element ui 动态增减表单项并校验

案例演示

注意！！！(这个很关键)

html部分

<el-form :model="dynamicValidateForm" ref="dynamicValidateForm" label-width="100px" class="demo-dynamic">
      <!--element ui 案例-->
      <el-form-item prop="email" label="邮箱" :rules="[
      { required: true, message: '请输入邮箱地址', trigger: 'blur' },
      { type: 'email', message: '请输入正确的邮箱地址', trigger: ['blur', 'change'] }]">
        <el-input v-model="dynamicValidateForm.email"></el-input>
      </el-form-item>
      <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-input v-model="domain.value"></el-input>
        <el-button @click.prevent="removeDomain(domain)">删除</el-button>
      </el-form-item>
      <el-form-item>
        <el-button type="primary" @click="submitForm('dynamicValidateForm')">提交</el-button>
        <el-button @click="addDomain">新增域名</el-button>
        <el-button @click="resetForm('dynamicValidateForm')">重置</el-button>
      </el-form-item>
      <!--自己的案例-->
      <el-row :gutter="20" v-for="(account, index) of dynamicValidateForm.account" :key="index">
        <el-col :span="10">
          <el-form-item class="rules" label-width="100px" label="平台账号:" :prop="'account.' + index + '.account_name'" :rules="{
      required: true, message: '平台账号不能为空', trigger: 'blur'
    }">
            <el-input type="text" placeholder="请输入" style="width: 200px" v-model="account.account_name" maxlength="50"
              show-word-limit>
            </el-input>
          </el-form-item>
        </el-col>
        <el-col :span="10">
          <el-form-item label-width="110px" class="rules" label="平台账户UID:" style="margin-left: 20px" :prop="'account.' + index + '.account_uid'" :rules="{
      required: true, message: '平台账户UID不能为空', trigger: 'blur'
    }">
            <el-input style="width: 180px" :min="0" :max="50" v-model="account.account_uid" placeholder="请输入"
              maxlength="50" show-word-limit>
            </el-input>
          </el-form-item>
        </el-col>
        <el-button type="text" style="border-radius: 2px; color: #b93947" @click="handleAdd(index)"
          v-if="dynamicValidateForm.account.length == index + 1" size="mini">
          <i class="el-icon-circle-plus-outline"></i>&nbsp;添加</el-button>
        <el-button style="margin-top: 2px" v-if="dynamicValidateForm.account.length != 1" type="text" class="deleteBox"
          @click="handleDel(index)" size="mini">
          <i class="el-icon-delete"></i>&nbsp;删除</el-button>
    </el-row>
</el-form>

js部分

export default {
    data() {
      return {
        dynamicValidateForm: {
          domains: [{
            value: ''
          }],
          email: '',
          account: [{
            account_name: "",
            account_uid: "",
          }, ],
        },
      }
    },
    methods: {
      //element ui 案例需要的方法
      submitForm(formName) {
        this.$refs[formName].validate((valid) => {
          if (valid) {
            alert('submit!');
          } else {
            console.log('error submit!!');
            return false;
          }
        });
      },
      resetForm(formName) {
        this.$refs[formName].resetFields();
      },
      removeDomain(item) {
        var index = this.dynamicValidateForm.domains.indexOf(item)
        if (index !== -1) {
          this.dynamicValidateForm.domains.splice(index, 1)
        }
      },
      addDomain() {
        this.dynamicValidateForm.domains.push({
          value: '',
          key: Date.now()
        });
      },
      //自己的 案例需要的方法
      handleAdd(index) {
        this.dynamicValidateForm.account.push({
          account_name: "",
          account_uid: "",
        });
      },
      handleDel(index) {
        this.dynamicValidateForm.account.splice(index, 1);
      }
    }
}