Javascript setInterval function to clear itself?

javascript setinterval clearinterval

user1017882 · Aug 23, 2012 · Viewed 56.3k times · Source

myInterval = setInterval(function(){
     MyFunction();
},50);

function MyFunction()
{
    //Can I call clearInterval(myInterval); in here?
}

The interval's not stopping (not being cleared), if what I've coded above is fine then it'll help me look elsewhere for what's causing the problem. Thanks.

EDIT: Let's assume it completes a few intervals before clearInterval is called which removes the need for setTimeout.

Answer

As long as you have scope to the saved interval variable, you can cancel it from anywhere.

In an "child" scope:

var myInterval = setInterval(function(){
     clearInterval(myInterval);
},50);

In a "sibling" scope:

var myInterval = setInterval(function(){
     foo();
},50);

var foo = function () {
    clearInterval(myInterval);
};

You could even pass the interval if it would go out of scope:

var someScope = function () {
    var myInterval = setInterval(function(){
        foo(myInterval);
    },50);
};

var foo = function (myInterval) {
    clearInterval(myInterval);
};

Javascript setInterval function to clear itself?

Answer

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