使用 jQuery 的阅读更多功能

17 Mar 2025 | 5 分钟阅读

在本文中，我们将通过各种示例使用 jQuery 创建一个“阅读更多”功能。在文章开头，我们将了解 jQuery 和“阅读更多”功能的基础知识。之后，我们将通过一些示例来理解本文。

jQuery 是什么意思？

“阅读更多”功能在 jQuery 中用于在用户单击“阅读更多”按钮时加载更多数据。JQuery 的引入旨在简化 HTML DOM 树的遍历和操作以及事件处理、CSS 动画和 Ajax。它是一个免费的开源软件。

让我们通过 jQuery 的各种示例来演示“阅读更多”功能。

示例 1

<! DOCTYPE html>
<html>
<head>
<title> Read more functionality using jQuery
</title>
<style>
   @import url(https://fonts.googleapis.com/css?family=Open+Sans:400,700);
body {
    background-color: #f6f6f6;
    width: 400px;
    margin: 20px auto;
    font: normal 13px/100% sans-serif;
    color: #444;
}
h1 {
 font-size: 32px; 
margin-bottom: 50px;
}
h1.sixth {
 position: relative;
 }
h1.sixth:before {
content: '[';
	display: inline-block;
	position: relative;
	top: 1px;
	font-size: 1.25em;
	color: black;
	transition: all 0.5s ease;
}
h1.sixth:after {
	content: '[';
	display: inline-block;
	position: relative;
	top: 1px;
	font-size: 1.25em;
	color: black;
	transition: all 0.5s ease;
}
h1.sixth:after { content: ']';  }
h1.sixth:hover:before { 
	transform: translateX(-5px);
}
h1.sixth:hover:after { 
	transform: translateX(5px);
}
h3.second {
	font-weight: 800;
	font-size:30px;
}
* {
    color: #7F7F7F;
    font-family: Arial, sans-serif;
    font-size: 12px;
    font-weight: normal;
}
h3.second span {
	position: relative;
	display: inline-block;
	padding: 5px 10px ;
	border-radius: 10px;
	font-size: 20px;
	border-bottom: 2px solid #33739E;
}
h3.second span:after {
	content: '';
	position: absolute;
	bottom: calc(-100% - 1px);
	margin-left: -10px;
	display: block;
	width: 100%; height: 100%;
	border-radius: 10px;
	border-top: 1px solid #33739E;
	font-weight: bold;
}
div {
    display:none;
    padding: 10px;
    border-width: 0 1px 1px 0;
    border-style: solid;
    border-color: #fff;
    box-shadow: 0 1px 1px #ccc;
    margin-bottom: 5px;
    background-color: #f1f1f1;
}
.totop {
    position: fixed;
    bottom: 10px;
    right: 20px;
}
.totop a {
    display: none;
}
a {
    color: #33739E;
    text-decoration: none;
    display: block;
    margin: 10px 0;
}
a:visited {
    color: #33739E;
    text-decoration: none;
    display: block;
    margin: 10px 0;
}
a:hover {
    text-decoration: none;
}
#loadMore {
    padding: 10px;
    text-align: center;
    background-color: #33739E;
    color: #fff;
    border-width: 0 1px 1px 0;
    border-style: solid;
    border-color: #fff;
    box-shadow: 0 1px 1px #ccc;
    transition: all 600ms ease-in-out;
    -webkit-transition: all 600ms ease-in-out;
    -moz-transition: all 600ms ease-in-out;
    -o-transition: all 600ms ease-in-out;
}
#loadMore:hover {
    background-color: #fff;
    color: #33739E;
}
.six h1 {
  text-align: center;
  color:#222; 
 font-size:30px; 
font-weight: 400;
 text-transform: uppercase;
 word-spacing: 1px;
 letter-spacing: 2px; 
color: #c50000;
}
.six h1 span {
  line-height :2em; 
 padding-bottom:15px;
  text-transform: none;
  font-size:.7em;
  font-weight: normal;
  font-style: italic; 
font-family:  "Playfair Display","Bookman",serif;
 color: #999; 
letter-spacing: -0.005em; 
word-spacing: 1px;
  letter-spacing: none;
}
.six h1:after, .six h1:before {
  position: absolute;
  left: 0;
  bottom: 0;
  width: 45px;
  height: 4px;
  content: "";
  right: 45px; 
  margin:auto;
  background-color: #ccc;
}
.six h1:before { 
background-color: #d78b8b;
  left: 45px; width: 90px;
}
</style>
</head>
<body>
<h1 align="center" class="sixth"> Example </h1>		   
<h3 align="center" class="second"> <span> Read more functionality using jQuery </span> </h3>  
<div class="six">
  <h1> 
    <span> Be aware that a retired Juniper Customer Care phone number is being used fraudulently.  </span>
  </h1>
</div>
<div> Content </div>
<div> Content </div>
<div> Be aware that a retired Juniper Customer Care phone number is being used fraudulently. </div>
<div> Content </div>
<div> Content </div>
<div> Content </div>
<div> Content </div>
<div> Be aware that a retired Juniper Customer Care phone number is being used fraudulently. </div>
<div> Content </div>
<div> Content </div>
<div> Content </div>
<a href="#" id="loadMore"> Read More </a>
<p class="totop"> 
    <a href="#top"> Back to top </a> 
</p>
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/2.1.3/jquery.min.js"> </script> 
<script type="text/javascript">
$(function () {
    $("div").slice(0, 4).show();
    $("#loadMore").on('click', function (e) {
        e.preventDefault();
        $("div:hidden").slice(0, 4).slideDown();
        if ($("div:hidden").length == 0) {
            $("#load").fadeOut('slow');
        }
        $('html,body').animate({
            scrollTop: $(this).offset().top
        }, 1500);
    });
});
$('a[href=#top]').click(function () {
    $('body,html').animate({
        scrollTop: 0
    }, 600);
    return false;
});
$(window).scroll(function () {
    if ($(this).scrollTop() > 50) {
        $('.totop a').fadeIn();
    } else {
        $('.totop a').fadeOut();
    }
});
</script>
</body>
</html>

