Why arguments in all JavaScript Documentation are written like this? - 


json.stringify(value[, replacer[, space]])

all on mdn, documentation represents arguments value[, replacer[, space]]. reason behind it?

what purpose of square brackets?

square brackets used lot of programming environments, command line tools , documentation show arguments optional.

the double brackets mean supplying 1 of optional arguments doesn't force provide value others.

that means replacer optional, , if provide it, space optional again, , can't specify space without specifying replacer.

this opposed to: (sample)

json.stringify(value[, replacer, space])

where need provide value space if provide value replacer.


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