isPromise#

Check if the given value is a Promise.

Usage Scenarios#

• Async Handling: Verify if a value is a Promise before using await or .then().
• API Response Handling: Check if API returns a Promise before chaining operations.
• Error Prevention: Avoid runtime errors by checking Promise type.

Examples#

import { isPromise } from 'funtool';

isPromise(Promise.resolve()); // ✅ true
isPromise(new Promise(() => {})); // ✅ true
isPromise({}); // ❌ false
isPromise('promise'); // ❌ false

Signature#

function isPromise(v: any): boolean

Parameters#

• v (any): The value to test if it is a Promise.

Returns#

• (boolean): Returns true if the value is a Promise, otherwise returns false.