Javascript: Call a function after specific time period

In JavaScript, How can I call a function after a specific time interval?

Here is my function I want to run:

function FetchData() {
}

Solution 1:

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.i.e.

1. setInterval(): executes a function, over and over again, at specified time intervals
2. setTimeout() : executes a function, once, after waiting a specified number of milliseconds

Solution 2:

Execute function FetchData() once after 1000 milliseconds:

setTimeout( function() { FetchData(); }, 1000);

Execute function FetchData() repeatedly every 1000 milliseconds:

setInterval( FetchData, 1000);

Solution 3:

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.