element的表单校验证件号规则及输入“无”的情况校验通过(示例代码)

  <el-col :span="6">
                                <el-form-item label="证件号码" prop="Idnumber" class="grid-content bg-purple">
                                        <el-input v-model="testForm.Idnumber" placeholder="请输入证件号码" @change="changeIdnumber"></el-input>
                                </el-form-item>
                     </el-col>

data(){
      let CrdtNoValidar=(rule,value,callback)=>{
               if(value&&this.testForm.idtype=="001"){
                         if(value=="无"){
                            callback();
                             return
                         }
                         let reg18=/^[1-9]\[d]{5}(18|19|([23]\d))\d{2}((0[1-9])|(10|11|12))(([0-2][1-9])|10|20|30|31)\d{3}[0-9Xx]$/;
                         let reg15=/^[1-9]\d{7}((0[1-9])|(10|11|12))(([0-2][1-9])|10|20|30|31)\d{3}$/;
                         if(reg18.test(value)||reg15.test(value)){
                            callback()
                         }else{
                            callback(new Error("请输入有效的身份证号码！"))
                         }
               }else{
                callback()
               }
         };
       return{
            rules:{
                Idnumber:[{required:false,message:'请输入证件号码',trigger:'blur'},{validator:CrdtNoValidar,trigger:'blur'}],
            },
    }
}