isPromise ​
Checks if a given value is Promise.
This function can also serve as a type predicate in TypeScript, narrowing the type of the argument to Promise.
Signature ​
typescript
function isPromise(value: unknown): value is Promise<any>;Parameters ​
value(unknown): The value to check if it is aPromise.
Returns ​
(value is Promise<any>): Returns true if value is a Promise, else false.
Examples ​
typescript
const value1 = new Promise(resolve => resolve());
const value2 = {};
const value3 = 123;
console.log(isPromise(value1)); // true
console.log(isPromise(value2)); // false
console.log(isPromise(value3)); // false