The definitive JavaScript type testing library
To be or not to be? This is the library!
As a node.js module
$ npm install is
As a component
$ component install enricomarino/is
is.a
(value, type) oris.type
(value, type)is.defined
(value)is.empty
(value)is.equal
(value, other)is.hosted
(value, host)is.instance
(value, constructor)is.instanceof
(value, constructor) - deprecated, because in ES3 browsers, "instanceof" is a reserved wordis.nil
(value)is.null
(value) - deprecated, because in ES3 browsers, "null" is a reserved wordis.undef
(value)is.undefined
(value) - deprecated, because in ES3 browsers, "undefined" is a reserved word
is.args
(value)is.arguments
(value) - deprecated, because "arguments" is a reserved wordis.args.empty
(value)
is.array
(value)is.array.empty
(value)is.arraylike
(value)
is.bool
(value)is.boolean
(value) - deprecated, because in ES3 browsers, "boolean" is a reserved wordis.false
(value) - deprecated, because in ES3 browsers, "false" is a reserved wordis.true
(value) - deprecated, because in ES3 browsers, "true" is a reserved word
is.date
(value)
is.element
(value)
- is.error (value)
is.fn
(value)is.function
(value) - deprecated, because in ES3 browsers, "function" is a reserved word
is.number
(value)is.infinite
(value)is.decimal
(value)is.divisibleBy
(value, n)is.integer
(value)is.int
(value) - deprecated, because in ES3 browsers, "int" is a reserved wordis.maximum
(value, others)is.minimum
(value, others)is.nan
(value)is.even
(value)is.odd
(value)is.ge
(value, other)is.gt
(value, other)is.le
(value, other)is.lt
(value, other)is.within
(value, start, finish)
is.object
(value)
is.regexp
(value)
is.string
(value)
is.base64
(value)is.hex
(value)
is.symbol
(value)