Vue关于Element-ui中Form表单验证

案例如下：

<el-form :model="ruleForm" :rules="rules" ref="ruleForm" label-width="100px" class="demo-ruleForm">
  <el-form-item label="活动名称" prop="name">
    <el-input v-model="ruleForm.name"></el-input>
  </el-form-item>
  <el-form-item prop="password">
       <el-input type="password" v-model="ruleForm.password" placeholder="请输入密码"></el-input>
   </el-form-item>
  <el-form-item>
    <el-button type="primary" @click="submitForm('ruleForm')">立即创建</el-button>
    <el-button @click="resetForm('ruleForm')">重置</el-button>
  </el-form-item>
</el-form>

    data() {
      var validatePass = (rule, value, callback) => {
          if (!value) {
              return callback(new Error('请输入密码'));
          }else {
              callback(); //重点在这 如果在验证通过后不添加callback()函数在验证时是条件会为false
          }
      };
      return {
        ruleForm: {
          name: '',
          password: '',
        },
        rules: {
          name: [
            { required: true, message: '请输入活动名称', trigger: 'blur' },
            { min: 3, max: 5, message: '长度在 3 到 5 个字符', trigger: 'blur' }
          ],
          password: [ { validator: validatePass, trigger: 'blur' } ]
        }
      };
    },
    methods: {
      submitForm(formName) {
        this.$refs[formName].validate((valid) => {
          if (valid) {	//在验证通过时时不返回callback()时 这一步进不来
            alert('submit!');
          } else {
            console.log('error submit!!');
            return false;
          }
        });
      },
      resetForm(formName) {
        this.$refs[formName].resetFields();
      }
    }

1. el-form 中添加：rules属性，：model属性，ref属性，并且中添加prop属性，对应rules中的规则
2. rules规则使用语法：{ validator：验证方法，trigger：验证触发 }

相关参考链接：https://blog.csdn.net/qq_27263045/article/details/82797176