vue.js implémente la connexion à l'imprimante

<p class="dialogCare">
        <span>hello word!</span>   //要打印的内容</p>
<button  @click="printBtn()">打 印</button>
 printBtn(){      let newstr = document.getElementsByClassName(&#39;dialogCare&#39;)[0].innerHTML;
      console.log(newstr)
      window.document.body.innerHTML = newstr;      let oldstr = window.document.body.innerHTML;
      window.print();
      window.location.reload();   //解决打印之后按钮失效的问题
      window.document.body.innerHTML = oldstr;      return false;
    },