I am trying to use setInterval to call an API that has rate limit for requests per seconds. I tried to use setInterval as a while loop, but I can't find info on when it starts the next round.
So if I do:
setInterval(() => {
CallAPI();
// Some proccessing
}, 300)
Will the next round start after the first one finishes or regardless of it? because order matter, and also timing can cause an error.
I can also try to do the same with setTimeout and a while loop like so:
while(true) {
setTimeout(() => {
CallAPI();
// do some proccessing
}), 300
}
But again, I am not sure when the next round of the loop will start.
And lastly I cheat my way through it and do
while(true) {
await CallAPI();
// Do proccessing
await setTimeout(() => true, 300)
}
So what is the order for setTimeout() and setInterval() in a loop?
Just call it when it is done executing. No need for a loop.
function fakeCall () {
return new Promise((resolve) => {
window.setTimeout(resolve, Math.random() * 2);
});
}
function next() {
window.setTimeout( async function () {
await fakeCall();
console.log(Date.now());
next();
}, 3000);
}
next();You'll probably want to set up your loop as follows:
var TO_asyncLoop = null;
function asyncLoop(fn, ms){
clearTimeout(TO_asyncLoop);
TO_asyncLoop = setTimeout(() => { fn() }, ms)
}
var i = 0;
function doSomething(){
// do somthing
console.log("hi", i++);
// when this "something" is finished, do it again:
asyncLoop(doSomething, 500)
}
doSomething()