Sleep in Javascript

Question

Any way I can do a sleep in javascript before it's carry another action?

Example:

 var a = 1+3;
 // sleep 3 seconds before the next action here
 var b = a + 4;

Answer 1

You can use setTimeout to achieve a similar effect:

var a = 1 + 3;
var b;
setTimeout(function() {
    b = a + 4;
}, (3 * 1000));

This doesn't really 'sleep' JavaScript—it just executes the function passed to setTimeout after a certain duration (specified in milliseconds). Although it is possible to write a sleep function for JavaScript, it's best to use setTimeout if possible as it doesn't freeze everything during the sleep period.

Steve

Answer 2

setTimeout ( "doSomething()", 5000 );

function doSomething ( )
{
  // (do something here)
}

IMPORTANT: make sure you put quotes around the function you would like to call with setTimeout().

setTimeout() doesn't halt the execution of the script during the timeout period. It just schedules the specified expression to be run at the specified time.