Import/export indexedDB database

export.js

(() => {
  indexedDB.open('postman-app').onsuccess = async event => {
    let db = event.target.result;
    let transaction = db.transaction(db.objectStoreNames);
    // TODO: Create and download a file instead of outputting the contents
    console.log(
      Object.fromEntries(
        await Promise.all(
          [...db.objectStoreNames]
          .map(
            objectStoreName =>
              new Promise(resolve =>
                transaction
                .objectStore(objectStoreName)
                .getAll()
                .onsuccess = e => resolve([
                  objectStoreName,
                  e.target.result
                ])
              )
          )
        )
      )
    );
  };
})();