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                            在表頭添加一個圖標，效果圖：
![](https://img.kancloud.cn/09/81/0981638abe328c1bd40b826026ec15da_646x209.png)
問題：    1.使用render-header渲染表頭，控制臺會出現警告：**使用scoped-slot比用render-header更簡單**

~~~
警告內容：
[Element Warn][TableColumn]Comparing to render-header, scoped-slot header is easier to use. We recommend users to use scoped-slot header
~~~
```
<el-table-column  label="操作" :render-header="renderHeaderCaseBody"></el-table-column>
```

解決方法：使用插槽：slot="header"
```
<template slot="header">
  數量
  <el-tooltip effect="dark" content="數量必填" placement="top-start">
    <i
      class="el-icon-warning"
      style="color: #f5222d; margin-left: 5px"
    ></i>
  </el-tooltip>
</template>
```


                    
                
        
                
            
        
                
    
                
    
                
        
                
    
                

                







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