Saturday, 24 August 2013

Get argument count (or even names) of javascript function object

Get argument count (or even names) of javascript function object

I want to evaluate callback function before accepting it. This means I
need to know at least the count of accepted argumens - if count doesn't
match, I'll leave warning in console. But I can't find out, whether a
javascript function object has a property that would help me get that
information.
So can this be achieved without parsing function as string (not worth it)?

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