---
tags: brew-js
---
# Element initialization
## Methods
### `app.matchElement`
Same as registering listener on `mounted` event but filtered by selector.
```typescript
app.matchElement(selector, callback): void
```
## Events
### `mounted` event
| Bubbles | Handlable |
| ------- | --------- |
| No | No |
Performs initialization when the element is first rendered.
```typescript
app.on('mounted', callback): void
app.on(elementOrSelector, 'mounted', callback): void
```