Parents/siblings/children：努力select相关元素

Question

我正在创建博客并尝试使用 JQuery 切换编辑评论表单。

评论显示部分的完整代码如下：

<!--================== COMMENTS DISPLAY SECTION     ====================================================================-->
<div id="comments">
    <% blog.comments.forEach(function(comment){ %>
    <div class="jumbotron comment">
        <div class="row">
            <div class="col-md-1">
                <img class="comment-ico" src = "<%=comment.author.image%>">
            </div>

            <div class="col-md-7">
                <h4><%=comment.author.username%></h4>
            </div>
            <div class="col-md-4 date">
                 <%= comment.created.toDateString()%>
            </div>
        </div>
    </div>
        <div><p><%=comment.text%></p></div>

<!--=================EDIT COMMENT FORM =========================================================================-->
   <form class="edit-comment-form" action = "/blogs/<%= blog._id %>/comments" method = "POST" id="newComment">
        <textarea class = "form-control" rows="4" placeholder = "Type comment here..." name = "comment[text]"></textarea>
        <button class = "btn btn-lg btn-primary btn-block">Submit</button>
    </form>
<!--    ==================================================================================================================-->
<!--=================COMMENT OPTIONS (visible if user = author) =====================================================-->

    <% if(currentUser && currentUser.username == comment.author.username) { %>
        <div class="row">
            <div class="col-md-1 choice">
                <a class="edit">Edit</a>
            </div>
            <div class="col-md-1">
                <form id = "delete-form" action = "/blogs/<%= blog._id %>/comments/<%=comment._id%>?_method=DELETE" method = "POST">
                <input type = "submit" class = "button-delete" value = "Delete"></form>
            </div>
        </div>
    <% } %>
    <hr class = "style-three">
    <% }) %>
</div>
</div>
<!--====================================================================================================================-->
<!--======================ADD COMMENT FORM ================================================================================    -->
<% if(currentUser){ %>
<div class = "container form">
   <form action = "/blogs/<%= blog._id %>/comments" method = "POST"  id="newComment">
    <div class="row">
        <div class="col-md-2">
            <img class="newComment-ico" src = "<%=currentUser.image%>">
        </div>
        <div class="col-md-10">
            <label for="comment">Add comment</label>
        </div>
    </div>
        <textarea class = "form-control" rows="4" placeholder = "Type comment here..." name = "comment[text]"></textarea>
        <button class = "btn btn-lg btn-primary btn-block">Submit</button>
    </form>
</div>

<% } %>

我的JS如下：

$('#comments').on('click', '.edit', function(){
$(this).parents().siblings('.edit-comment-form').toggle();
})

但是，这是选择所有动态显示的项目（评论），这样当我单击“.edit”元素时，所有评论都会显示它们的编辑框。我知道这与我如何根据 parent/sibling 等选择它们有关，但无法确定它应该是什么！

Answer 1

@Satpal 的评论很完美，归功于他，尽管如此，但在他的怜悯下，我会尝试更深入地研究逻辑：

$('#comments').on('click', '.edit', function() {
    $(this).closest('.row').prev('.edit-comment-form').toggle();
});

因为 .edit 在 .row 和 .edit-comment-form 的 里面 before it (.row)，基本上你是在影响previous .edit-comment-form 最近的 .row 被点击 .edit。

用更简单的话来说，最近的行与单击的编辑相同，并且它的前一个文本区域 (.edit-comment-form) 将被切换。

这是 prev() & closest() jQuery 方法的通用示例：

还要注意为什么 find() 不起作用，因为它会切换嵌套在 #comments.

.edit-comment-form

var selected = $("#start");
selected.css("background", "gainsboro");

//prev() - Will select previous element disregarding tag name
$(".prev").on('click', function() {
  selected = selected.prev();
  $("div").css("background", "");
  $("nav").css("background", "");
  $("section").css("background", "");
  $("span").css("background", "")
  selected.css("background", "gainsboro");
});

//closest() - Will highlight red only if selected element is a div
$(".closest").on('click', function() {
  selected.closest('div').css("background", "red");
});

//find() - Will only highlight when span element is child 
$(".find").on('click', function() {
  selected.find('span').css("background", "red");
});

//Reset
$(".reset").on('click', function() {
  $("div").css("background", "");
  $("nav").css("background", "");
  $("section").css("background", "");
  $("span").css("background", "");
  selected = $("#start");
  selected.css("background", "gainsboro");
});

div {
  width: 40px;
  height: 40px;
  margin: 10px;
  float: left;
  border: 2px lightgray solid;
  padding: 2px;
}

.inline {
  float: left;
  margin: 10px;
  width: 48px;
  text-align: center;
  line-height: 48px;
}

#row {
  width: 100%;
  border: none;
  padding: 0;
  margin: 0;
  height: 60px;
}

section {
  width: 40px;
  height: 40px;
  margin: 10px;
  float: left;
  border: 2px lightgray solid;
  padding: 2px;
}

nav {
  width: 40px;
  height: 40px;
  margin: 10px;
  float: left;
  border: 2px lightgray solid;
  padding: 2px;
}

span {
  font-size: 14px;
  word-wrap: break-word;
}

button {
  margin: 10px;
  padding: 10px;
  background: transparent;
  border: 2px solid gray;
  border-radius: 3px;
  color: gray;
  font-size: 12px;
}

button:hover {
  background: gray;
  color: white;
}

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<section id="row">
  <div></div>
  <div class="find"></div>
  <span class="inline">span</span>
  <div><span>find() here</span></div>
  <section></section>
  <nav></nav>
  <div id="start"></div>
</section>
<button class="prev">test prev()</button>
<button class="closest">test closest()</button>
<button class="find">test find()</button>
<button class="reset">reset</button>

Parents/siblings/children：努力select相关元素

Parents / siblings / children: struggling to select relevant element

jquery

parent

parent-child

siblings