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                            ## BackTop 返回頂部
當頁面內容冗長，需要快捷返回頂部時使用，一般放置在頁面右下角位置。
![](https://img.kancloud.cn/ff/09/ff09b5c4709eb973501b84076aac54a6_1887x140.png)

### 代碼示例
```html
<cvu-back-top></cvu-back-top>
```
### props
| 屬性 | 說明 | 類型 | 默認值 |
| --- | --- | --- | --- |
| height | 頁面滾動高度達到該值時才顯示`BackTop`組件 | Number | 400 |
| bottom | 組件距離底部的距離 | Number | 30 |
| right | 組件距離右部的距離 | Number | 30 |
| duration | 滾動動畫持續時間，單位 毫秒 | Number | 1000 |

### events
| 事件名 | 說明 | 返回值 |
| --- | --- | --- |
| on-click | 點擊按鈕時觸發 | 無 |
                    
                
        
                
            
        
                
    
                
    
                
        
                
    
                

                







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