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JavaScript JavaScript Loops, Arrays and Objects Tracking Multiple Items with Arrays Adding Data to Arrays

James Barrett
James Barrett
13,253 Points
Posted by James Barrett
James Barrett
13,253 Points

List items not showing, no idea why!

Code:

HTML: 

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <title>Musical Playlist</title>
  <link rel="stylesheet" href="css/styles.css">
</head>
<body>
<h1>My Music Playlist</h1>
<div id="listDiv">

</div>
<script src="js/helpers.js"></script>
<script src="js/playlist.js"></script>
</body>
</html>

JS helpers:

function printList( list ) {
  var listHTML = '<ol>';
  for (var i = 0; i < list.length; i += 1) {
    listHTML += '<li>' + list[i] + '</li>';
  }
  listHTML += '</ol>';
  print(listHTML);
}

function print(html) {
  document.write(html);
}

JS playlist

var playList = [];
playList.push('I did it my way');
playList.push('Respect', 'Imagine');
playList.unshift('Born to Run');
playList.unshift('James, 'Barrett');

printList(playList);

All that shows is the heading: My music playlist... I have followed the code exactly... No idea why it is not showing, any suggestions?

Thanks, James.

2 Answers

Manolis Kyriakakis
Manolis Kyriakakis
7,534 Points

It's a minor mistake on playlist.js file. Just put the missing quote after the "James" on playList.unshift('James, 'Barrett'); and then it will work. You can always use the javascript console (ctrl+shift+j) to find possible errors of your javascript code.

James Barrett
James Barrett
13,253 Points
James Barrett
James Barrett
13,253 Points

Ah yes there is that bugger of an error haha, thanks!

Jonathan Grieve
MOD
Jonathan Grieve
Treehouse Moderator 91,253 Points
Jonathan Grieve
Jonathan Grieve
Treehouse Moderator 91,253 Points

Try changing i +=1 to i++ in your for loop declaration.

There's something the JS syntax highlighting doesn't like in the code.

 for (var i = 0; i < list.length; i++;) {