关于element-ui表单验证（自定义验证规则）

 <el-form
            :model="ruleForm"
            :rules="rules"
            ref="ruleForm"
            label-width="100px"
            labelPosition="top"
            :inline="true"
            class="demo-ruleForm"
          >
            <el-row :gutter="">
              <el-col :span="">
                <el-form-item :label="$t('joinUs.surname')" prop="surname">
                  <el-input class="edit-input" v-model="ruleForm.surname"></el-input>
                </el-form-item>
              </el-col>
              <el-col :span="">
                <el-form-item :label="$t('joinUs.givenName')" prop="givenName">
                  <el-input class="edit-input" v-model="ruleForm.givenName"></el-input>
                </el-form-item>
              </el-col>
            </el-row>            <el-row :gutter="">
              <el-col :span="">
                <el-form-item :label="$t('joinUs.email')" prop="email">
                  <el-input class="edit-input" v-model="ruleForm.email"></el-input>
                </el-form-item>
              </el-col>
              <el-col :span="">
                <el-form-item :label="$t('joinUs.phone')" prop="phoneNumber" required>
                  <el-row class="edit-tel">
                    <el-col :span="">
                      <el-input class="edit-tel1" v-model="phone1"></el-input>
                    </el-col>
                    <el-col class="line" :span="">—</el-col>
                    <el-col :span="">
                      <el-input class="edit-tel2" v-model="phone2"></el-input>
                    </el-col>
                  </el-row>
                </el-form-item>
              </el-col>
            </el-row>
          </el-form>

需求：
必填：

surname  givenName  email  phoneNumber

正则：

surname  只允许输入英文

givenName  只允许输入中文

phoneNumber  只允许输入1-20个数字，

email  邮箱

data () {
    return {
      ruleForm: {
        surname: "",
        givenName: "",
        email: "",
        phoneNumber: ""
      }
      phone1: "",
      phone2: ""
   }
}    

由于国际化问题，切换时在 data 中不起作用，需要将表达式放到 computed 属性中

computed: {
    rules () {
      var validateSurnmae = (rule, value, callback) => {
        let reg = /^[A-Za-z]+$/
        if (!reg.test(value)) {
          callback(new Error(this.$t('joinUs.surnameErr3')))
        } else {
          callback()
        }
      };
      var validateGivenName = (rule, value, callback) => {
        let reg = /^[\u4e00-\u9fa5]+$/
        if (!reg.test(value)) {
          callback(new Error(this.$t('joinUs.givenNameErr3')))
        } else {
          callback()
        }
      };return {
        surname: [
          { required: true, message: this.$t('joinUs.surnameErr1'), trigger: "blur" },
          { validator: validateSurnmae, trigger: "blur" },
          { min: , max: 2, message: this.$t('joinUs.surnameErr2'), trigger: "blur" }
        ],
        givenName: [
          { required: true, message: this.$t('joinUs.givenNameErr1'), trigger: "blur" },
          { validator: validateGivenName, trigger: "blur" },
          { min: , max: 2, message: this.$t('joinUs.givenNameErr2'), trigger: "blur" }
        ]
        email: [
          { required: true, message: this.$t('joinUs.emailError'), trigger: "blur" },
          {
            type: "email",
            message: this.$t('joinUs.emailError'),
            trigger: ["blur", "change"]
          }
        ],
        phoneNumber: [
          { required: true, message: this.$t('joinUs.phoneNumberError1'), trigger: "blur" },
          { type: 'number', message: this.$t('joinUs.phoneNumberError2'), trigger: "blur" }
        ]
      }
    }
  }

因为项目需要，现在的 tel 电话 是加区号的

所以写成了上面那种形式，

两个框的单独的，然后用watch监听输入框，把两个框的内容拼接

watch: {
    'phone1': function (val) {
      this.ruleForm.phoneNumber = parseInt(val + this.phone2)
    },
    'phone2': function (val) {
      this.ruleForm.phoneNumber = parseInt(this.phone1 + val)
    }
  },

这样就得到了总的电话号码。然后去给总的号码添加校验规则

OK！