(hereComesTheSun); playlist.add(walkingOnSunShine);
playlist.add(manOfSteel);
var playListElement = document.getElementById("playlist");
playlist.renderInElement(playListElement);
var playButton = document.getElementById("play"); playButton.onclick = function(){
playlist.play();
playlist.renderInElement(playListElement);
} var nextButton = document.getElementById("next"); nextButton.onclick = function(){
playlist.next();
playlist.renderInElement(playListElement);
} var stopButton = document.getElementById("stop"); stopButton.onclick = function(){
playlist.stop();
playlist.renderInElement(playListElement);
}
function Movie(title, artist ,duration ) { Mecia.call(this, title, duration); this.artist = artist;
}
Movie.prototype = Object.create(Media.prototype);
Movie.prototype.toHTML = function() { var htmlString = '<li'; if(this.isPlaying){
htmlString +='class="current"';
}
htmlString +='>'; htmlstring +=this.title; htmlString += ' ('; htmlString +=this.year; htmlString += ') '; htnlString +='<span class="duration">'; htmlString += this.duration; htmlString += '</span></li>';
};
1 Answer
Simon Coates
28,694 PointshtnlString ? I don't know if that's the only error. People will be more inclined to debug if you post a workspace snapshot (see https://teamtreehouse.com/library/previews-and-snapshots ) or use the markdown syntax so code displays properly. Another spelling mistake is nowPlayngindex.
It may also punish you for walkingOnSunShine as opposed to walkingOnSunshine. I think case may matter in javascript.
you also seem to have a reference to Mecia not Media.
with the movie,
this.artist = artist;
should probably be
this.year = year;
You also need to change the movie function definition so that the method expects year.