1# @ohos.app.ability.StartOptions (StartOptions) 2 3**StartOptions** is used as an input parameter of [startAbility()](js-apis-inner-application-uiAbilityContext.md#uiabilitycontextstartability-1) to specify the window mode of an ability. 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 StartOptions from '@ohos.app.ability.StartOptions'; 14``` 15 16## Attributes 17 18**System capability**: SystemCapability.Ability.AbilityRuntime.Core 19 20| Name| Type| Mandatory| Description| 21| -------- | -------- | -------- | -------- | 22| [windowMode](js-apis-app-ability-abilityConstant.md#abilityconstantwindowmode) | number | No| Window mode.<br>**System API**: This is a system API and cannot be called by third-party applications.| 23| displayId | number | No| Display ID. The default value is **0**, indicating the current display.| 24 25**Example** 26 27 ```ts 28 import missionManager from '@ohos.app.ability.missionManager'; 29 import StartOptions from '@ohos.app.ability.StartOptions'; 30 import { BusinessError } from '@ohos.base'; 31 32 try { 33 missionManager.getMissionInfos('', 10, (error, missions) => { 34 if (error) { 35 console.error(`getMissionInfos failed, error.code: ${JSON.stringify(error.code)}, error.message: ${JSON.stringify(error.message)}`); 36 return; 37 } 38 console.log(`size = ${missions.length}`); 39 console.log(`missions = ${JSON.stringify(missions)}`); 40 let id = missions[0].missionId; 41 42 let startOptions: StartOptions = { 43 windowMode : 101, 44 displayId: 0 45 }; 46 missionManager.moveMissionToFront(id, startOptions).then(() => { 47 console.log('moveMissionToFront is called'); 48 }); 49 }); 50 } catch (paramError) { 51 let code = (paramError as BusinessError).code; 52 let message = (paramError as BusinessError).message; 53 console.error(`error: ${code}, ${message}`); 54 } 55 ``` 56