Open
Description
As external scripts are removed from the content and then evaluated by inserting them into head, they end up being evaluated async which causes somes dependent symbols not to work. See this example
<script src='external_script_with_function'/>
<script type='text/javascript'>
function_from_external_script_above();
</script>
function_from_external_script_above() won't work!
Commenting the line obj.scripts = findAll(obj.contents, 'script[src]').remove() workarounded the issue.
I understand that a sync evaluation may hang the application, but as this example demonstrate it is necessary on some cases. I suggest a configuration to support both behaviours or support only the sync behaviour.