How is the ternary operator evaluated in JavaScript?

Question

Regarding the ternary (? :) operator in JavaScript, I would like to know how it is evaluated by a typical browser\'s JavaScript interpreter:

Alternative A:<

Answer 1

The ternary operator evaluates lazily for several reasons.

1. It's inefficient to evaluate all the operands when you are only going to return either the if or the else
2. Doing lazy evaluation allows you to do things like x != 0 ? 10 / x : 10; If it evaluated everything at the same time you would get a divide by zero error if x were zero