JavascriptJquery commenting causing errors in IE - Stack Overflow

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So this post is not so much of a "please help me fix it" post as much as it is a "why would changing that make it work?". So I had some javascript/jquery written that was working in firefox and chrome, but IE threw errors.

I could not figure it out even with the helpful posts from users here at stackoverflow. I eventually stumbled upon the answer (as I seem to find myself doing a lot with coding).

I was doing a somewhat rigorous style of menting taught to me by one of my puter science professors where a function would have menting such as this:

//@ describe function
//@ params: param1 - function, param2 - function
//@ etc....

So I foolishly threw this into my javascript only to find out that IE really did not care for this much at all. When I removed the @ symbols the code worked perfectly.

So my question is why this caused errors in IE? Shouldn't whatever follows the '//' ments not matter?

So this post is not so much of a "please help me fix it" post as much as it is a "why would changing that make it work?". So I had some javascript/jquery written that was working in firefox and chrome, but IE threw errors.

I could not figure it out even with the helpful posts from users here at stackoverflow. I eventually stumbled upon the answer (as I seem to find myself doing a lot with coding).

I was doing a somewhat rigorous style of menting taught to me by one of my puter science professors where a function would have menting such as this:

//@ describe function
//@ params: param1 - function, param2 - function
//@ etc....

So I foolishly threw this into my javascript only to find out that IE really did not care for this much at all. When I removed the @ symbols the code worked perfectly.

So my question is why this caused errors in IE? Shouldn't whatever follows the '//' ments not matter?

• javascript
• jquery
• internet-explorer
• ments

Share Improve this question Follow edited Jul 27, 2013 at 7:52 Dave Chen 11k88 gold badges4141 silver badges7171 bronze badges asked Jul 8, 2011 at 23:04 Nathaniel WendtNathaniel Wendt 1,20244 gold badges2424 silver badges4949 bronze badges

Add a ment  | 

2 Answers 2

Sorted by: Reset to default 8

It does indeed look like some kooky IE conditional ment support. It appears that if @ is the first character of a ment (whether it starts with //@ or /*@, then IE looks for a conditional ment directive after the @ sign. See http://msdn.microsoft./en-us/library/8ka90k2e(v=vs.94).aspx for some examples.

AlienWebguy's suggestion should work because the first character of the ment is *. You could probably also just put a space before the @ sign:

// @ describe function
// @ params: param1 - function, param2 - function
// @ etc....

You might be thinking of docblock menting, which you would want to wrap in block ment syntax:

/**
 * Function does this
 * @param <string> $str The string
 * @param <array> $arr The array
 * @return <bool> true if string is in array, false if not
*/

I can see IE just being stupid. Odds are even if there is an explanation for why your //@ didn't work, it'll likely be a really stupid one, and odds are that only a small percentage of us would even be able to recreate it on our version of IE.

IE is the only browser to my knowledge that looks at conditional ments, so I can see them having a different ment parser than all other browsers which would conflict with otherwise proper code.

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