JQuery 附加到子元素

Question

我有一個像這樣的 jQuery。

$.each($(".fc-daygrid-day "), function (key, val) {
  var dateYMD = $(this).attr("data-date");
  console.log(this); 
  $(this).append(`<div class="fc-dailytotal" id='dailytotal-" + dateYMD + "'></div>`);
});

它返回這樣的東西。 （這是我在console.log(this)時得到的）

<td class="fc-daygrid-day fc-day fc-day-thu fc-day-future fc-day-other" data-date="2020-11-05">
  <div class="fc-daygrid-day-frame fc-scrollgrid-sync-inner"> <!-- line 2 -->
    <div class="fc-daygrid-day-top"><a class="fc-daygrid-day-number">5</a></div>
    <div class="fc-daygrid-day-events"></div>
    <div class="fc-daygrid-day-bg"></div>
  </div>
  <div class="fc-dailytotal" id="dailytotal-&quot; + dateYMD + &quot;">0</div> <!-- line 1 -->
</td>

我想在第 2 行 div 標簽內附加第 1 行？ 我想要的最終結果如下。 謝謝你。 （我是 JQuery 的新手）

<td class="fc-daygrid-day fc-day fc-day-thu fc-day-future fc-day-other" data-date="2020-11-05">
  <div class="fc-daygrid-day-frame fc-scrollgrid-sync-inner"> <!-- line 2 -->
    <div class="fc-daygrid-day-top"><a class="fc-daygrid-day-number">5</a></div>
    <div class="fc-dailytotal" id="dailytotal-&quot; + dateYMD + &quot;">0</div> <!-- line 1 -->
    <div class="fc-daygrid-day-events"></div>
    <div class="fc-daygrid-day-bg"></div>
  </div>
</td>

Answer 1

您可以使用find()定位子元素，然后使用after()插入要直接在其下方顯示的內容。 另請注意，您的字符串連接語法不正確。 當您使用模板文字時，您需要使用${foo}將值插入到字符串中。 嘗試這個：

$.each($(".fc-daygrid-day"), function (key, val) {
  var dateYMD = $(this).attr("data-date");
  $(this).find('.fc-daygrid-day-top').after(`<div class="fc-dailytotal" id='dailytotal-${dateYMD}'></div>`);
});

另外值得注意的是代碼可以改進。 首先使用data()讀取data屬性，以便結果具有更強的類型。 此外，考慮到您實際嘗試實現的目標，您根本不需要顯式的each()循環。 您可以為after()提供一個動態生成內容的函數。

 $('.fc-daygrid-day .fc-daygrid-day-top').after(function() { let dateYMD = $(this).closest('.fc-daygrid-day').data('date'); return `<div class="fc-dailytotal" id="dailytotal-${dateYMD}">Example: ${dateYMD}</div>` });

 <script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script> <table> <tbody> <tr> <td class="fc-daygrid-day fc-day fc-day-thu fc-day-future fc-day-other" data-date="2020-11-05"> <div class="fc-daygrid-day-frame fc-scrollgrid-sync-inner"> <div class="fc-daygrid-day-top"><a class="fc-daygrid-day-number">5</a></div> <div class="fc-daygrid-day-events"></div> <div class="fc-daygrid-day-bg"></div> </div> </td> </tr> <tr> <td class="fc-daygrid-day fc-day fc-day-thu fc-day-future fc-day-other" data-date="2021-12-15"> <div class="fc-daygrid-day-frame fc-scrollgrid-sync-inner"> <div class="fc-daygrid-day-top"><a class="fc-daygrid-day-number">10</a></div> <div class="fc-daygrid-day-events"></div> <div class="fc-daygrid-day-bg"></div> </div> </td> </tr> </tbody> </table>

Answer 2

而不是使用append ，你只需要使用prepend ：

$.each($(".fc-daygrid-day"), function (key, val) {
  var dateYMD = $(this).attr("data-date");
  $(this).prepend(`<div class="fc-dailytotal" id='dailytotal-" + dateYMD + "'>prepending</div>`);
});

prepend將在您要添加到的元素的第一個子元素之前插入新節點，而append將它插入到最后一個 child 之后。 參考： MDN Docs for prep

工作示例：

 $.each($(".fc-daygrid-day"), function (key, val) { var dateYMD = $(this).attr("data-date"); $(this).prepend(`<div class="fc-dailytotal" id='dailytotal-" + dateYMD + "'>ADDED</div>`); });

 <script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script> <table><tr> <td class="fc-daygrid-day fc-day fc-day-thu fc-day-future fc-day-other" data-date="2020-11-05"> <div class="fc-daygrid-day-frame fc-scrollgrid-sync-inner"> <!-- line 2 --> <div class="fc-daygrid-day-top"><a class="fc-daygrid-day-number">5</a></div> <div class="fc-daygrid-day-events"></div> <div class="fc-daygrid-day-bg"></div> </div> </td> </tr></table>