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

[jey-exp]

Where do you use this? Can figure out any other way around.

[minwork]

I've also encountered that case. Imagine you have a variable holding animation duration, if the animation should be instant you just set the duration to 0. Of course you could always make an if and return regular Promise.resolve() in that case but that is counter-intuitive and unnecessary complicates the API call.

[jey-exp]

okay, Will setting the duration to 0.1 and ease to none will solve this?

[minwork]

It would be just another workaround and not optimal one. To clearly illustrate the case here is the exact code and workaround needed for the current behaviour.