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

I permits to do operations and comparisons in the same context.

Example:

if(a = 2, a > 1) console.log('a is', a)