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Asked: 2026-05-25T12:21:07+00:00

The code: setInterval(doSomething(), 2000); function doSomething(){alert(‘hi’)} demo: http://jsfiddle.net/PRff7/ I’ve been reading about this and

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The code:

setInterval("doSomething()", 2000);
function doSomething(){alert('hi')}

demo: http://jsfiddle.net/PRff7/

I’ve been reading about this and I just can’t get the example to work 🙁

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1 Answer

  1. Editorial Team

    Your code isn’t executing because of jsfiddle. It wrapped your code in an onload handler, thus keeping doSomething out of the global namespace. So when setTimeout tried to execute your code, it couldn’t find doSomething. Change jsfiddle to execute “no wrap”, and all is well: http://jsfiddle.net/gilly3/PRff7/3/

    If you don’t wrap your call to doSomething in a string, it will also work because setInterval gets a direct reference to doSomething which is in the same scope. It doesn’t need a global reference.

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