verifyInput(v){
  let _this=this;
  let punctuation = /[`~!@#$%^&*_\-=<>"{}|.\/;'\\[\]·~！@#￥%……&——\-={}|《》？：“”【】、；‘'。、]/im;
  let arr=v.split('')
  let str=''
  arr.map(i=>{
    if(!punctuation.test(i)){
     str+=i
    }
  })
  str=str.replace(/（/g,'(')
  str=str.replace(/）/g,')')
  str=str.replace(/，/g,',')
  this.$nextTick(j=>{
    this.relatedWords=str
  })
},

<el-input
 size="small"
 v-model="city"
 placeholder="请输入城市名称"
 @blur="addCity(scope.$index)"
 @keyup.native="btKeyUp"
 @keydown.native="btKeyDown"
></el-input>
 
// methods内 
 
   // 只能输入汉字、英文、数字
  btKeyDown(e) {
    e.target.value = e.target.value.replace(/[^\a-\z\A-\Z0-9\u4E00-\u9FA5]/g,"");
  },
  //限制输入特殊字符
  btKeyUp(e) {
    e.target.value = e.target.value.replace(/[`~!@#$%^&*()_\-+=<>"{}|,.\/;'\\[\]·~！@#￥%……&*（）——\-+={}|《》？：“”【】、；‘'，。、]/g,"");
  }

 <el-input
  size="small"
  v-model="scope.row.order_number"
  v-show="scope.row.isShowInp_order"
  @blur="editOrder(scope.$index,scope.row)"
  v-focus
  @keyup.native="UpNumber"
  @keydown.native="UpNumber"
  class="table_input"       
></el-input>  
 
// 只可输入数字 
  UpNumber(e) {
    e.target.value = e.target.value.replace(/[^\d]/g,"");
  }