jquery on() 函数并使用遍历得到 value/text

jquery on() function and get value/text using traversing

如何使用 on() 函数获得 value/text?

html w/php 来自 ajax 回复

echo "<div class='cartItem-buyingItem'>";
        echo "<a href='#' class='buyingItem-closed styleCrl-gry1 stxt10'>X<span class='pid'>".$row["prdct_id"]."</span><br></a>";           
        echo "<div class='buyingItem-img'>";
            echo "<img src='../".$row['prdct_picture']."'>";
        echo "</div>";
        echo "<div class='buyingItem-details styleCrl-gry'>";
            echo "<div class='buyingItem-desc styleCrl-gry2 stxt12'>";
                echo substr($row['prdct_description'],0,130)."...";
            echo "</div>";
        echo "</div>";
        echo "<div class='buyingItem-origPrcng'>";
            echo "<div class='buyingItem-unitPrice byngItm-untPrc stxt16 styleCrl-green'>". number_format($row['prdct_newPrice'] ,2) ."</div>";
            echo "<div class='buyingItem-disPrice stxt12 styleCrl-gry2'>". number_format($row['prdct_price'] ,2) ."</div>";
        echo "</div>";
        echo "<div class='buyingItem-qty'>";
            echo "<select class='buyingItem-qty-total'>";
                echo "<option value='".array_count_values($allcart_num)[$row['prdct_id']]."'>".array_count_values($allcart_num)[$row['prdct_id']]."</option>";
                echo "<option value='4'>4</option>";
                echo "<option value='6'>6</option>";
                echo "<option value='8'>8</option>";                
            echo "</select>";
        echo "</div>";
        echo "<div class='buyingItem-subPrcng'>";
            echo "<div class='buyingItem-ttlPrice stxt16 styleCrl-green'>". number_format( bcmul(array_count_values($allcart_num)[$row['prdct_id']] , $row['prdct_newPrice'] ,2) ,2) ."</div>";
            echo "<div class='buyingItem-ttlDisPrice stxt12 styleCrl-gry2'>". number_format( bcmul(array_count_values($allcart_num)[$row['prdct_id']] , $row['prdct_price'] ,2) ,2) ."</div>";
        echo "</div>";
    echo "</div>";  

脚本

$(".cartItem-Load").on('change', '.buyingItem-qty select', function(){      
    alert($(this).val());
    alert($(this).find('.buyingItem-unitPrice').text());//always null/undefined result 
})

如何在 jquery 上使用右遍历获得其他 parents child 值?

我需要获取 select .buyingItem-unitPrice 的值并乘以 select 值 .buyingItem-qty select

您的代码的问题是 find() 用于查找子元素,而 .buyingItem-unitPrice 元素是 select 父元素的兄弟元素的子元素。要检索它,您可以使用 closest() 的组合来获取公共父级,然后使用 find()。试试这个:

$(".cartItem-Load").on('change', '.buyingItem-qty select', function() { 
    var unitPrice = $(this).closest('.cartItem-buyingItem').find('.buyingItem-unitPrice').text();
    var total = parseInt($(this).val(), 10) * parseFloat(unitPrice);
    console.log(total);
})