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Window clearTimeout() Method

Window Object Reference Window Object

Example

Prevent the function set with the setTimeout() to execute:

var myVar;

function myFunction()
{
myVar = setTimeout(function(){alert("Hello")},3000);
}

function myStopFunction()
{
clearTimeout(myVar);
}

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Definition and Usage

The clearTimeout() method clears a timer set with the setTimeout() method.

The ID value returned by setTimeout() is used as the parameter for the clearTimeout() method.

Note: To be able to use the clearTimeout() method, you must use a global variable when creating the timeout method:

myVar = setTimeout("javascript function",milliseconds);

Then, if the function has not already been executed, you will be able to stop the execution by calling the clearTimeout() method.


Browser Support

Internet Explorer Firefox Opera Google Chrome Safari

The clearTimeout() method is supported in all major browsers.


Syntax

clearTimeout(id_of_settimeout)

Parameter Values

Parameter Description
id_of_settimeout Required. The ID value of the timer returned by the setTimeout() method

Return Value

No return value.


More Examples

Example

The following example has a "Start count!" button to start a timer, an input field that will count forever, and a "Stop count!" button that will stop the timer:

<button onclick="startCount()">Start count!</button>
<input type="text" id="txt">
<button onclick="stopCount()">Stop count!</button>

<script>
var c = 0;
var t;
var timer_is_on = 0;

function timedCount()
{
document.getElementById("txt").value=c;
c = c+1;
t = setTimeout(function(){timedCount()},1000);
}

function startCount()
{
if (!timer_is_on)
{
timer_is_on=1;
timedCount();
}
}

function stopCount()
{
clearTimeout(t);
timer_is_on=0;
}
</script>

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Window Object Reference Window Object

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