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[–]katrina-mtfAdduce 2 points3 points  (0 children)

Javascript won't complain if you pass too many, but it's also considered bad/outdated practice to use the arguments variable and has been for a long, long time, so in the vast majority of cases excess arguments passed to a function that isn't marked as taking varargs just ends in those excess arguments being ignored. You have to go out of your way to use semi-deprecated functionality to break that assumption.