# @ohos.app.appstartup.StartupTask

The StartupTask module provides APIs related to startup tasks.

> **NOTE**
>
> The initial APIs of this module are supported since API version 12. Newly added APIs will be marked with a superscript to indicate their earliest API version.
>
> The APIs of this module can be used only in the stage model.

## Modules to Import

```js
import { StartupTask } from '@kit.AbilityKit';
```

## StartupTask.onDependencyCompleted

onDependencyCompleted?(dependency: string, result: ESObject): void

Called when the dependent startup task is complete.

**System capability**: SystemCapability.Ability.AppStartup

**Parameters**

| Name | Type | Mandatory | Description |
| -------- | -------- | -------- | -------- |
| dependency | string | Yes | Name of the dependent startup task. |
| result | Object | Yes | Execution result of the dependent startup task. |

**Example**

```ts
import StartupTask from '@ohos.app.appstartup.StartupTask';
import common from '@ohos.app.ability.common';
import hilog from '@ohos.hilog';

@Sendable
export default class StartupTask_001 extends StartupTask {
  constructor() {
    super();
  }
  async init(context: common.AbilityStageContext) {
    // ...
  }

  onDependencyCompleted(dependence: string, result: Object): void {
    hilog.info(0x0000, 'testTag', 'StartupTask_001 onDependencyCompleted, dependence: %{public}s, result: %{public}s',
      dependence, JSON.stringify(result));
    // ...
  }
}
```


## StartupTask.init

init(context: AbilityStageContext): Promise\<ESObject\>

Initializes this startup task.

**System capability**: SystemCapability.Ability.AppStartup

**Parameters**

| Name | Type | Mandatory | Description |
| -------- | -------- | -------- | -------- |
| context | [AbilityStageContext](js-apis-inner-application-abilityStageContext.md) | Yes | Context of the ability stage. |

**Return value**

| Type | Description |
| -------- | -------- |
| Promise\<Object | void\> | Promise used to return the execution result. |

**Example**

```ts
import { StartupTask, common } from '@kit.AbilityKit';
import { hilog } from '@kit.PerformanceAnalysisKit';

@Sendable
export default class StartupTask_001 extends StartupTask {
  constructor() {
    super();
  }
  async init(context: common.AbilityStageContext) {
    hilog.info(0x0000, 'testTag', 'StartupTask_001 init.');
    // ...
    
    return 'StartupTask_001';
  }

  onDependencyCompleted(dependence: string, result: Object): void {
    // ...
  }
}
```