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

According to the specification it works like in Alternative A:

The production ConditionalExpression : LogicalORExpression ? AssignmentExpression : AssignmentExpression is evaluated as follows:

1. Let lref be the result of evaluating LogicalORExpression.
2. If ToBoolean(GetValue(lref)) is true, then
   • Let trueRef be the result of evaluating the first AssignmentExpression.
   • Return GetValue(trueRef).
3. Else
   • Let falseRef be the result of evaluating the second AssignmentExpression.
   • Return GetValue(falseRef).