How to check whether an Object is Present in the scene or not in THREE.js?

Question

I want to add and remove objects to my scene in clicks.

Simply I use scene.add(object) and scene.remove(object).

Is there any way to check whether the object is present in the scene?

Answer 1

When adding your object to scene, add name to that object like

object.name = 'object_name';

Then you can check if your object exist in scene by

scene.getObjectByName('object_name');

If it return any object it means object exist in scene.

Answer 2

Probably more efficient: object.parent === scene