Trailing commas - JavaScript

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Summary of Commas · Use a listing comma in a list where and or or would be possible instead · Use a joining comma before and, or, but, yet or while followed by

commas It's the superhero of punctuation, but it has one weakness: commas can't go at the end of

commas Commas with Addresses With an address, place commas before and after each item after the first There is no comma between the state and a ZIP code (example