<el-upload
                    class="upload-demo"
                    :action="uploadUrl"
                    :on-change="(file =>{
                      return fileChange(file,scope.row,'company');
                    })"
                    :before-remove="beforeRemove"
                    :auto-upload="false"
                    :limit="1"
                    :on-exceed="handleExceed"
                    :file-list="fileList"
                >

on-change官网是

 通过重写自定义参数