vue elementUI form组件动态添加el-form-item并且动态添加rules必填项校验方法

先看一下效果图（想在表单里动态的增删 form-item，然后添加rules，校验其必填项；

）:

html部分

<div v-for="(item, index) in form.labels" :key="index" class="label">
    <el-form-item label="名称:"
    :prop="'labels.' + index + '.name'"
    :rules="{
          required: true, message: '请输入', trigger: 'blur'
    }"
    class="middleInput">
      <el-input v-model.trim="item.name" maxlength="30" placeholder="请输入"></el-input>
      <i class="el-icon-circle-plus-outline icon" v-if="(index === (form.labels.length - 1))" @click.prevent="addKey(item)"></i>
      <i class="el-icon-remove-outline icon" v-if="(form.labels.length > 1)" @click.prevent="removeKey(item, index)"></i>
    </el-form-item>
    <el-form-item label="值:"
    :prop="'labels.' + index + '.value'"
    :rules="{
          required: true, message: '请输入', trigger: 'blur'
    }"
    class="middleInput">
      <el-input maxlength="100" show-word-limit type="textarea" :rows="3" v-model.trim="item.value" placeholder="请输入"></el-input>
    </el-form-item>
 </div>

js

//data:
form: {
    labels: [{
    	name: '',
    	value: ''
    }]
},

// methods:
addKey (item) {
  this.form.labels.push({
    name: '',
    value: ''
  })
},
removeKey (item, index) {
  this.form.labels.splice(index, 1)
},

注意

核心代码：

:prop="'labels.' + index + '.name'"
:rules="{
       required: true, message: '请输入', trigger: 'blur'
 }"

• prop里的值有格式要求，以本demo为例：“表单属性数组key名 + ‘.’ + 索引值 + ‘.’ + 数组里对象的key名”；
• rules里填写校验不成功触发条件和提示语；