---
metadata:
  - name: generator
    content: Diplodoc Platform v5.39.1
alternate:
  - https://yandex.com/dev/jsapi-v2-1/doc/en/v2-1/ref/reference/IPromiseProvider.md
  - https://yandex.com/dev/jsapi-v2-1/doc/ru/v2-1/ref/reference/IPromiseProvider.md
---
> **Documentation Index:** Fetch the complete configuration index at https://yandex.com/dev/jsapi-v2-1/doc/en/llms.txt

# IPromiseProvider


Object fulfilling the promise.

[Constructor](#constructor-summary) | [Methods](#methods-summary)

## Constructor {#constructor-summary}

```javascript
IPromiseProvider()
```

## Methods {#methods-summary}

#|
|| **Name** | **Returns** | **Description** ||
|| [then](https://yandex.com/dev/jsapi-v2-1/doc/en/v2-1/ref/reference/IPromiseProvider.md#then)([onResolve](https://yandex.com/dev/jsapi-v2-1/doc/en/v2-1/ref/reference/IPromiseProvider.md#then-param-onResolve), [onReject](https://yandex.com/dev/jsapi-v2-1/doc/en/v2-1/ref/reference/IPromiseProvider.md#then-param-onReject)) | [IPromiseProvider](https://yandex.com/dev/jsapi-v2-1/doc/en/v2-1/ref/reference/IPromiseProvider.md) | Returns a self-reference or a new Promise object.||
|#

## Methods details {#method_detail}

### then {#then}

```javascript
{IPromiseProvider} then(onResolve, onReject)
```

**Returns** a self-reference or a new Promise object.

**Parameters:**

#|
|| **Parameter** | **Default value** | **Description**  ||
|| [`onResolve`](#then-param-onResolve)[*](*star) | — | Type: Function

Handler function that is called if the promise was fulfilled. ||
|| [`onReject`](#then-param-onReject)[*](*star) | — | Type: Function

Handler function that is called if the promise was not fulfilled (an error occurred). ||
|#

\* Mandatory parameter/option.

[*star]: Mandatory parameter/option.