How to validate gltf textures and bin files

Questions
#1

https://github.com/donmccurdy/three-gltf-viewer how three js Gltf is validating if all textures are present in the uploaded directory or not??? it also gives error if some texture file is not present.

#2

Try it with this npm package:

#3

this is not working in react js for browser!

         import * as validator from 'gltf-validator';
         fetch('scene.gltf')
              .then((response) => response.arrayBuffer())
              .then((asset) => validator.validateBytes(new Uint8Array(asset)))
              .then((report) => console.log('Validation succeeded: ', report))
              .catch((error) => console.error('Validation failed: ', error));

everytime getting error -> Invalid data: could not detect glTF format

SketchFab GLTF file : Gltf File