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Active reading [<https://en.wiktionary.org/wiki/Boolean#Noun>].

edited Aug 8, 2022 at 0:26

You don't need to use !! inside an if expression.
It's being used the convert the value to a booleanBoolean, and the if does it by default.

var x = ""; // aA falsy value !x // true !!x // false if (x) === if (!!x)

You don't need to use !! inside an if expression.
It's being used the convert the value to a boolean, and the if does it by default.

var x = ""; // a falsy value !x // true !!x // false if (x) === if (!!x)

You don't need to use !! inside an if expression. It's being used the convert the value to a Boolean, and the if does it by default.

var x = ""; // A falsy value !x // true !!x // false if (x) === if (!!x)

answered Jun 10, 2012 at 20:15

You don't need to use !! inside an if expression.
It's being used the convert the value to a boolean, and the if does it by default.

var x = ""; // a falsy value !x // true !!x // false if (x) === if (!!x)