element upload这个data额外传参怎么用

Question

我想传一个下标过去，想知道文档里的这个怎么使用

//这样子传能接到，但是response, file, fileList都拿不到了，上传成功回调都不执行了
<el-upload :on-success="handleEvaSuccess(Groupindex)">    
handleEvaSuccess(index,response, file, fileList) {
    console.log(response, file, fileList)
},

Answer 1

试试这个

:on-success="(res, file)=>handleBannerSuccess(res, file, Groupindex)"

handleBannerSuccess(response, file, index) {  
    console.log(response, file, index);   
}

Answer 2

<el-upload :data="{idx: 1}" :on-success="handleEvaSuccess(Groupindex)"> 

这个data是给服务端那边带的