1e41f4b71Sopenharmony_ci# @ohos.app.ability.ExtensionAbility (扩展能力基类) 2e41f4b71Sopenharmony_ci 3e41f4b71Sopenharmony_ciExtensionAbility是特定场景扩展能力的基类，继承自[Ability](js-apis-app-ability-ability.md)，未新增属性和方法。不支持开发者直接继承该基类。各类Ability的继承关系详见[继承关系说明](./js-apis-app-ability-ability.md#ability的继承关系说明)。 4e41f4b71Sopenharmony_ci 5e41f4b71Sopenharmony_ci> **说明：** 6e41f4b71Sopenharmony_ci> 7e41f4b71Sopenharmony_ci> 本模块首批接口从API version 9 开始支持。后续版本的新增接口，采用上角标单独标记接口的起始版本。 8e41f4b71Sopenharmony_ci> 9e41f4b71Sopenharmony_ci> 本模块接口仅可在Stage模型下使用。 10e41f4b71Sopenharmony_ci 11e41f4b71Sopenharmony_ci## 导入模块 12e41f4b71Sopenharmony_ci 13e41f4b71Sopenharmony_ci```ts 14e41f4b71Sopenharmony_ciimport { ExtensionAbility } from '@kit.AbilityKit'; 15e41f4b71Sopenharmony_ci``` 16e41f4b71Sopenharmony_ci 17e41f4b71Sopenharmony_ci**原子化服务API：** 从API version 11开始，该接口支持在原子化服务中使用。 18e41f4b71Sopenharmony_ci 19e41f4b71Sopenharmony_ci**系统能力**：SystemCapability.Ability.AbilityRuntime.AbilityCore