vue深度监听之手机格式344

需求是让输入框输入手机号让他显示344的格式

 

 如果手机号输入框绑定的是直接一个属性的话可以使用watch直接监听，但是需求是放在一个对象里面（因为要点击提交的时候进行输入框验证），所以现在需要监听的就是对象的一个属性，需要使用watch的深度监听

放上代码

<template>
  <div>
    <div class="binding_main_nav">
      <div class="binding_main_nav_div" @click="bindingemailfn">
        <div class="binding_main_nav_div_noselection"></div>
        <span>绑定邮箱</span>
      </div>
      <div class="binding_main_nav_div">
        <div class="binding_main_nav_div_selection"></div>
        <span>绑定手机</span>
      </div>
      <div class="binding_main_nav_div" @click="bindingpasswordfn">
        <div class="binding_main_nav_div_noselection"></div>
        <span>修改密码</span>
      </div>
    </div>
    <div class="binding_main_body">
      <div class="binding_main_body_msg">
        <span>点击“获取验证码”接收验证码，并完成验证</span>
      </div>
      <div class="binding_main_body_form">
        <el-form class="bindingphone-form" :rules="bindingphonemsg" :model="binding" ref="binding">
          <el-form-item prop="bindingphone">
            <span class="bindingphoneImg">
              <img src="@/assets/img/binding/shouji.png" />
            </span>
            <el-input placeholder="请输入手机号" type="text" tabindex="1" v-model="binding.telephone"  maxlength="13"/>
          </el-form-item>

          <el-form-item prop="bindingphoneverifica" class="bindingphoneverifica">
            <span class="bindingphoneImg">
              <img src="@/assets/img/login/loginyanzhengma.png" />
            </span>
            <el-input
              placeholder="请输入验证码"
              v-model="binding.verifica"
              onkeyup="this.value=this.value.replace(/[^d.]/g,'');"
              type="text"
              tabindex="2"
              maxlength="6"
            />
          </el-form-item>
          <el-button class="bindingphone_form_btn" type="primary">获取验证码</el-button>
        </el-form>
        <el-button type="primary" class="bindingphoneverificabtn">确定</el-button>
      </div>
    </div>
  </div>
</template>

<script>
  import { validEmail, validPhone } from "@/components/login/validate";
  import config from "@/config";
export default {
  data() {
    var checkvalidate = (rule, value, callback) => {
      if (this.binding.verifica == "") {
        callback(new Error("不能为空且只能为数字"));
      }
      if (this.binding.verifica.length < 6) {
        callback(new Error("长度不能小于六位"));
      } else {
        callback();
      }
    };
    var checkUserName = (rule, value, callback) => {
      if (this.binding.telephone == "" || !this.binding.telephone.trim()) {
        callback(new Error("手机号不能为空"));
      }
      if (!validPhone(this.binding.telephone)) {
        callback(new Error("请输入正确的手机号格式"));
      } else {
        callback();
      }
    };
    return {
      binding:{
        telephone : "",
        verifica: "",
      },
      bindingphonemsg: {
        bindingphone: [
          { required: true, validator: checkUserName, trigger: "blur" }
        ],
        bindingphoneverifica: [
           { required: true, validator: checkvalidate, trigger: "blur" }
        ]
      }
    }
  },
  methods:{
        bindingemailfn(){
            this.$router.push('/bindingmodifica/email')
        },
        bindingpasswordfn(){
            this.$router.push('/bindingmodifica/newpassword')
        },
  },

  watch:{
    'binding.telephone':{
        deep:true,
        handler:function(newValue,oldValue){
          
           if (newValue > oldValue) {
            if (newValue.length === 4 || newValue.length === 9) {
              var pre = newValue.substring(0, newValue.length - 1);
              var last = newValue.substr(newValue.length - 1, 1);
              this.binding.telephone = pre + ' ' + last;
            } else {
              this.binding.telephone = newValue;
            }
          } else {
            if (newValue.length === 9 || newValue.length === 4) {
              this.binding.telephone = this.binding.telephone.trim();
            } else {
              this.binding.telephone = newValue;
            }
          }
        }
      }
  }

};
</script>

<style>
</style>