Glossary

See also

• https://developer.mozilla.org/en-US/docs/Glossary

Falsy

A falsy (sometimes written falsey) value is a value that is considered false when encountered in a Boolean context.

See also

• https://developer.mozilla.org/en-US/docs/Glossary/Falsy

Truthy

a truthy value is a value that is considered true when encountered in a Boolean context.

All values are truthy unless they are defined as falsy (i.e., except for false, 0, -0, 0n, “”, null, undefined, and NaN).

See also

• https://developer.mozilla.org/en-US/docs/Glossary/Truthy