# app.js<a name="EN-US_TOPIC_0000001115814806"></a>

You can implement lifecycle logic specific to your application in the  **app.js**  file. Available application lifecycle functions are as follows:

-   **onCreate\(\)**: called when an application is created
-   **onDestory\(\)**: called when an application is destroyed

In the following example, logs are printed only in the lifecycle functions .

```
// app.js
export default {
  onCreate() {
    console.info('Application onCreate');
  },
  onDestroy() {
    console.info('Application onDestroy');
  },
}
```