Question

19

rated 0 times [ 22] [ 3] / answers: 1 / hits: 137205 / 13 Years ago, sun, january 1, 2012, 12:00:00

in javascript,

var a = '';

var b = (a) ? true : false;

var b will be set to false.

is this a defined behavior that can be relied upon?

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Member since Fri, Dec 23, 2022

1 Year ago

answered 13 Years ago mckaylab · Accepted Answer

Yes. Javascript is a dialect of ECMAScript, and ECMAScript language specification clearly defines this behavior:

ToBoolean

The result is false if the argument is the empty String (its length is zero);
otherwise the result is true