el-form 表单校验

<el-form ref="dataForm" :model="dataForm" :rules="rules" label-width="60px" @keyup.enter.native="dataFormSubmitHandle()">
<el-form-item prop="name" label="姓名">
    <el-input v-model="dataForm.name" placeholder="姓名" />
</el-form-item>
<el-form-item prop="email" label="邮箱">
    <el-input v-model="dataForm.email" placeholder="邮箱" />
</el-form-item>
<el-form-item label="年龄" prop="age">
    <el-input v-model.number="dataForm.age"></el-input>
</el-form-item>
<el-form-item>
    <el-button type="primary" @click="dataFormSubmitHandle()">确认</el-button>
    <el-button @click="resetForm()">重置</el-button>
</el-form-item>
</el-form>

<script>
  var checkAge = (rule, value, callback) => {
    if (!value) {
       return callback(new Error('年龄不能为空'));
     }
     if (!Number.isInteger(value)) {
         callback(new Error('请输入数字值'));
      } else {
        if (value < rule.max_age) {
          callback(new Error('必须年满18岁'));
        } else {
          callback();
        }
      }
  };
  export default {
    data() {
      return {
        dataForm: {
          name: '',
          email: '',
          age:''
        },
        rules: {
          name: [
            { required: true, message: '请输入姓名', trigger: 'blur' },
            { min: 3, max: 5, message: '长度在 3 到 5 个字符', trigger: 'blur' }
          ],
          email: [
           { 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'] }
          ],
          age: [
            {max_age：18， validator: checkAge, trigger: 'blur' }// checkAge自定义规则函数
          ]
        }
      };
    },
    methods: {
      dataFormSubmitHandle() {
        this.$refs.dataForm.validate(valid => {
        if (valid) {
            alert('submit!');
          } else {
            console.log('error submit!!')
          }
        });
      },
      resetForm() {
        this.$refs.dataForm.resetFields();
      }
    }
  }
</script>

详细的可查看element文档  https://element.eleme.cn/#/zh-CN/component/form