require('fake-indexeddb/auto');

const STORE_NAME = 'TEST';
const testId = 'test-id';
const file = new File([
  'hello world!'
], 'file.txt');


console.log('File prototype:', Object.getPrototypeOf(file)); //  Blob [File] { name: [Getter], lastModified: [Getter] }

const request = indexedDB.open("test", 3);
request.onupgradeneeded = function () {
  const db = request.result;
  const store = db.createObjectStore(STORE_NAME);

  store.put({
    title: "My test record",
    file
  }, testId);
}
request.onsuccess = function (event) {
    const db = event.target.result;

    const tx = db.transaction(STORE_NAME);

    tx.objectStore(STORE_NAME).get(testId).addEventListener("success", function (event) {
      const result = event.target.result;
      console.log("RETRIEVED:", result); // prints { title: 'My test record', file: Blob { size: 12, type: '' } }
      console.log('File prototype', Object.getPrototypeOf(result.file)); // the prototype of the file is now Object [Blob]
    });
    tx.oncomplete = function () {
      console.log("All done!");
    };
};