Skip to main content

Deno 2.3 is here with improved deno compile, local npm packages, and more 🚀

Search npm for packages to use with Deno

Millions of packages that you already know npm are just a few keystrokes away.
Add them to your projects with a simple command that will already feel familar.

is-number
Returns true if a number or string value is a finite number. Useful for regex matches, parsing, user input, etc.
cast check coerce coercion finite integer is isnan is-nan is-num is-number isnumber isfinite istype
is-empty
Check whether a value is "empty".
array check empty file is map object set value
empty-dir
Check if a directory is empty.
empty is-empty directory folder check
has-value
Returns true if a value exists, false if empty. Works with deeply nested values using object paths.
array boolean check deep empty function has hasOwn is-empty nested null number object object path
validate.io-number
Validates if a value is a number.
validate.io validate validation validator number numeric is type check isnumber
is-natural-number
Check if a value is a natural number
number natural check int integer math mathematics range browser client-side
@stdlib/assert-is-number
Test if a value is a number.
stdlib stdassert assertion assert utilities utility utils util number numeric is type check isnumber
is-fullwidth-code-point
Check if the character represented by a given Unicode code point is fullwidth
fullwidth full-width full width unicode character string codepoint code point is detect check east-asian-width
type-check
type-check allows you to check the types of JavaScript values at runtime with a Haskell like type syntax.
type check checking library
@sindresorhus/is
Type check values
type types is check checking validate validation utility util typeof instanceof object assert assertion
kind-of
Get the native type of a value.
arguments array boolean check date function is is-type is-type-of kind kind-of number object of
ts-interface-checker
Runtime library to validate data against TypeScript interfaces
typescript ts interface type validate validator check
empty-lite
Check empty for: array, string, object, function, number, date
empty check empty array check condition check empty string check empty object check empty function check empty result function check empty number check empty on date helper lite validation map
tcp-port-used
A simple Node.js module to check if a TCP port is already bound.
tcp port available free check networking
superstruct
A simple and composable way to validate data in JavaScript (and TypeScript).
api array assert cast check checker collection data error express hapi interface invalid joi
is-primitive
Returns `true` if the value is a primitive.
boolean check is number primitive string symbol type typeof util
is-empty-obj
Check if an object is empty or not.
is empty obj check if an object or not
file-type
Detect the file type of a file, stream, or data
mime file type magic archive image img pic picture flash photo video detect check
@stdlib/math-base-assert-is-odd
Test if a finite numeric value is an odd number.
stdlib stdmath assertion assert utilities utility utils util math mathematics float double dbl number
check-types
A little library for asserting types and values, with zero dependencies.
type types type-check type-checking duck-typing arguments parameters values data contract assert check verify safe