element ui el-form-item动态渲染添加验证

这是一个关于Vue.js的示例，展示了如何在表单中动态添加和删除输入字段，并实现表单验证。使用了Element UI库，通过v-for指令遍历列表并为每个项设置输入框和删除按钮。当点击添加按钮时，会向列表中添加新的输入项；点击删除按钮则移除相应项。同时，表单包含了一个备选项和提交按钮，用于提交表单数据。

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<template>
  <div class="radio">
    <el-form :model="formline" ref="formline" :rules="rules">
      <div v-for="(item, index) in formline.lists" :key="index">
        <el-form-item
          label="选项A"
          :rules="[{required: true, message: '请输入', trigger: 'blur'}]"
          :prop="'lists.' + index +'.name'"
        >
          <el-input v-model="item.name"></el-input>
          <el-button
            type="danger"
            @click="deleteTool(item.index, formline.lists)">
            <i class="el-icon-remove-outline"></i>
          </el-button>
          <el-radio v-model="radio" label="1">备选项</el-radio>
          <el-button type="primary" @click="addTool(formline.lists)">添加</el-button>
        </el-form-item>
      </div>
      <el-form-item>
        <el-button type="primary" @click="submitForm('formline')">立即创建</el-button>
      </el-form-item>
    </el-form>
  </div>
</template>
<script>
export default {
  data() {
    return {
      radio: '',
      formline: {
        lists:[
          {
            index: 0,
            name: '',
          }
        ],
      },
      rules:{
        name:[{required: true, message: '请输入', trigger: 'blur' }],
      },
    };
  },
  methods: {
    submitForm(formName) {
      this.$refs[formName].validate((valid) => {
        if (valid) {
          alert('submit!');
        } else {
          console.log('error submit!!');
          return false;
        }
      });
    },
    addTool(arr){
      arr.push({
        index: arr.length,
        step:'',
        step_pic:''
      })
      this.formline.lists = this.formline.lists;
    },
    deleteTool(index, arr){
      arr.splice(index, 1)
      for (let i in arr) {
        arr[i].index = i
      }
    }
  }
}
</script>