React antd Upload限制上传类型

<Upload
     name="file"
     className="uploader"
     listType="picture-card"
     showUploadList={false}
     accept=".xls, .xlsx"
     beforeUpload={this.beforeUpload.bind(this)}>

可以直接利用后缀名限制，如下

# 仅能上传execl 文件
accept=".xls, .xlsx"

# 仅能上传图片文件
accept="image/*"

其他类型请参考文档：
https://developer.mozilla.org/en-US/docs/Web/HTML/Element/input/file#accept