todo about async script tags

Author: kripken

emcc

@@ -1973,6 +1973,11 @@ try:
       if debug_level >= 4:
         generate_source_map(target)
       shutil.move(final, js_target)
+      # TODO: use an async blob, which would allow code rewriting on the client:
+      #   var blob = new Blob([codeString]);
+      #   var script = document.createElement('script');
+      #   script.src = URL.createObjectURL(blob);
+      #   document.body.appendChild(script);
       script_tag = '''<script async type="text/javascript" src="%s"></script>''' % base_js_target
       html.write(shell.replace('{{{ SCRIPT }}}', script_tag))
     else: