Sign Up to our social questions and Answers Engine to ask questions, answer people’s questions, and connect with other people.
Login to our social questions & Answers Engine to ask questions answer people’s questions & connect with other people.
Lost your password? Please enter your email address. You will receive a link and will create a new password via email.
Please briefly explain why you feel this question should be reported.
Please briefly explain why you feel this answer should be reported.
Please briefly explain why you feel this user should be reported.
Why is it that an empty string evaluates to false in JavaScript. I know Douglas Crockford has spoken quite a bit about truthy and falsy in javascript but this still surprised me:
if("")
alert("you will never see this");
Anyone know what the basis of this behavior is. Is it implemented in this way according to the ECMAScript specifications? I’m curious.
Because it has nothing in it. An empty string is a false value in many languages. This is standard according to the specification.
— section 9.2 of Ecma-262