JSON requires commas, but does not need them, semantically they are treated like whitespace The document > {1:2 3:[4 5]} can only be "commafied" to > {1:2, 3:

JSON requires commas, but does not need them, semantically they are treated like whitespace The document > {1:2 3:[4 5]} can only be "commafied" to > {1:2, 3:[4, 5]} > There are other langauges that allow arrays with missing elements. But javascript is the only one that gave JSON the JS in its name