<script src> in custom element puts methods in global scope

[ebidel]

Currently, foo() is not seen in global scope (index.html that uses x-element). Good!
But bar() is from app.js. Not x-element.html contains <script='app.js'></script>.

app.js:
function bar() {}

x-element.html:


<script='app.js'></script>
...

<script> function foo() { } </script>