正则精确到小数点后两位

    var price = e.detail.value;
    // if (!(/^\d+\.[0-9]{2}/).test(price)) {
    if (price.match(/^\d{1,7}(\.\d{0,2})?$|^\.\d{1,2}$/)){
      defaultPrice = price;
      return price;
    }else{
      return defaultPrice;
    }