3 ms·JavaScript doesn't (didn't?) let you put a trailing comma in function parameter lists, annoyingly.by weberc2 9y agoJavaScript doesn't (didn't?) let you put a trailing comma in function parameter lists, annoyingly.Arnavion 9y agoMade legal in ES2017.teddyh 9y agoBut not in JSON, since that is based on ECMA-262 3rd Edition from December 1999.