父母/兄弟姐妹/子女：努力選擇相關元素

Question

我正在創建一個博客，並嘗試使用JQuery切換編輯評論表單。

這是評論顯示部分的完整代碼：

<!--================== 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，這是選擇所有動態顯示的項目（注釋），因此當我單擊“ .edit”元素時，所有注釋都會顯示其編輯框。 我知道這與我如何根據父母/兄弟姐妹等選擇它們有關，但是無法弄清楚應該是什么！

Answer 1

@Satpal的評論非常完美，值得贊揚，盡管他的仁慈，但我將嘗試更深入地探討其邏輯：

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

由於.edit是內部 .row和.edit-comment-form 之前 （ .row ），基本上你正在影響以前 .edit-comment-form最接近的.row的點擊的.edit 。

對於簡單的單詞，最接近的行與單擊的編輯相同，並且將切換其先前的文本區域（ .edit-comment-form ）。

這是prev（）和最近的（） jQuery方法的通用示例：

• 還要注意為什么find()不起作用，因為它切換了嵌套在#comments所有.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>