Is Packages

Check if a Buffer/Uint8Array is a wav file.

Check if a Buffer/Uint8Array is a FLAC file.

Check if a URL is from localhost

Check if a string is the value of `border-style` property

Curried TypeScript type guards for primitive types and classes

Elvis operator functionality for JavaScript.

BEM entity name representation

whether the given object is a WebGL context

Is the input (plain object, array, string or whatever) not empty?

Returns a filtered copy of an object with only the specified keys, exactly like `pick` from lo-dash / underscore.

Percentage helper functions.

Validates if a value is infinite.

Check if an environment is little endian.

Checks if value is array.

Check if a Buffer/Uint8Array is a WebP image

Type check values: `is.string('🦄') //=> true`

Checks if two arrays are equal.

Check if a Buffer/Uint8Array is a BMP image

Check if a Buffer/Uint8Array is a TIFF image

Check if a Buffer/Uint8Array is a JPEG XR image