<el-form :model="ruleForm" status-icon :rules="rules" ref="ruleForm" label-width="100px">
    <el-form-item label="手机号" prop="phone">
        <el-input v-model.number="ruleForm.phone"/>
    </el-form-item>
</el-form>

export default {
    data() {
      var checkPhone = (rule, value, callback) => {
        if (!value) {
          return callback(new Error('手机号不能为空'));
        } else {
          const reg = /^1[3|4|5|7|8][0-9]\d{8}$/
          console.log(reg.test(value));
          if (reg.test(value)) {
            callback();
          } else {
            return callback(new Error('请输入正确的手机号'));
          }
        }
      };
      return {
        ruleForm: {
          phone: ''
        },
        rules: {
          phone: [
            {validator: checkPhone, trigger: 'blur'}
          ]
        }
      };
    }
}