0.1.6 • Published 2 years ago
@js-utilities/typecheck v0.1.6
Type checking library
A set of super-simple type checkers. Each checker returns boolean value. Most checkers are typescript type predicates.
Installation
npm i -S @js-utilities/typecheckUsage example
import { isCallable } from "@js-utilities/typecheck";
const a: unknown = global.value;
if (isCallable(a)) a();Available checkers:
| Checker | Return type |
|---|---|
isCallable | boolean |
isFunction | value is Function |
isArrowFunction | boolean |
isArray<T> | value is T[] |
isObject<T> | value is T |
isBoolean | value is boolean |
isUndefined | value is undefined |
isNumber | value is number |
isString | value is string |
isSymbol | value is symbol |
isNull | value is null |
isMap<T, U> | value is Map<T, U> |
isSet<T> | value is Set<T> |
isWeakSet<T> | value is WeakSet<T> |
isWeakMap<T, U> | value is WeakMap<T, U> |
isPromise<T> | value is Promise<T> |