Similar to this kind of addition, two input boxes are added at a time. But I don't know how to write it. I don't know if a big man has ever met such a scene. Or there is a better solution, please provide.
You can put validation rules in El form item. Similar to: elementui form dynamically increases or decreases form items
<el-form-item
v-for="(domain, index) in dynamicValidateForm.domains"
:label="'域名' + index"
:key="domain.key"
:prop="'domains.' + index + '.value'"
:rules="{ required: true, message: '域名不能为空', trigger: 'blur' }"
>
....
</el-form-item>
You can also click DEMO on the lower right corner of the online operation to debug in CodePen.