vue常见问题解决办法（二）|warning：component lists rendered with v-for should have explicit keys

命令行warning(Emitted value instead of an instance of Error)。component lists rendered with v-for should have explicit keys。See https://vuejs.org/guide/list.html#key for more info.

截图如下：



这里只是推荐使用key.

原本的代码如下：

<el-tag
v-for = "feiLei of ruleForm.fenLeis"
:closable = "true"
type = "primary"
@close = "handleCloseFenLei(feiLei)">{{feiLei.name}}
</el-tag>

运行时显示warning，添加：key即可，如下：

<el-tag
v-for = "feiLei of ruleForm.fenLeis"
:key="feiLei1"
:closable = "true"
type = "primary"
@close = "handleCloseFenLei(feiLei)">{{feiLei.name}}
</el-tag>

这样就不会报错啦，具体看文档，key不是必须的，仅仅是warning