In Javascript, what is the scope of variables used in setTimeout? - Stack Overflow

I am using the following code in a function:

setTimeout("doSomething(var1)",10000);

But, I also have var1 available as global variable. After 10000 milliseconds, will it call the local var1 or the global var1?

I am using the following code in a function:

setTimeout("doSomething(var1)",10000);

But, I also have var1 available as global variable. After 10000 milliseconds, will it call the local var1 or the global var1?

• javascript
• global-variables
• settimeout

Share Improve this question Follow edited Apr 25, 2011 at 14:51 Donut 113k2020 gold badges135135 silver badges147147 bronze badges asked Apr 25, 2011 at 14:50 Salman VirkSalman Virk 12.3k99 gold badges3838 silver badges4747 bronze badges

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2 Answers 2

Sorted by: Reset to default 15

This:

setTimeout('doSomething(var1)', 10000);

will pass the global variable var1,

And this:

setTimeout(function() { doSomething(var1); }, 10000);

will pass the local variable var1.

Live demo: http://jsfiddle/simevidas/EQMaz/

It will pass the the global variable named var1.