JavaScript Asynchronous Execution Mechanism
Review: JavaScript language-defined callbacks, promises, await, async JavaScript/NodeJS engine (libuv) OS IO multiplexing (epoll) Understanding how async functions work and are implemented makes it easier to read and debug JavaScript code. 1. Introduction For programmers accustomed to thread pools, multi-processes, and message queues, there are a few concepts to understand when using JavaScript/NodeJS: Callbacks, Promises, Async Await IO multiplexing and async access 2. Callbacks, Promises, Async Await There’s a YouTube video Async JS Crash Course - Callbacks, Promises, Async Await that explains these concepts clearly in 24 minutes. ...