null vs undefined
null
is an assigned value. It means nothing.undefined
means a variable has been declared but not defined yet.null
is an object.undefined
is of typeundefined
.null !== undefined
butnull == undefined
.
Last updated
null
is an assigned value. It means nothing.
undefined
means a variable has been declared but not defined yet.
null
is an object. undefined
is of type undefined
.
null !== undefined
but null == undefined
.
Last updated