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4664 packages found
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 simple and composable way to validate data in JavaScript (and TypeScript).
A set of types, type checks, and type guards for simpler, safer, and easier to read code.
Check if a string is SVG
Check if a path is a file, directory, or symlink
Type predicate functions for checking if a value is of a specific type or asserting that it is.
Checks TypeScript types match expected values
A type checking library where each exported function returns either true or false and does not throw. Also added tests.
Easily check the structure of any javascript object!
A tiny javascript type testing tool
A vanilla JavaScript library for checking the type of variables in a more robust and accurate way than the typeof operator
- vanilla javascript
- types
- type
- type checking
- type checking library
- type checking module
- true type checking
- typeof
- typeof library
- typeof module
- typeof checking
- typeOf
- isString
- isNumber
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A simple utility to Check the value is number or can convert to a number, for example string ' 123 ' can be converted to 123.
Returns `true` if the value is a primitive.
Type checking utils.
Returns true if a value exists, false if empty. Works with deeply nested values using object paths.
Test if a value is a string.
Check if a Buffer/Uint8Array is a GZIP file
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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