cant't success add class to v-stage

vue : 3.x

code 
```javascript
 <v-stage
        width={window.innerWidth}
        height={window.innerHeight}
        class="mt-10"
      >
</v-stage>

```



browser shows like : 
```javascript
<div><div class="konvajs-content" role="presentation" style="position: relative; user-select: none; width: 800px; height: 400px;"><canvas width=
```
