Discussion on: 9 Extremely Powerful JavaScript Hacks

[Stephen Irving]

I also wanted to point out that #7 is especially useful when you are using ternary expressions, as you cannot chain an if statement within a big ternary, but you can using the && operator. A simple example would be using a ternary to write an if/else-if (rather than a basic if/else):

(condition
  ? truthyFunction()
  : condition2 && falsyFunction()
);

The corollary to this tip is using the || operator to basically say "If this is false, do the following":

condition || falsyFunction();