每当用户喜欢某个帖子并显示帖子上的喜欢数量时，我都会尝试更新 DOM。但是，我意识到我的函数将更新页面上的所有类，而不仅仅是更新某个被喜欢的帖子(当用户单击“竖起大拇指”时，所有“竖起大拇指”按钮都会变为“竖起大拇指”)
我的更改功能:
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
}
我在 Django 中的帖子 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 %}
我的喜好.html:
{% load static %}
<!-- static file were here -->
{% if request.user.is_authenticated %}
<script src="{% static 'js/post.js' %}"></script>
<script src="{% static 'js/comment.js' %}"></script>
<form action="{% url 'home:post-like' post.id %}" method="POST">
{% csrf_token %}
{% if request.user in post.likes.all or is_liked %}
<button type="submit" id="likeBtn" data-url="{% url 'home:post-like' post.guid_url %}" data-token="{{ csrf_token }}" name="post_id" value="{{ post.id }}" class="btn btn-md">
<span class="text-secondary">
<i class="fas fa-thumbs-down"></i>
<span id="like-count">
{{ post.likes.count }}
</span>
<input type="hidden" id="input-like-count" value=" {{ post.likes.count }} " />
</span>
</button>
{% else %}
<button type="submit" id="likeBtn" data-url="{% url 'home:post-like' post.guid_url %}" data-token="{{ csrf_token }}" name="post_id" value="{{ post.id }}" class="btn btn-md">
<span class="text-secondary">
<i class="fas fa-thumbs-up"></i>
<span id="like-count">
{{ post.likes.count }}
</span>
<input type="hidden" id="input-like-count" value=" {{ post.likes.count }} " />
</span>
</button>
{% endif %}
</form>
<div class="modal fade" id="modal-post-detail">
<div class="modal-dialog modal-dialog-scrollable modal-md adjusted-modal-detail">
<div class="modal-content"></div>
</div>
</div>
{% endif %}
我的计划是更改用户的显示，以便在刷新页面之前无需刷新页面并更新计数。但目前，所有 #likeBtn 元素都在更新，而不是单个帖子的元素。如何更新仅被喜欢的帖子的按钮？
编辑:我将 jQuery 更新为此，但它仍然无法正常工作:
$('#like-section #likeBtn').on("click", function (e) {
e.preventDefault();
if($(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"))
}
});
编辑:jsfiddle 链接:https://jsfiddle.net/mf0xvpho/1/ 这似乎现在有效
最佳答案
考虑以下示例。
fiddle :https://jsfiddle.net/Twisty/2hg60be3/13/
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>
JavaScript
$(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);
}
});
});
使用类可以对元素进行分组。您可以使用 .find() 或简写 $("i", this)。它与 $(this).find("i") 相同，只是更短。
关于javascript - 使用 jQuery 仅更新同一 div 类中的一个元素，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/61196016/