Operator precedence for JS spread and rest operators?

9
votes

I'm curious what the precedence of the Spread and Rest operators are in Javascript: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Spread_operator

I was trying to find them on MDN's Operator Precedence table (https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Operator_Precedence#Table) but unless they are a subcategory of an existing operator type, I don't see them. I couldn't find any other obvious documentation about it.

1
javascriptecmascript-6
It had been part of that table since 2014 but I fixed it last month :-) – Bergi
@Bergi: thank you! I can’t believe someone added that to the table o_O but who knows, things were still in flux in 2014 – Felix Kling

1 Answers

19
votes

Spread syntax is not an operator and therefore does not have a precedence.

It is part of the array literal and function call (and object literal) syntax.

Similarly, rest syntax is part of the array destructuring and function parameter (and object destructuring) syntax.