1# @ohos.app.ability.common (Context) 2 3The **Common** module provides all level-2 module APIs for developers to export. 4 5> **NOTE** 6> 7> The initial APIs of this module are supported since API version 9. Newly added APIs will be marked with a superscript to indicate their earliest API version. 8> The APIs of this module can be used only in the stage model. 9 10## Modules to Import 11 12```ts 13import common from '@ohos.app.ability.common'; 14``` 15 16**System capability**: SystemCapability.Ability.AbilityBase 17 18| Name | Type | Description | 19| ----------- | -------------------- | ------------------------------------------------------------ | 20| UIAbilityContext | [UIAbilityContext](js-apis-inner-application-uiAbilityContext.md) | Level-2 module **UIAbilityContext**. | 21| AbilityStageContext | [AbilityStageContext](js-apis-inner-application-abilityStageContext.md) | Level-2 module **AbilityStageContext**.| 22| ApplicationContext | [ApplicationContext](js-apis-inner-application-applicationContext.md) | Level-2 module **ApplicationContext**.| 23| BaseContext | [BaseContext](js-apis-inner-application-baseContext.md) | Level-2 module **BaseContext**.| 24| Context | [Context](js-apis-inner-application-context.md) | Level-2 module **Context**.| 25| ExtensionContext | [ExtensionContext](js-apis-inner-application-extensionContext.md) | Level-2 module **ExtensionContext**.| 26| FormExtensionContext | [FormExtensionContext](js-apis-inner-application-formExtensionContext.md) | Level-2 module **FormExtensionContext**.| 27| ServiceExtensionContext | [ServiceExtensionContext](js-apis-inner-application-serviceExtensionContext.md) | Level-2 module **ServiceExtensionContext**.| 28| EventHub | [EventHub](js-apis-inner-application-eventHub.md) | Level-2 module **EventHub**.| 29| PacMap | [PacMap](js-apis-inner-ability-dataAbilityHelper.md#PacMap) | Level-2 module **PacMap**.| 30| AbilityResult | [AbilityResult](js-apis-inner-ability-abilityResult.md) | Level-2 module **AbilityResult**.| 31| ConnectOptions | [ConnectOptions](js-apis-inner-ability-connectOptions.md) | Level-2 module **ConnectOptions**.| 32 33**Example** 34```ts 35import common from '@ohos.app.ability.common'; 36 37let uiAbilityContext: common.UIAbilityContext; 38let abilityStageContext: common.AbilityStageContext; 39let applicationContext: common.ApplicationContext; 40let baseContext: common.BaseContext; 41let context: common.Context; 42let extensionContext: common.ExtensionContext; 43let formExtensionContext: common.FormExtensionContext; 44let eventHub: common.EventHub; 45let pacMap: common.PacMap; 46let abilityResult: common.AbilityResult; 47let connectOptions: common.ConnectOptions; 48``` 49