Difference between arguments in setInterval calls

Posted by Martin Janiczek on Stack Overflow See other posts from Stack Overflow or by Martin Janiczek
Published on 2011-01-18T01:43:05Z Indexed on 2011/01/18 1:53 UTC
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JavaScript

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difference

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timing

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setinterval

What's the difference between these setInterval calls and which ones should be used?

setInterval("myFunction()",1000)
setInterval("myFunction",1000)
setInterval(myFunction(),1000)
setInterval(myFunction,1000)

My guess is that JS uses eval() on the first two (strings) and calls the latter two directly.

Also, I don't understand the difference between the calls with and without parentheses. The ones with parentheses call it directly and then periodically call its return value?

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