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) or is.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 wordis.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 wordis.date (value)is.element (value)is.error (value)is.fn (value)is.function (value) - deprecated, because in ES3 browsers, "function" is a reserved wordis.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)FAQs
the definitive JavaScript type testing library
We found that custom-is demonstrated a not healthy version release cadence and project activity because the last version was released a year ago. It has 1 open source maintainer collaborating on the project.
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