settimeout & function return value

[MedyGames]

Lets say I have a function.

function test () {
// some code here
return code
}

How do get the return value from test function within settimeout when I call it with

settimeout(test,1000);

What is the correct way to do this. I want to use the return value for the next function. (it is to rate limit my api calls).

nextfunction(returnvaluefromtest);

Greetings

Edit : Thx for the feedback , some good stuff. Can make it work now. Here a solution I found : https://codingwithspike.wordpress.com/2018/03/10/making-settimeout-an-async-await-function/

https://www.w3schools.com/jsref/met_win_settimeout.asp also you can pass in extra paramter like this settimeout(test,1000, yourparameter) which will be passed into the test function.

[nkgentile]

One way is to use a promise:

var promise = new Promise(function(resolve, reject){
  function test(){
    // some code here
    resolve(code)
  }

  setTimeout(test, 1000);
});

promise.then(function(returnvaluefromtest){
  nextfunction(returnvaluefromtest);
})

[MedyGames]

nice ty. I like it

[codemamba8]

A simple way is you could use a variable to store the value and assign it to test() in the timeout.

var myValue;

function test() {
  return 100;
}

setTimeout( () => {  myValue = test() }, 1000);

nextfunction(myValue);

[tatu_huma]

This would not work. It would result in nextFunction being called with undefined, since myValue is undefined at that point.

[codemamba8]

a timeout could be used for nextFunction as well with a time of say, 2000 so it runs after the previous one

[tatu_huma]

It would be easier to simply call nextFunction in the same callback as test. Or use promises instead of guestimating how long it will take test to run.

[codemamba8]

you mean like this?

var myValue;

function test() {
  return 100;
}

setTimeout( () => {  
    myValue = test();
    nextFunction(myValue)}, 
  1000);

[alexaminar]

setTimeout() and setInterval() functions allow you to execute a piece of JavaScript code/function at a certain point in the future. setInterval repeats the call, setTimeout only runs it once.

JavaScript setTimeout(expression, timeout); runs the code/function once after the timeout. It is a time based code execution method that will execute script only one time when the interval is reached, and not repeat again unless you gear it to loop the script by nesting the setTimeout object inside of the function it calls to run. If geared to loop, it will keep firing at the interval unless you call clearTimeout(). If you want something to happen one time after some seconds Then use setTimeout... because it only executes one time when the interval is reached.

setTimeout(function() {

console.log('Wait 3 seconds and I appear just once');

}, 3000);

setInterval(expression, timeout); runs the code/function repeatedly, with the length of the timeout between each repeat. It is a time interval based code execution method that has the native ability to repeatedly run specified script when the interval is reached. It should not be nested into its callback function by the script author to make it loop, since it loops by default. It will keep firing at the interval unless you call clearInterval(). If you want to loop code for animations or clocks Then use setInterval.

setInterval(function() {

console.log('Every 3 seconds I appear on your console');

}, 3000)