Javascript 使用jQuery只更新同一div类中的一个元素
每当用户喜欢一篇文章并在文章上显示喜欢的数量时,我都会尝试更新DOM。然而,我意识到我的功能将更新页面上的所有类,而不仅仅是喜欢的某个帖子(当用户单击thmbs up时,所有向上竖起的按钮都变为向下竖起) 我的更改功能类似:Javascript 使用jQuery只更新同一div类中的一个元素,javascript,jquery,html,django,django-templates,Javascript,Jquery,Html,Django,Django Templates,每当用户喜欢一篇文章并在文章上显示喜欢的数量时,我都会尝试更新DOM。然而,我意识到我的功能将更新页面上的所有类,而不仅仅是喜欢的某个帖子(当用户单击thmbs up时,所有向上竖起的按钮都变为向下竖起) 我的更改功能类似: function like_post() { // newly added $('#like-section #likeBtn').on("click", function (e) { e.preventDefault
function like_post() {
// newly added
$('#like-section #likeBtn').on("click", function (e) {
e.preventDefault();
if($("#like-section #likeBtn i").hasClass("fa-thumbs-up")){
($("#like-section #likeBtn i").removeClass("fa-thumbs-up"))
($("#like-section #likeBtn i").addClass("fa-thumbs-down"))
} else {
($("#like-section #likeBtn i").removeClass("fa-thumbs-down"))
($("#like-section #likeBtn i").addClass("fa-thumbs-up"))
}
});
// end
}
Django中的my posts HTML模板:
{% load static %}
<link rel="stylesheet" href="{% static 'css/post/style.css' %}">
<script src="{% static 'js/like-api.js' %}"></script>
<script src="{% static 'js/post.js' %}"></script>
{% for post in posts %}
<script>
$(document).on('click', '.post-detail-clickable-details-view', function () {
var url = $(this).attr("data-url")
document.location.href = url
});
</script>
<div class="row ml-2">
<div class="col-sm-2">
<div class="float-right mb-3 mt-3">
<div>
<img class="img-create-post rounded-circle mr-2" src="https://mdbootstrap.com/img/Photos/Avatars/avatar-5.jpg"
alt="Profile image">
</div>
<div>
<p class="text-muted post-card-date small mr-2">{{ post.get_created_on }} ago</p>
</div>
</div>
</div>
<div class="col-md-10" style="margin-left: -1.6rem;">
<div class="card rounded-0 mb-3 mt-3">
<div class="card-header bg-transparent" style="height: 3rem;">
<h5 style="margin-bottom: 0px;">
<a class="text-dark" style="text-decoration: none;" href="{% url 'home:post-detail' post.guid_url %}">{{ post.title }}</a>
<span class="small text-muted">@{{ post.author.username }}</span>
</h5>
</div>
<div class="card-body post-detail-clickable-details-view text-dark" data-url="{% url 'home:post-detail' post.guid_url %}"
style="margin-top:-0.5rem;">
<a id="post-detail-view-link" href="{% url 'home:post-detail' post.guid_url %}"></a>
<p class="mr-1 text-dark font-weight-bolder">{{ post.author.first_name }} {{ post.author.last_name }}</p>
<p class="card-text pt-2" style="margin-top: -0.9rem;">{{ post.content }}</p>
</div>
<hr style="margin: 0;">
<div class="d-flex align-items-center justify-content-between" >
<div class="row mx-1">
<div id="like-section" class="px-1">
{% include 'home/posts/likes.html' with post=post %}
</div>
<div class="px-1">
<a class="btn btn-md" href="{% url 'home:post-detail' post.guid_url %}">
<span class="text-secondary">
<i class="fas fa-comment"></i> {{ post.comments.count }}
</span>
</a>
</div>
</div>
<div>
<a class="btn btn-md" href="#">
<span class="text-secondary">
<i class="fas fa-share-square"></i>
</span>
</a>
</div>
</div>
</div>
</div>
</div>
{% empty %}
<div class="d-flex justify-content-center">
<h5 class="h5 font-weight-lighter my-3 text-muted">No posts to show</h5>
</div>
{% endfor %}
}))
编辑:jsiddle链接:
这似乎正在起作用请考虑以下示例 小提琴: HTML
<div class="like-section">
<button type="submit" class="likeBtn btn btn-md">
<span class="text-secondary">
<i class="red">Button</i>
<span class="like-count">
3
</span>
</span>
</button>
</div>
<div class="like-section">
<button type="submit" class="likeBtn btn btn-md">
<span class="text-secondary">
<i class="blue">Button</i>
<span class="like-count">
2
</span>
</span>
</button>
</div>
<div class="like-section">
<button type="submit" id="likeBtn" class="btn btn-md">
<span class="text-secondary">
<i class="red">Button</i>
<span class="like-count">
1
</span>
</span>
</button>
</div>
使用类将允许您对元素进行分组。您可以使用
.find()
或速记,$(“i”,this)
。它与$(this)相同。查找(“i”)
,稍短一些。您的选择器似乎有问题:$(“#like section#likeBtn”)
这似乎不存在。{%include'home/posts/likes.html'with post=post%}是否存在于我的代码中我正在尝试仅更新该div中的子元素您的代码中是否有多个id=“like section”
,我看不到{%include'home/posts/likes.html'with post=post%}
会产生什么结果。请提供一个最小的,可复制的例子:是的,我有它的likes.html文件。我正在建立一个JSFIDLE现在我会尽快发送
$('#like-section #likeBtn').on("click", function (e) {
e.preventDefault();
if($(this).find("#i").hasClass("fa-thumbs-up")){
($(this).find("i").removeClass("fa-thumbs-up").addClass("fa-thumbs-down"))
} else {
($(this).find("i").removeClass("fa-thumbs-down").addClass("fa-thumbs-up"))
}
<div class="like-section">
<button type="submit" class="likeBtn btn btn-md">
<span class="text-secondary">
<i class="red">Button</i>
<span class="like-count">
3
</span>
</span>
</button>
</div>
<div class="like-section">
<button type="submit" class="likeBtn btn btn-md">
<span class="text-secondary">
<i class="blue">Button</i>
<span class="like-count">
2
</span>
</span>
</button>
</div>
<div class="like-section">
<button type="submit" id="likeBtn" class="btn btn-md">
<span class="text-secondary">
<i class="red">Button</i>
<span class="like-count">
1
</span>
</span>
</button>
</div>
$(function() {
$('.like-section').on("click", ".likeBtn", function(e) {
var like_count = parseInt($(".like-count", this).text());
e.preventDefault();
if ($("i", this).hasClass("blue")) {
like_count++;
$("i", this).removeClass("blue").addClass("red");
$(".like-count", this).text(like_count);
} else {
like_count--;
$("i", this).removeClass("red").addClass("blue");
$(".like-count", this).text(like_count);
}
});
});