# MissionListener

The **MissionListener** module defines the listeners used to observe the mission status. The listeners can be registered by using [registerMissionListener](js-apis-application-missionManager.md#missionmanagerregistermissionlistener).

**System capability**: SystemCapability.Ability.AbilityRuntime.Mission

| Name       | Type                | Mandatory| Description                                                        |
| ----------- | -------- | ---- | ------------------------------------------------------------ |
| onMissionCreated    | function               | No  | Called when the system creates a mission.                               |
| onMissionDestroyed   | function               | No  | Called when the system destroys the mission.|
| onMissionSnapshotChanged   | function               | No  | Called when the system updates the mission snapshot.|
| onMissionMovedToFront   | function               | No  | Called when the system moves the mission to the foreground.|
| onMissionLabelUpdated   | function               | No  | Called when the system updates the mission label.|
| onMissionIconUpdated   | function               | No  | Called when the system updates the mission icon.|
| onMissionClosed   | function               | No  | Called when the system closes the mission.|

**Example**
```ts
import missionManager from '@ohos.application.missionManager';

let listener = {
    onMissionCreated: function (mission) {
        console.log('onMissionCreated mission: ' + JSON.stringify(mission));
    },
    onMissionDestroyed: function (mission) {
        console.log('onMissionDestroyed mission: ' + JSON.stringify(mission));
    },
    onMissionSnapshotChanged: function (mission) {
        console.log('onMissionSnapshotChanged mission: ' + JSON.stringify(mission));
    },
    onMissionMovedToFront: function (mission) {
        console.log('onMissionMovedToFront mission: ' + JSON.stringify(mission));
    },
    onMissionLabelUpdated: function (mission) {
        console.log('onMissionLabelUpdated mission: ' + JSON.stringify(mission));
    },
    onMissionIconUpdated: function (mission, icon) {
        console.log('onMissionIconUpdated mission: ' + JSON.stringify(mission));
        console.log('onMissionIconUpdated icon: ' + JSON.stringify(icon));
    },
    onMissionClosed: function (mission) {
        console.log('onMissionClosed mission: ' + JSON.stringify(mission));
    }
};
let listenerid = missionManager.registerMissionListener(listener);
```