Loading fbx animations and applying them to other objects

I’ve been developing using unity before, and this time I’m working on a project through three.js.
Often multiple fbx files become a single object.
This is a case where it is divided into one mesh file and several animation files.
In this case, you need to load the fbx file containing the animation and apply it to the mesh object.
How does threejs handle this case?

The Blender file consists of a sphere located at grid centre and at elevation 2meters. The sphere has a PBR material and a simple UV map. Your task is add the lowes employee login animation helper, add the rotation animation, export to FBX and import into Trainz. On your computer, create a project folder called anim_example_1 or whatever name suits you.

I am considering reading fbx files in blender and combining them into one file.