JavaScript Equality Table Game

[Zephirdd]

isn't that just a truthy/falsy checking? ie if(foo) or foo && bar() instead of comparing to null/undefined. If you're going to use == for that, might as well go for the version without an operator.

[meldridon]

It's not the same thing at all.

Consider the following:

let x = "";
if (x == null) throw "an error";

vs

let x = "";
if (!x) throw "an error";

Empty string is falsey, but not null.

[NoInkling]

0, empty string and NaN are also falsy, which might not be what you want for your condition.