const st = setTimeout;
And this module loads before can-zone, any time
st is used we won't be able to track that within the Zone.
To work around this, can-zone/register is used as a script that you run before any other modules.
require( "can-zone/register" );
At the top of your entry-point script.
In the Browser
You can either add a script tag above all others:
Or, if you're using a module loader / bundler, configure it so that can-zone/register is placed above all others in the bundle.