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isPromise - util/types - Node documentation
function isPromise

Usage in Deno

import { isPromise } from "node:util/types";
isPromise(object: unknown): object is Promise<unknown>

Returns true if the value is a built-in Promise.

util.types.isPromise(Promise.resolve(42));  // Returns true

Parameters

object: unknown

Return Type

object is Promise<unknown>