浏览器中常见的内置javascript异步函数有哪些？

Question

Functions like setTimeout , setInterval etc. which are part of the browser(and not of JS engine) are asynchronous in nature, what are some other built-in functions or methods that are asynchronous, which are either part of JS engine or of a browser?

Also is it possible to implement something like setTimeout from with just javascript without using any browser APIs?

Answer 1

 //setTimeout function without in-built function let sleep = (interval) => { const previousTime = Date.now() while(Date.now() - previousTime < interval){ //do nothing } } let mySetTimeout = (interval, func) => { sleep(interval) func() } let greet = () => { console.log("Hi") } mySetTimeout(5000, greet)