is-jpg
Check if a Buffer/Uint8Array is a JPEG image
Check if a Buffer/Uint8Array is a JPEG image
A type checking library where each exported function returns either true or false and does not throw. Also added tests.
Coalesce for JavaScript. Returns the first value that is not undefined or null.
Check if a Buffer/Uint8Array is a GZIP file
Binary wrapper for Flow - A static type checker for JavaScript
Type checking and DDD for JavaScript
Function argument validation for humans
Check if a Buffer/Uint8Array is a GIF image
Simple module to get instance type. Like a bit more advanced version of typeof
Small utility functions to use the same traversing etc code on different types
Type assertions aka less-broken `typeof`
Utilities to get and check variable types (isString, isPlainObject, isRegExp, etc)
Check if a Buffer/Uint8Array is available for cwebp image source
Collection of useful helper functions when trying to determine module type (CommonJS or AMD) properties of an AST node.
Get the type of an AMD module used for an AST node or within a file
Just a reasonable typeof
Use the system-ui font family in CSS
Check if a Buffer/Uint8Array is a TAR file
A simple and composable way to validate data in JavaScript (and TypeScript).
Guess what? It gives you OS family. Whoa!