Thread:Talk:Requests for comment/API Future/Need help with ApiEx template

I would like the Template:ApiEx hide the result of the execution, and it seems wikipedia:en:template:Hidden begin is exactly what would work (with the label on the left), but I couldn't get it to work properly. There seems to be a javascript bug on this site, showing up the "hide" label twice, and it only semi-works in chrome, not firefox. Thanks!