为calculateRowProductData函数新增功能：修改sub_total计算逻辑并更新字段

function calculateRowProductData(quantity) {
    // 假设lens和cutting_charge是按rowindex存储的全局数组，若实际来源不同请自行调整
    const lensPrice = lens[rowindex];
    const cuttingCharge = cutting_charge[rowindex];
    const rowTotalBase = (lensPrice + cuttingCharge);

    if(product_type[pos] == 'standard')
        unitConversion();
    else
        row_product_price = product_price[rowindex];

    const $currentRow = $('table.order-list tbody tr:nth-child(' + (rowindex + 1) + ')');

    // 更新lens和cutting_charge的显示与输入字段
    $currentRow.find('.lens').text(lensPrice.toFixed({{$general_setting->decimal}}));
    $currentRow.find('.lens-value').val(lensPrice.toFixed({{$general_setting->decimal}}));
    $currentRow.find('.cutting-charge').text(cuttingCharge.toFixed({{$general_setting->decimal}}));
    $currentRow.find('.cutting-charge-value').val(cuttingCharge.toFixed({{$general_setting->decimal}}));

    $currentRow.find('.discount').text((product_discount[rowindex] * quantity).toFixed({{$general_setting->decimal}}));
    $currentRow.find('.discount-value').val((product_discount[rowindex] * quantity).toFixed({{$general_setting->decimal}}));
    $currentRow.find('.tax-rate').val(tax_rate[rowindex].toFixed({{$general_setting->decimal}}));


    if (tax_method[rowindex] == 1) {
        // 基于新的rowTotalBase计算税和小计，若税的计算逻辑需调整请根据实际需求修改
        const net_unit_price = rowTotalBase - product_discount[rowindex];
        const tax = net_unit_price * quantity * (tax_rate[rowindex] / 100);
        const sub_total = rowTotalBase * quantity + tax;

        $currentRow.find('.net_unit_price').text(net_unit_price.toFixed({{$general_setting->decimal}}));
        $currentRow.find('.net_unit_price').val(net_unit_price.toFixed({{$general_setting->decimal}}));
        $currentRow.find('.tax').text(tax.toFixed({{$general_setting->decimal}}));
        $currentRow.find('.tax-value').val(tax.toFixed({{$general_setting->decimal}}));
        $currentRow.find('.sub-total').text(sub_total.toFixed({{$general_setting->decimal}}));
        $currentRow.find('.subtotal-value').val(sub_total.toFixed({{$general_setting->decimal}}));
    } else {
        const sub_total_unit = rowTotalBase - product_discount[rowindex];
        const net_unit_price = (100 / (100 + tax_rate[rowindex])) * sub_total_unit;
        const tax = (sub_total_unit - net_unit_price) * quantity;
        const sub_total = rowTotalBase * quantity;

        $currentRow.find('.net_unit_price').text(net_unit_price.toFixed({{$general_setting->decimal}}));
        $currentRow.find('.net_unit_price').val(net_unit_price.toFixed({{$general_setting->decimal}}));
        $currentRow.find('.tax').text(tax.toFixed({{$general_setting->decimal}}));
        $currentRow.find('.tax-value').val(tax.toFixed({{$general_setting->decimal}}));
        $currentRow.find('.sub-total').text(sub_total.toFixed({{$general_setting->decimal}}));
        $currentRow.find('.subtotal-value').val(sub_total.toFixed({{$general_setting->decimal}}));
    }

    calculateTotal();
}

关键修改说明 #

• 新增字段更新: 加入了lens和cutting_charge的DOM同步逻辑，将对应值更新到页面的显示文本和输入框中（若实际DOM类名与示例不同，请替换为项目中实际使用的类名）
• 调整小计计算逻辑: 将sub_total的计算方式替换为(lens + cutting_charge) * quantity，同时适配两种计税方式的场景
• 代码优化: 缓存当前行的jQuery对象，避免重复DOM查询，提升执行效率
• 语义化变量: 新增rowTotalBase变量，让计算逻辑更直观易懂

内容的提问来源于stack exchange，提问作者Mohamed rifky