Correct way of using electron-json-storage from renderer process

[vikdotdev]

When I use storage inside renderer process to write data on unload event. It works about 50% of the time, another outcome is that it produces file that looks like this data.json.2866685502.

When renamed without numbers the data inside is intact. On app restart the data obviously won't load. It looks like something locks the file and I have no idea what could cause that. storage is not used anywhere else except the code below.

Am I implementing it the right way ? What can cause the file to be locked? I'm new to electron and distributed software so I apologize if that's something obvious :)

renderer.js

DownloadData.retrieve().then(i => currentInstance = i);

window.addEventListener('unload', () => {
  if ( currentInstance ) {
    DownloadData.store(currentInstance);
  }
})

downloadData class methods:

  static retrieve () {
    return new Promise((resolve) => {
      storage.has('data', (err, hasKey) => {
        if (hasKey) {
          storage.get('data', (err, data) => {
            const instance = new DownloadData({ data })
            resolve(instance);
          });
        } else resolve( null );
      });
    });
  }

  static store (currentInstance) {
    storage.set('data', currentInstance, err => {
      if (err) throw err;
    });
  }

I'm on win10, electron-json-storage version 4.1.6

[vikdotdev]

I figured it out. I simply needed to make store method return a promise and close on promise resolve.

[jviotti]

I'm glad you figured it out! Let us know if you still need any help