说明

在上面的示例中，我们使用 jquery 创建了一个“阅读更多”功能。

输出

当用户点击“阅读更多”按钮时，会显示以下输出。

示例 2

<! DOCTYPE html>
<html>
<head>
<title> Read more functionality using jQuery
</title>
<style>
  @import url('https://fonts.googleapis.com/css?family=Raleway');
#text {
display: none;
}
.btn-container {
  margin: auto;
  height: 44px;
  width: 166.23px;
}
a:active {
  color:#ffd323;
}
body {
   background-color: aqua;
}
button {
  user-select: none;
  -webkit-user-select: none;
  -moz-user-select: none;
  -ms-user-select: none;
  cursor: pointer;
  border: none;
  padding: 8px;
  font-size: 20px;
  background: linear-gradient(141deg, #0fb8ad 0%, #1fc8db 51%, #2cb5e8 75%);
  color: white;
  font-family: cursive;
  box-sizing: border-box;
}
body {
  font-family: 'Raleway',monospace;
  font-size: 20px;
  color: white;
}
.five h1 {
  text-align: center;
  font-size: 22px;
  font-weight: 700; 
   color: #202020;
  text-transform: uppercase;
  word-spacing: 1px; 
 letter-spacing: 2px;
}
h1 {
  position: relative;
  padding: 0;
  margin: 10;
  font-family: "Raleway", sans-serif;
  font-weight: 300;
  font-size: 40px;
  color: #080808;
  -webkit-transition: all 0.4s ease 0s;
  -o-transition: all 0.4s ease 0s;
  transition: all 0.4s ease 0s;
}
h1 span {
  display: block;
  font-size: 0.5em;
  line-height: 1.3;
}
h1 em {
  font-style: normal;
  font-weight: 600;
}
.five h1 span {
  margin-top: 40px;
  text-transform: none;
  font-size:.75em;
  font-weight: normal;
  font-style: italic; font-family: "Playfair Display","Bookman",serif;
  color: #999; 
 letter-spacing: -0.005em; 
word-spacing: 1px;
  letter-spacing: none;
}
.five h1:before {
  position: absolute;
  left: 0;
  bottom: 38px;
  width: 60px;
  height: 4px;
  content: "";
  left: 50%;
  margin-left: -30px;
  background-color: #dfdfdf;
}
</style>
</head>
<body>
<div class="five">
  <h1> Example 
    <span> Read more functionality using jQuery </span>
  </h1>
</div>
Cascading Style Sheets (CSS) is a style sheet language used for describing the presentation of a document written in a markup language. Although most often used to set the visual style of web pages and user interfaces written in HTML and XHTML, the language can be applied to any XML document, including plain XML, SVG, and XUL, and applies to rendering in speech or on other media. Along with HTML and JavaScript.
<div>
  <br>
 <span id="text"> CSS is designed primarily to enable the separation of document content from document presentation, including aspects such as the layout, colors, and fonts. 
<br>
  </span>
</div>
<div class="btn-container">
<button id="toggle"> Read More </button>
</div>	
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/2.1.3/jquery.min.js"> </script> 
<script type="text/javascript">
$(document).ready(function() {
  $("#toggle").click(function() {
    var elem = $("#toggle").text();
    if (elem == "Read More") {
      //Stuff to do when btn is in the read more state
      $("#toggle").text("Read Less");
      $("#text").slideDown();
    } else {
      //Stuff to do when btn is in the read less state
      $("#toggle").text("Read More");
      $("#text").slideUp();
    }
  });
  $('a[href=#top]').click(function () {
    $('body,html').animate({
        scrollTop: 0
    }, 600);
    return false;
});
});
</script>
</body>
</html> 

说明

在上面的示例中，我们使用 jQuery 创建了一个“阅读更多”功能。当用户点击“阅读更多”按钮时，文本就会加载。

输出

以下是此示例的输出

下一话题jQuery CDN

使用 jQuery 的阅读更多功能

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