1# @ohos.app.ability.wantConstant (wantConstant) 2 3The **wantConstant** module provides the actions, entities, and flags used in **Want** objects. 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 9## Modules to Import 10 11```ts 12import wantConstant from '@ohos.app.ability.wantConstant'; 13``` 14 15## wantConstant.Params 16 17Defines **Params** (specifying the action that can be performed) in the Want. 18 19**System capability**: SystemCapability.Ability.AbilityBase 20 21| Name | Value | Description | 22| ----------------------- | ---------------------------------- | ------------------------------------------------------------------------------ | 23| DLP_PARAMS_SANDBOX | ohos.dlp.params.sandbox | Action of obtaining the sandbox flag.<br>**System API**: This is a system API and cannot be called by third-party applications.| 24| DLP_PARAMS_BUNDLE_NAME | ohos.dlp.params.bundleName | Action of obtaining the DLP bundle name.<br>**System API**: This is a system API and cannot be called by third-party applications.| 25| DLP_PARAMS_MODULE_NAME | ohos.dlp.params.moduleName | Action of obtaining the DLP module name.<br>**System API**: This is a system API and cannot be called by third-party applications.| 26| DLP_PARAMS_ABILITY_NAME | ohos.dlp.params.abilityName | Action of obtaining the DLP ability name.<br>**System API**: This is a system API and cannot be called by third-party applications.| 27| DLP_PARAMS_INDEX | ohos.dlp.params.index | Action of obtaining the DLP index.<br>**System API**: This is a system API and cannot be called by third-party applications.| 28| ABILITY_BACK_TO_OTHER_MISSION_STACK | ability.params.backToOtherMissionStack | Whether to support redirection back across mission stacks. | 29| ABILITY_RECOVERY_RESTART<sup>10+</sup> | ohos.ability.params.abilityRecoveryRestart | Action of recovering an ability from a fault and restarting it.| 30| CONTENT_TITLE_KEY<sup>10+</sup> | ohos.extra.param.key.contentTitle | Action of sharing the content title. | 31| SHARE_ABSTRACT_KEY<sup>10+</sup> | ohos.extra.param.key.shareAbstract | Action of sharing the abstract. | 32| SHARE_URL_KEY<sup>10+</sup> | ohos.extra.param.key.shareUrl | Action of sharing the URL. | 33| SUPPORT_CONTINUE_PAGE_STACK_KEY<sup>10+</sup> | ohos.extra.param.key.supportContinuePageStack | Whether to migrate page stack information during cross-device migration. The default value is **true**, indicating that page stack information is automatically migrated.| 34| SUPPORT_CONTINUE_SOURCE_EXIT_KEY<sup>10+</sup> | ohos.extra.param.key.supportContinueSourceExit | Whether to exit the application on the source device during cross-device migration. The default value is **true**, indicating that the application on the source device automatically exits.| 35 36 37## wantConstant.Flags 38 39 Enumerates the flags that specify how the Want will be handled. 40 41**System capability**: SystemCapability.Ability.AbilityBase 42 43| Name | Value | Description | 44| ------------------------------------ | ---------- | ------------------------------------------------------------ | 45| FLAG_AUTH_READ_URI_PERMISSION | 0x00000001 | Indicates the permission to read the URI. | 46| FLAG_AUTH_WRITE_URI_PERMISSION | 0x00000002 | Indicates the permission to write data to the URI. | 47| FLAG_AUTH_PERSISTABLE_URI_PERMISSION<sup>10+</sup> | 0x00000040 | Indicates the permanent permission of the URI. This flag is valid only for PC applications.<br>**System API**: This is a system API and cannot be called by third-party applications.<br>If this flag is used together with **FLAG_AUTH_READ_URI_PERMISSION**, the permanent read permission is granted.<br>If this flag is used together with **FLAG_AUTH_WRITE_URI_PERMISSION**, the permanent write permission is granted.<br>The flag takes effect only when the **PERMISSION_PROXY_AUTHORIZATION_URI** permission is configured for the application.| 48| FLAG_INSTALL_ON_DEMAND | 0x00000800 | Indicates that the specific ability will be installed if it has not been installed. | 49