//模拟data数据
      data(
       return {
          price:‘88888.00‘
          }
       )
    //ps:v-html绑定数据
    //1.分割价钱 => ["88888", "00"]
    let splitPrice = this.price.split(".");
    //2.重新赋值
    this.price = `${splitPrice[0]}.<span style="font-size:12px;">${splitPrice[1]}</span>`;