The nested setTimeout is a more flexible method than setInterval.… And here is the picture for the nested setTimeout:
The nested setTimeout… Zero delay setTimeout.There’s a special use case: setTimeout(func, 0), or just setTimeout(func).… The setTimeout call in it re-schedules itself with zero delay.… Zero delay scheduling with setTimeout(func, 0) (the same as setTimeout(func)) is used to schedule the
When the time is due for a scheduled setTimeout, the task is to run its callback.
…and so on.… When the engine browser is done with the script, it handles mousemove event, then setTimeout handler,… Highlight the first 100 lines, then schedule setTimeout (with zero-delay) for the next 100 lines, and… We can do that by wrapping the code in zero delay setTimeout.… To schedule a new macrotask:
Use zero delayed setTimeout(f).
When passing object methods as callbacks, for instance to setTimeout, there’s a known problem: “losing… Here’s how it may happen with setTimeout:… That’s because setTimeout got the function user.sayHi, separately from the object.… What if before setTimeout triggers (there’s one second delay!) user changes value?… For example, to setTimeout.
For instance:
arr.forEach(func) – func is executed by forEach for every array item.
setTimeout(func)… Here we had to create additional variables args and ctx so that the function inside setTimeout
Or, if we really need the children, we can defer access to them with zero-delay setTimeout.… If nested custom elements also use setTimeout to initialize themselves, then they queue up: the outer… setTimeout triggers first, and then the inner one.
In the example above, .catch added by setTimeout also triggers.
HTML language (e.g. tags) and also the BOM (browser object model) – various browser functions: setTimeout
approaches to fixing it, as discussed in the chapter Function binding:
Pass a wrapper-function, such as setTimeout
For instance, one such function is the setTimeout function.
(*) now returns new Promise, that becomes settled only after the call of resolve(githubUser) in setTimeout
another event-triggering call) at the end of onclick or, maybe better, wrap it in the zero-delay setTimeout
For the future, just note that “Step” command ignores async actions, such as setTimeout (scheduled function
Async iterables.Asynchronous iteration is needed when values come asynchronously: after setTimeout or
promise constructor and a simple executor function with “producing code” that takes time (via setTimeout
try...catch works synchronously
If an exception happens in “scheduled” code, like in setTimeout
We can’t insert an async operation like fetch, setTimeout in the middle of a transaction.