What is the result of AND'ed alerts?
importance: 3
What will this code show?
alert( alert(1) && alert(2) );The answer: 1, and then undefined.
alert( alert(1) && alert(2) );The call to alert returns undefined (it just shows a message, so there’s no meaningful return).
Because of that, && evaluates the left operand (outputs 1), and immediately stops, because undefined is a falsy value. And && looks for a falsy value and returns it, so it’s done.