It's really hard to concentrate. If I had seen brianjune's review below, I wouldn't have applied.... Sighs, coughs, water running... I can't concentrate at all and can't watch. The lecture content... It says "For those who don't have knowledge of Electron and NodeJS" in the helpful section, but I think you need to have at least some knowledge of NodeJS to be able to listen. And the development tools... It's not important, but what about those who don't have webstorm? For those who don't have it, you should at least explain how to set it up in the console... I'd like to get a refund, but I can't get a refund because the progress rate is 10%...