isInstanceOf | /is.ts | unknownutil@v3.1.0

🦕 A lightweight utility pack for handling unknown type

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function isInstanceOf

import { isInstanceOf } from "https://deno.land/x/unknownutil@v3.1.0/is.ts";

isInstanceOf<T extends new (...args: any) => unknown>(ctor: T): Predicate<InstanceType<T>>

Return true if the type of x is instance of ctor.

import is from "./is.ts";

const a: unknown = new Date();
if (is.InstanceOf(Date)(a)) {
  // a is narrowed to Date
  const _: Date = a;
}

Type Parameters

T extends new (...args: any) => unknown

ctor: T

Predicate<InstanceType<T>>