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168 packages found
A parameter management utility.
Type-check your function inputs with syntax like T(s, T.string, buf, Buffer, strings, T.list(T.string))
func allows you to declare functions with strict type-checked arguments that are validated at runtime using zod
Check if a string is a valid filename.
- check
- deno
- deno-edition
- deno-entry
- denoland
- es2022
- export-default
- file
- file format
- file name
- file naming
- file validation
- filename
- filename checking
- View more
Runtime type-checking for JavaScript.
Check that email addresses are really able to accept emails by pinging the DNS and checking for active MX records.
A simple, convenient way to represent domain objects, leverage domain knowledge, and add runtime validation in your code base.
simple express-validator wrapper for easier work with validation error handling
A simple function to check if a piece of data is truthy. JavaScript version.
- true
- false
- truthy
- falsy
- javascript
- validation
- checking
- data validation
- object validation
- array validation
- set validation
- map validation
a simple utility for validating types, such as strings, numbers, arrays, functions and so on
Function argument validation for humans
- type
- types
- check
- checking
- guard
- guards
- assert
- assertion
- predicate
- predicates
- is
- validate
- validation
- utility
- View more
Validate an email address according to RFCs 5321, 5322, and others
A library for synchronous and asynchronous input validation.
Defensive programming framework for TypeScript and JavaScript
a library for hassle-free type checking in Node.js
A request validator
- request
- validation
- request validation
- express
- collate
- typescript
- json
- schema
- schema validation
- sanitization
- type checking
- type
- check
Type check values. This is a fork of sindresorhus/is, but with CommonJS support.
Library for checking spaces in files
Runtime type system for TypeScript
Define shapes and types and use them for data/structure validation