Browse by Keyword: "is"

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component-is Simple type checking.

egal Strict equality test (like ===) that handles both built-in and custom value objects (those with the valueOf function).

image-type Detect the image type of a Buffer/Uint8Array

is-args Quickly check if a variable is an Arguments object

is-arguments Is this an arguments object? It's a harder question than you think.

is-bmp Check if a Buffer/Uint8Array is a BMP image

is-equal Are these two values conceptually equal?

is-extended Module for type detection

is-gif Check if a Buffer/Uint8Array is a GIF image

is-html Check if a string is HTML

is-integer Test if something is an integer (ES6 Polyfill)

is-it simple validations

is-jpg Check if a Buffer/Uint8Array is a JPEG image

is-jxr Check if a Buffer/Uint8Array is a JPEG XR image

is-localhost Is localhost predicate

is-nan ES6-compliant shim for Number.isNaN - the global isNaN returns false positives.

is-negative-zero Is this value negative zero? === will lie to you

is-png Check if a Buffer/Uint8Array is a PNG image

is-predicate A set of predicate functions to improve your value testing and comparisons.

is-property Tests if a JSON property can be accessed using . syntax

is-psd Check if a Buffer/Uint8Array is a PSD image

is-regex Is this value a JS regex?

is-simple Simple type checking for JavaScript in the browser and node.js

is-svg Check if a String/Buffer is SVG

is-tif Check if a Buffer/Uint8Array is a TIFF image

is-type Type checking from node core

is-type-of complete type checking for node

is-validation Input validation and manipulation library

is-webp Check if a Buffer/Uint8Array is a WebP image

isa type check

istype Cross-vm type checking utils for javascript

its Preconditions for safe coding

izzy A robust micro library for type checking. Defers to constructs' internal `[[Class]]` property rather than duck typing for excellent type detection and to avoid triggering false positives.

object-is ES6-compliant shim for - differentiates between -0 and +0

simple-is maximally minimal type-testing library

super-is super assertions

typeutil Typify your JavaScript functions.

util-is Additional Type Check functions for Util

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