【React 小案例】的简单问题，请前辈您指点一下，谢谢^_^。

Question

通过这个网址可以访问在线编辑器：http://runjs.cn/code/vgipwvdu 链接内容如下图
问题在图中用红字标注▼

【以下代码】和【图中的】和【在线编辑器的】都是一样的代码。

Answer 1

&nbsp; &nbsp; render_one_box:function(value,i){&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; return (&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; <div className="one-box" index={i}&nbsp; key={i} >&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; <p>{value}　{i}</p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; <button onClick={this.fn_del.bind(this, i)}>删除</button>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; </div>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; )没有props传进来，fn_del的参数是undefined啊