setTimeout Internet Explorer

Question

I have the following javascript in MSIE:

setTimeout(myFunction, 1000, param ); 

this seems to work in all browsers except internet explorer. the param just doesnt get forwarded to the function. looking at the debugger, it is undefined.

Answer 1

param in Internet explorer specifies whether the code in myFunction is JScript, JavaScript or VBscript ^{See also: MSDN}. It does not behave like other browsers.

The following will work:

setTimeout(function() {     myFunction(param); }, 1000); 

The previous line does not exactly mimic setTimeout in Firefox etc. To pass a variable, unaffected by a later update to the param variable, use:

setTimeout( (function(param) {     return function() {         myFunction(param);     }; })(param) , 1000); 

Answer 2

Internet Explorer does not allow you to pass parameters like that. You'll have to do it explicitly from the callback function:

setTimeout(function(){     myFunction(param); }, 1000); 

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Quote from MDN:

Note that passing additional parameters to the function in the first syntax does not work in Internet Explorer.