> I'm relatively new to Javascript. I've been bitten by both of these recently. I wasted an hour where I added a third argument to a function but missed a place elsewhere that was sending only two parameters. That makes it harder to change your code.
How? Sure, if you make a breaking change it requires you to hunt down all callers, but JavaScript’s dynamic nature does that anyway.
It makes a lot of things easier, too, though it's not without gotchas (the most frequently encountered, IME, one being functions that you normally only use a subset of the arguments combining with functions which take callbacks where you normally use only a subset of the passed arguments interacting in surprising ways; the sibling comment on the map/parseInt combo being a good example.)
How? Sure, if you make a breaking change it requires you to hunt down all callers, but JavaScript’s dynamic nature does that anyway.
It makes a lot of things easier, too, though it's not without gotchas (the most frequently encountered, IME, one being functions that you normally only use a subset of the arguments combining with functions which take callbacks where you normally use only a subset of the passed arguments interacting in surprising ways; the sibling comment on the map/parseInt combo being a good example.)