const fs = require('fs');
const fflate = require('fflate');

const zipObj = {};
zipObj['model.glb'] = new Uint8Array([1, 2, 3, 4, 5]);

const zipped = fflate.zipSync(zipObj);
const unzipped = fflate.unzipSync(zipped);

console.log(unzipped['model.glb']);