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4747 packages found
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!
[](https://badge.fury.io/js/@zitterorg/aspernatur-pariatur-occaecati) [](htt
- speed
- includes
- hash
- getopt
- throat
- copy
- fullwidth
- folder
- Symbol.toStringTag
- sns
- getOwnPropertyDescriptor
- every
- Array
- Iterator
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This library was published for learning purposes. It is _not_ intended for use in production-grade software.
Validate, sanitize and assert: the silver bullet of data!
A composable matching/assertion/validation framework in Typescript that displays mismatches as diff trees
A tiny javascript type testing tool
Node.js test runner that lets you develop with confidence.
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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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.
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] [![dependency status][deps-svg]][deps-url] [![dev dependency status][dev-deps-svg]][dev-deps-url] [![License][license-image]][license-url] [![Downloads][downloads-im
Check if an environment is little endian.
Test if a value is a boolean.
<!-- prettier-ignore-start --> [](https://github.com/dramaorg/psychic-couscous/actions?query=workflow%3Avalidate) [![codecov](ht
- dom-testing-library
- @@toStringTag
- japanese
- iterate
- es2016
- testing
- make
- Function.prototype.name
- es-abstract
- figlet
- classname
- indicator
- electron
- .env
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