In JavaScript, How can I call a function after a specific time interval?
Here is my function I want to run:
function FetchData() {
}
You can use JavaScript Timing Events to call function after certain interval of time:
This shows the alert box every 3 seconds:
setInterval(function(){alert("Hello")},3000);
You can use two method of time event in javascript.ie
setInterval()
: executes a function, over and over again, at specified time intervals setTimeout()
: executes a function, once, after waiting a specified number of milliseconds Execute function FetchData()
once after 1000 milliseconds:
setTimeout( function() { FetchData(); }, 1000);
Execute function FetchData()
repeatedly every 1000 milliseconds:
setInterval( FetchData, 1000);
ECMAScript 6 introduced arrow functions so now the setTimeout() or setInterval() don't have to look like this:
setTimeout(function() { FetchData(); }, 1000)
Instead, you can use annonymous arrow function which looks cleaner, and less confusing:
setTimeout(() => {FetchData();}, 1000)
sounds like you're looking for setInterval . It's as easy as this:
function FetchData() {
// do something
}
setInterval(FetchData, 60000);
if you only want to call something once, theres setTimeout .
setTimeout(() => {
console.log('Hello Timeout!')
}, 3000);
setInterval(() => {
console.log('Hello Interval!')
}, 2000);
setTimeout(func, 5000);
-- it will call the function named func() after the time specified. here, 5000 milli seconds, ie) after 5 seconds
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