```html
<div id="app">
<input type="checkbox" v-model='arr' name="" id="" value="aa">aa
<input type="checkbox" v-model='arr' name="" id="" value="bb">bb
<input type="checkbox" v-model='arr' name="" id="" value="cc">cc
<input type="checkbox" v-model='arr' name="" id="" value="dd">dd
{{arr}}
</div>
```
```javascript
new Vue({
el: '#app',
data: {
arr: []
}
})
```
- 效果
