Function isPromise

Determines if an element is a Promise object.

Remarks

Function used to check if an element is a Promise<U> object by validating that it is an object that contains a thenable function and is an instance of Promise.

Example

isPromise(1) // false
isPromise(Promise.resolve(1)) // true
isPromise({ then: () => {} }) // false
isPromise({ then: 1 }) // false

Returns

true if element is a Promise<U> object