type-core

type-core

A types utility belt for TypeScript.

Install

npm install type-core

Types

• Primitives
  • ID
  • NonDefined
  • Nullish
  • Empty
  • FalseLike
  • Primitive
• Serial
  • Serial.Type
  • Serial.Primitive
  • Serial.Array
  • Serial.Object
• Structural
  • Dictionary
  • Constructor
  • MaybePromise
  • MaybePromiseLike
• Functions
  • NullaryFn
  • UnaryFn
  • BinaryFn
  • MultiaryFn
  • VariadicFn
• Utils
  • Union
  • Intersection
  • KeyOf
  • ValueOf
  • Index
  • Replace
  • Optional
  • Deep.Required
  • Deep.Partial

Utilities

TypeGuard

See source.

An exported object with methods:

• isID(item: any): item is ID
• isNullish(item: any): item is Nullish
• isEmpty(item: any): item is Empty
• isFalseLike(item: any): item is FalseLike
• isPrimitive(item: any): item is Primitive: includes bigint, boolean, number, string, symbol, null, and undefined.
• isNull(item: any): item is null
• isUndefined(item: any): item is undefined
• isBoolean(item: any): item is boolean
• isString(item: any): item is string
• isNumber(item: any): item is number
• isBigInt(item: any): item is bigint
• isSymbol(item: any): item is symbol
• isFunction(item: any): item is VariadicFn
• isObjectLike(item: any): item is any: excludes null, includes array and function.
• isObject(item: any): item is any: excludes null, includes array.
• isRecordLike(item: any): item is Members<unknown>, excludes null and array, includes function.
• isRecord(item: any): item is Members<unknown>: excludes null, array, and function.
• isArray(item: any): item is unknown[]
• isPromiseLike(item: any): item is PromiseLike<unknown>: item is a thenable.
• isPromise(item: any): item is Promise<unknown>: item is a Promise.
• isIterable(item: any): item is Iterable<unknown>
• isAsyncIterable(item: any): item is AsyncIterable<unknown>
• isIterator(item: any): item is Iterator<unknown, unknown, unknown>
• isEventEmitterLike(item: any): item is Partial<NodeJS.EventEmitter>
• isEventEmitter(item: any): item is NodeJS.EventEmitter
• isEventTarget(item: any): item is EventTarget