Microtask Queue How Asyncawait Works Internally React Native Interview 3 9

Summary

One call stack, one thing at a time. Yet network requests, timers, and taps all get handled without freezing the screen. Takeaway: ... Learn how the browser event loop, task queue, What's the difference between Promises and JavaScript has exactly one thread. Yet your app fetches data, runs timers, and responds to taps, all at once. Takeaway: One ... Close the app, reopen it, and the user is still logged in, still in dark mode. Something saved that data on the device. Takeaway: ... Async doesn't mean free. Too many promises can freeze a set timeout with zero milliseconds doesn't run immediately. And a login, then profile, then posts flow can't run in parallel. Three API calls one after another take three times as long. Run them together and you only wait for the slowest. Takeaway: Run ...