is

The definitive JavaScript type testing library

To be or not to be? This is the library!

Installation

As a node.js module

$ npm install is

As a component

$ component install enricomarino/is

API

general

• 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 word
• is.nil (value)
• is.null (value) - deprecated, because in ES3 browsers, "null" is a reserved word
• is.undef (value)
• is.undefined (value) - deprecated, because in ES3 browsers, "undefined" is a reserved word

arguments

• is.args (value)
• is.arguments (value) - deprecated, because "arguments" is a reserved word
• is.args.empty (value)

array

• is.array (value)
• is.array.empty (value)
• is.arraylike (value)

boolean

• is.bool (value)
• is.boolean (value) - deprecated, because in ES3 browsers, "boolean" is a reserved word
• is.false (value) - deprecated, because in ES3 browsers, "false" is a reserved word
• is.true (value) - deprecated, because in ES3 browsers, "true" is a reserved word

date

• is.date (value)

element

• is.element (value)

error

• is.error (value)

function

• is.fn (value)
• is.function (value) - deprecated, because in ES3 browsers, "function" is a reserved word

number

• 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 word
• is.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)

object

• is.object (value)

regexp

• is.regexp (value)

string

• is.string (value)

encoded binary

• is.base64 (value)
• is.hex (value)

Symbols

• is.symbol (value)

BigInts

• is.bigint (value)

Contributors

• Jordan Harband

Current Tags

• 3.3.0                                ...           latest (7 years ago)

30 Versions

• 3.3.0                                ...           7 years ago
• 3.2.1                                ...           9 years ago
• 3.2.0                                ...           9 years ago
• 3.1.0                                ...           10 years ago
• 3.0.1                                ...           11 years ago
• 2.2.1                                ...           11 years ago
• 2.2.0                                ...           11 years ago
• 2.1.0                                ...           11 years ago
• 2.0.2                                ...           11 years ago
• 2.0.1                                ...           11 years ago
• 2.0.0                                ...           11 years ago
• 1.1.0                                ...           11 years ago
• 1.0.0                                ...           11 years ago
• 0.3.0                                ...           12 years ago
• 0.2.7                                ...           12 years ago
• 0.2.6                                ...           12 years ago
• 0.2.5                                ...           13 years ago
• 0.2.4                                ...           13 years ago
• 0.2.3                                ...           13 years ago
• 0.2.2                                ...           13 years ago
• 0.2.1                                ...           13 years ago
• 0.2.0                                ...           13 years ago
• 0.1.6                                ...           13 years ago
• 0.1.5                                ...           13 years ago
• 0.1.4                                ...           14 years ago
• 0.1.3                                ...           14 years ago
• 0.1.2                                ...           14 years ago
• 0.1.1                                ...           14 years ago
• 0.1.0                                ...           14 years ago
• 0.0.7                                ...           14 years ago