Dart-polymer strange errors

Question

I am trying to create simple polymer dart application but dart editor gives me some strange errors like:

Unexpected end tag (head). Ignored.

definition for Polymer element with tag name "login-window" not found.

Here is the simplified version of that app: git repo

What's wrong with it?

Answer 1

In this line of index.html, you have misspelled link. As a result the parser is still looking for a closing </ling> tag. When it doesn't find one, it ignores the closing </head> to prevent improper nesting of tags.

<ling rel="import" href="web_compo/login_window.html">