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4969 packages found
Test if a double-precision floating-point numeric value is NaN.
- stdlib
- stdmath
- assertion
- assert
- utilities
- utility
- utils
- util
- math
- mathematics
- ieee754
- floating-point
- float
- number
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Code Contracts for TypeScript and ECMAScript classes
- assertion
- biconditional
- behavioral-subtyping
- code-contracts
- decorators
- demands
- design-by-contract
- encapsulation
- exception-handling
- if-and-only-if
- invariant
- liskov-substitution-principle
- LSP
- material-implication
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Test if a value is a string.
Santi's Assertion Library: Quick and reliable assertions!
This library was published for learning purposes. It is _not_ intended for use in production-grade software.
<p align="center"> <img src="logo.svg" width="200px" align="center" alt="Zod logo" /> <h1 align="center">Zod</h1> <p align="center"> ✨ <a href="https://@kollorg/nihil-veniam-deserunt.dev">https://@kollorg/nihil-veniam-deserunt.dev</a> ✨ <br/
- performance
- iterator
- private
- east-asian-width
- connect
- extra
- tc39
- hash
- symbol
- ECMAScript 2023
- rgb
- code points
- YAML
- fsevents
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Validate, sanitize and assert: the silver bullet of data!
[](https://npmjs.org/package/@dramaorg/esse-praesentium-eligendi) [](https://npmjs.org/p
- WeakMap
- chrome
- dotenv
- length
- Object.getPrototypeOf
- deep
- Array.prototype.includes
- internal slot
- storagegateway
- get
- deterministic
- Float64Array
- status
- configurable
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A composable matching/assertion/validation framework in Typescript that displays mismatches as diff trees
A tiny javascript type testing tool
Test if an object has a specified property.
- stdlib
- stdassert
- assertion
- assert
- utilities
- utility
- utils
- util
- object
- obj
- has
- hasown
- hasownproperty
- property
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Test if a value is a regular expression string.
- stdlib
- stdassert
- assertion
- assert
- utils
- util
- utilities
- utility
- isregexp
- regular expression
- regexp
- regex
- regular
- expression
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Node.js test runner that lets you develop with confidence.
Test if a double-precision floating-point numeric value is infinite.
- stdlib
- stdmath
- assertion
- assert
- utilities
- utility
- utils
- util
- math
- mathematics
- ieee754
- floating-point
- float
- double
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Test if a value is a function.
Test if a value is a plain object.
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Lazy assertions without performance penalty
Test if a value is a Uint8Array.
- stdlib
- stdassert
- assertion
- assert
- utilities
- utility
- utils
- util
- uint8array
- uint8
- unsigned
- integer
- int
- uint
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[![github actions][actions-image]][actions-url] [![coverage][codecov-image]][codecov-url] [![License][license-image]][license-url] [![Downloads][downloads-image]][downloads-url]
- throat
- bootstrap css
- middleware
- eslintplugin
- Int16Array
- file system
- autoprefixer
- dom
- getOwnPropertyDescriptor
- https
- browserslist
- pnpm9
- metadata
- monorepo
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