Thank you, Nate.
One more question.
I try the code like this :
this.skel?.setAnimation(0, "animation1", true);
console.log("path constraint's position : " + this.skel?._skeleton.pathConstraints[0].position);
this.skel?._skeleton.pathConstraints[0].position = 0.45;
console.log("path constraint's position after set position : " + this.skel?._skeleton.pathConstraints[0].position);
https://gist.github.com/j-park-serori/37c0b116feff134c7923372a716ccc8a
And have error like this.
In this case,
what is my missing point?
It solved!
I just change the code from
this.skel?._skeleton.pathConstraints[0].position = 0.45;
to
this.skel!._skeleton.pathConstraints[0].position = 0.45;