basic indexedDB wrapper

gistfile1.txt

// indexedDB doc: https://developer.mozilla.org/en-US/docs/Web/API/IndexedDB_API/Using_IndexedDB#basic_pattern
const pdb = new Promise((resolve, reject) => {

  const request = indexedDB.open("compiledCache", 1);

  request.onerror = (event) => reject(event);
  request.onsuccess = (event) => resolve(event.target.result);
  request.onupgradeneeded = (event) => {

    request.onsuccess = null;
    const db = event.target.result;
    const objectStore = db.createObjectStore("main", { keyPath: "key" });
    objectStore.transaction.oncomplete = event => resolve(db);
    objectStore.transaction.onerror = event => reject(event);
  }
});

async function withObjectStore(pdb, name, cb) {

  const transaction = (await pdb).transaction([name], "readwrite");
  const objectStore = transaction.objectStore(name);
  const request = cb(objectStore);
  return await new Promise((resolve, reject) => {

    request.onerror = event => reject(event);
    request.onsuccess = event => resolve(event.target.result);
  });
}


////
    
    
const compiledCache = {
  async get(key) {

    return await withObjectStore(pdb, 'main', objectStore => objectStore.get(key)).then(result => result?.value);
    //return window.localStorage.getItem(key);
  },
  async set(key, value) {

    return await withObjectStore(pdb, 'main', objectStore => objectStore.add({ key, value }));
    //window.localStorage.setItem(key, value);
  },
}