I've added a new drawing event to let you change the style before drawing the feature on the map:

anim.on('drawing', function(e) {
  if (e.time > 5000) {
     e.style = styleRed;
  } else {
     e.style = styleBlue;
  }
})

Tell me if it's good for you.

It seems to add the values of e.rotation and e.style to the same key.

If I want to apply a different style for each angle, should I proceed with branching using the e.rotation value?

I fix it!
and update the example: https://viglino.github.io/ol-ext/examples/animation/map.featureanimation.path.html

Thank you so much!
Could you please proceed with the deployment so that I can get an update from React?

v4.0.17 is out

Thank you. I'm trying out the features you updated.
But when I try to set the style I want to use, there's a phenomenon where it's empty because it doesn't render and then reappears when the animation ends.

Do you have an online example?