Promise of zero duration tween is not resolved

[benwick]

Well, it is all in the title. Every tween has a then method to wait for a promise. If the tween has a duration of zero the promise is not resolved. That can't be right, can it?

Here is a quick pen: https://codepen.io/benwick83/pen/OJeEmmV

• newest version
• alert is not shown
• change the duration to something other than zero, alert will pop up