What Is The Point Of Wrapping Javascript Statements In Parentheses?

I have discovered that wrapping different statements in parentheses will return the last one: (34892,47691876297,2000) => 2000 ('test',73,document.createElement('

Solution 1:

That is the comma operator :)

It lets you evaluate expressions from left to right, returning the last operand's result (which, in your case, isn't stored anywhere, and is perfectly valid).

Reference:

• http://www.ecma-international.org/ecma-262/5.1/#sec-11.14
• https://developer.mozilla.org/en-US/docs/JavaScript/Reference/Operators/Comma_Operator

Solution 2:

The most obvious point of this is to allow for multiple expressions in a for loop:

for (let x=3, y=6; x < 10; x++, y++) {...}
                           ^^^^^^^^

That's the comma operator, the same operator that also allows for the examples you provided

return (x, y)