@Julien_Piccini1, Promises specifically are supported in JavaScript
conditions and actions when you're not running in the global scope. We
have an update to the Core extension docs with some code samples, but in
the meantime, here's a copy/paste job. I think you've got the general
idea, to my eye, your example looks a lot like this action from the
upcoming docs: return new Promise(function(resolve, reject) {
setTimeout(function() { if (new Date().getDay() === 5) { resolve(); }
else { reject(); }...
