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5548 packages found
Function argument validation for humans
- type
- types
- check
- checking
- guard
- guards
- assert
- assertion
- predicate
- predicates
- is
- validate
- validation
- utility
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Ensure type safety in your JavaScript code with compilation-based type checking solution.
Test if a value is a collection.
- stdlib
- stdassert
- assertion
- assert
- utilities
- utility
- utils
- util
- array
- typed array
- collection
- float64array
- float32array
- int32array
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A tiny and fast dynamic type checker/enforcer library
Checks TypeScript types match expected values
A simple and composable way to validate data in JavaScript (and TypeScript).
Type predicate functions for checking if a value is of a specific type or asserting that it is.
A tiny javascript type testing tool
A type checking library where each exported function returns either true or false and does not throw. Also added tests.
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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Test if a value is a string.
Check if something is a generator function
Returns true if a value exists, false if empty. Works with deeply nested values using object paths.
Returns `true` if the value is a primitive.
Check data type
Determine a value's type.
TypeScript and JavaScript page component object framework for Selenium
- javascript
- selenium
- automation
- test
- testing
- check
- checking
- verify
- verification
- typescript
- page
- component
- framework
- pom
The definitive collection of is* functions for runtime type checking. Lodash-compatible, tree-shakable, with types.
Detect the archive type of a Buffer/Uint8Array
Test if a value is a function.