Encountering the error message "Property 'material' is not available on type 'Object3D'" is common when attempting to use the getObjectByName method in Three JS

When I try to retrieve the material elements of my visualization using 

this.scene.getObjectByName("MeshName").material
, everything seems to be working fine. I can see the elements and they are printed successfully. However, I need to access these elements to change the opacity. The issue arises when I encounter the error message "Property 'material' does not exist on type 'Object3D'", preventing me from running ng build without using // @ts-ignore to bypass it. Can anyone explain why this error is occurring?

typescriptthree.js

Answer №1

It seems like the issue lies in the fact that the return type of getObjectByName() is Object3D, which does not have a material property.

If you are confident that "MeshName" is the name of a mesh, you will need to cast the returned object to a material in order to access the material property:

(this.scene.getObjectByName("MeshName") as THREE.Mesh).material

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