Why does javascript accept commas in if statements?

Question

I stumbled across some javascript syntax that seemed like it should produce a parse error of some kind but doesn\'t:

if (true, true) {console.log(\'splendid         


        

Answer 1

The comma operator chains multiple expressions together, and the result of the operation is the value of the last operand. The only real use for it is when you need multiple side effects to occur, such as assignment or function calls.