Vradhit – 16-20 Feb 4

How to convert async settime out to synchronous

11 Replies

Unknown User•3y ago

Message Not Public

in a dirty way you can use while (true) with date diffing to stop the loop but the question is: why do you need synchronous waiting?

Vradhit•3y ago

No I mean there was console.log('first') after that setTimeout(console.log('hi') , 0) Question is how to make settimeout console to display first followed by first console?

ScriptyChris•3y ago

you would like to await it

await new Promise(resolve => {
  setTimeout(() => {
    console.log('hi');
    resolve();
  }, 0) 
});
console.log('first');

await new Promise(resolve => {
  setTimeout(() => {
    console.log('hi');
    resolve();
  }, 0) 
});
console.log('first');

or .then() the promise instead of awaiting it !mdn await

reactibot•3y ago

MDN

await

ScriptyChris•3y ago

!mdn Promise.prototype.then

ScriptyChris•3y ago

By the way, your question indicates that you are new to event loop (or asynchrony at all) inside JS. So i'd recommend you to get familiar with it: https://www.youtube.com/watch?v=8aGhZQkoFbQ https://javascript.info/async

JSConf

YouTube

What the heck is the event loop anyway? | Philip Roberts | JSConf EU

JavaScript programmers like to use words like, “event-loop”, “non-blocking”, “callback”, “asynchronous”, “single-threaded” and “concurrency”. We say things like “don’t block the event loop”, “make sure your code runs at 60 frames-per-second”, “well of course, it won’t work, that function is an asynchronous callback!” If you’re anything like me...

Promises, async/await

Vradhit•3y ago

When we use await So the output is console.log('hi') console.log ('first') Thanks u @ScriptyChris

ScriptyChris•3y ago

though remember that await may only be used inside async function or at the top level of module file (or in console)

Vradhit•3y ago

Ok thank u very much

reactibot•3y ago

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