如何在 jQuery 中找到最近的兄弟姐妹

Question

我正在尝试学习 jQuery，我有以下标记

在一个 div 中，我有两个文本日期和描述以及两个按钮编辑和删除。

当我点击编辑按钮时，我想获取该 div 的日期和描述

我在这里尝试使用parents() 选择器来获取它，我如何在此处使用closest() 选择器，如果当前标记无法使用，请建议我如何继续使用closest() 选择器。

$(document).ready(function() {
  //If i click on edit button . I want to select the corresponding date and description .How can we do that?

  $(".taskTemplate .edit").on('click', function(event) {
    editTask(event.target);
  });
});

function editTask(node) {

  var date = $(node).parents('.taskTemplate').find('.date').html();
  alert(date);
}

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div class="taskTemplate">
  <span class="date">205-10-09</span>
  <span class="desc">description of task</span>
  <input type="button" class="edit" value="edit">
  <input type="button" class="delete" value="delete">
  <span class="done">done</span>
</div>

<div class="taskTemplate">
  <span class="date">2015-11-19</span>
  <span class="desc">description of task2</span>
  <input type="button" class="edit" value="edit">
  <input type="button" class="delete" value="delete">
  <span class="done">done</span>
</div>

Answer 1

只需将parents() 替换为closest() 即可：

var date = $(node).closest('.taskTemplate').find('.date').html();

希望这会有所帮助。

$(document).ready(function() {
  $(".taskTemplate .edit").on('click', function(event) {
      editTask(event.target);
  });
});

function editTask(node) {
  var closest_div = $(node).closest('.taskTemplate');
  
  var date = closest_div.find('.date').text();
  var description = closest_div.find('.desc').text();

  console.log(date, `|`, description);
}

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div class="taskTemplate">
  <span class="date">205-10-09</span>
  <span class="desc">description of task</span>
  <input type="button" class="edit" value="edit">
  <input type="button" class="delete" value="delete">
  <span class="done">done</span>
</div>

<div class="taskTemplate">
  <span class="date">2015-11-19</span>
  <span class="desc">description of task2</span>
  <input type="button" class="edit" value="edit">
  <input type="button" class="delete" value="delete">
  <span class="done">done</span>
</div>

Answer 2

当我点击编辑按钮时，我想获取日期和描述 那个div的

您可以使用.siblings() 选择.date、.desc .edit 元素的兄弟姐妹

$(document).ready(function() {
  //If i click on edit button . I want to select the corresponding date and description .How can we do that?

  $(".taskTemplate .edit").on('click', function(event) {
    editTask($(this).siblings(".date, .desc"));
  });
});

function editTask(nodes) {
 var data = $.map(nodes, function(el) {
    return `${el.className}: ${el.textContent}`
  }).join(", ");

  alert(data);
}

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js">
</script>
<div class="taskTemplate">
  <span class="date">205-10-09</span>
  <span class="desc">description of task</span>
  <input type="button" class="edit" value="edit">
  <input type="button" class="delete" value="delete">
  <span class="done">done</span>
</div>

<div class="taskTemplate">
  <span class="date">2015-11-19</span>
  <span class="desc">description of task2</span>
  <input type="button" class="edit" value="edit">
  <input type="button" class="delete" value="delete">
  <span class="done">done</span>
</div>