1# StartOptions 2 3>  **NOTE** 4> 5> The initial APIs of this module are supported since API version 9. The APIs of API version 9 is of the Canary version and are for trial use only. The API call may be unstable. 6 7 8**StartOptions** is the basic communication component of the system. 9 10 11## Modules to Import 12 13 14``` 15import StartOptions from '@ohos.application.StartOptions'; 16``` 17 18## Attributes 19 20**System capability**: SystemCapability.Ability.AbilityRuntime.AbilityCore 21 22| Name| Readable| Writable| Type| Mandatory| Description| 23| -------- | -------- | -------- | -------- | -------- | -------- | 24| windowMode | Yes| No| number | No| Window mode.| 25| displayId | Yes| No| number | No| Display ID.| 26 27
