請教一下修改Javascript語法

html css javascript

crazy317619 2022-06-13 15:09:41 ‧ 1290 瀏覽

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需求是折數"請用%數邏輯更改公式並加上%->請用%off的概念
例如原本的80->新的20%off

目前在語法上是這樣請問如何修改
小弟沒這方面的經驗請大大指教

Hans5300609 iT邦研究生 4 級 ‧ 2022-06-13 17:45:27 檢舉

標題要不要改成Javascript...
然後程式碼請善用標註程式碼功能

crazy317619 iT邦新手 5 級 ‧ 2022-06-14 16:44:22 檢舉

不太會使用>"<
感謝指導

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1 個回答

mantissa23bit

iT邦新手 4 級 ‧ 2022-06-13 15:39:28

最佳解答

document.getElementById(discount_i).value = d_price / 100 * 10000 / 10000;

改成

document.getElementById(discount_i).value = 100-(d_price / 100 * 10000 / 10000)+"%";

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crazy317619 iT邦新手 5 級 ‧ 2022-06-14 16:43:52 檢舉

大大再請教一個問題
各類別售價"折扣公式請更改為7折

switch (type) {
        case 'K6':
        // 拿company去比對ARR如果成功
        if (AtoEArr.indexOf(company) !== -1) {
          final_price = L_money * 0.85 * 100000 / 100000;
        } if (BtoW.indexOf(company) !== -1) {
          final_price = L_money;
        } if (YtoZ.indexOf(company) !== -1 ) {
          final_price = L_money;
        }           
        break;
        case 'K9':
        if (AtoEArr.indexOf(company) !== -1) {
          final_price = L_money * 0.85 * 100000 / 100000;
        } if (BtoW.indexOf(company) !== -1) {
          final_price = L_money;
        } if (YtoZ.indexOf(company) !== -1 ) {
          final_price = L_money;
        } 
        break;
        case 'K3':
        if (AtoEArr.indexOf(company) !== -1) {
          final_price = L_money * 0.7 * 100000 / 100000;
        } if (BtoW.indexOf(company) !== -1) {
          final_price = L_money;
        } if (YtoZ.indexOf(company) !== -1 ) {
          final_price = L_money * 0.9 * 100000 / 100000;
        } 
        break;
        case 'KF':
        if (AtoEArr.indexOf(company) !== -1) {
          final_price = L_money * 0.8 * 100000 / 100000;
        } if (BtoW.indexOf(company) !== -1) {
          final_price = L_money;
        } if (YtoZ.indexOf(company) !== -1 ) {
          final_price = L_money * 0.8 * 100000 / 100000;
        }
        break;
        case 'KM':
        if (AtoEArr.indexOf(company) !== -1) {
          final_price = L_money * 0.85 * 100000 / 100000;
        } if (BtoW.indexOf(company) !== -1) {
          final_price = L_money;
        } if (YtoZ.indexOf(company) !== -1 ) {
          final_price = L_money;
        } 
        break;
        default:
      }
      if (L_money) {
      document.getElementById(price_i).value = final_price;
      }
    }   
  }

  function discount_price(L_price) {
    for (var i = 1 ; i <= 10 ; i++) {
      var price_i = "Price" + i;
      var price = Number(document.getElementById(price_i).value);
      var L_price_i = "Ltem_price" + i;
      var L_price = Number(document.getElementById(L_price_i).value);
      var discount_i = "Discount" + i;
      var d_price = "";
      d_price = Math.round((L_price/price) * 10000 * 10000 / 10000);
      if (L_price){
      document.getElementById(discount_i).value = 100-(d_price / 100 * 10000 / 10000)+"%"; 
      }
    }
  }

是需要修改甚麼

大大再請教一個問題
各類別售價"折扣公式請更改為7折
```
switch (type) {
        case 'K6':
        // 拿company去比對ARR如果成功
        if (AtoEArr.indexOf(company) !== -1) {
          final_price = L_money * 0.85 * 100000 / 100000;
        } if (BtoW.indexOf(company) !== -1) {
          final_price = L_money;
        } if (YtoZ.indexOf(company) !== -1 ) {
          final_price = L_money;
        }           
        break;
        case 'K9':
        if (AtoEArr.indexOf(company) !== -1) {
          final_price = L_money * 0.85 * 100000 / 100000;
        } if (BtoW.indexOf(company) !== -1) {
          final_price = L_money;
        } if (YtoZ.indexOf(company) !== -1 ) {
          final_price = L_money;
        } 
        break;
        case 'K3':
        if (AtoEArr.indexOf(company) !== -1) {
          final_price = L_money * 0.7 * 100000 / 100000;
        } if (BtoW.indexOf(company) !== -1) {
          final_price = L_money;
        } if (YtoZ.indexOf(company) !== -1 ) {
          final_price = L_money * 0.9 * 100000 / 100000;
        } 
        break;
        case 'KF':
        if (AtoEArr.indexOf(company) !== -1) {
          final_price = L_money * 0.8 * 100000 / 100000;
        } if (BtoW.indexOf(company) !== -1) {
          final_price = L_money;
        } if (YtoZ.indexOf(company) !== -1 ) {
          final_price = L_money * 0.8 * 100000 / 100000;
        }
        break;
        case 'KM':
        if (AtoEArr.indexOf(company) !== -1) {
          final_price = L_money * 0.85 * 100000 / 100000;
        } if (BtoW.indexOf(company) !== -1) {
          final_price = L_money;
        } if (YtoZ.indexOf(company) !== -1 ) {
          final_price = L_money;
        } 
        break;
        default:
      }
      if (L_money) {
      document.getElementById(price_i).value = final_price;
      }
    }   
  }

修改