vue.js 輸入框輸入值自動過濾特殊字符替換中問標點

<Input v-model="relatedWords" type="textarea" placeholder="請輸入" @input='verifyInput(formItem.relatedWords)'/>

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
    })
},