Web Front-endJS TutorialjQuery realizes the special effect of popping up the picture when the mouse slides over it_jquery
This chapter introduces a commonly used effect, that is, when the mouse slides over a link, a layer that follows the movement of the mouse pointer can appear. In practical applications, it is usually some explanatory text or pictures for the link, etc. Wait,
Let’s take a look at a demo picture first
The following is a code example:
<link rel="stylesheet" href="../css/common.css" type="text/css" />
<script type="text/javascript" src="../js/jquery-1.2.6.pack.js"></script>
<script type="text/javascript" src="../js/jquery.imagePreview.1.0.js"></script>
<script type="text/javascript">
$(function(){
$("a.preview").preview();
});
</script>
<style type="text/css">
html{overflow-y:scroll;}
a.preview,a.preview:hover{text-decoration:none;}
a.preview img{margin:20px 10px;}
</style>
</head>
<body>
<div class="zxx_out_box">
<div class="zxx_in_box">
<h3 id="图片放大显示的jQuery插件演示页面">图片放大显示的jQuery插件演示页面</h3>
<div class="zxx_main_con">
<div class="zxx_test_list">
<a class="preview" href="http://image.jb51.net/image/study/s/s256/mm1.jpg" title="张含韵">
<img src="/static/imghwm/default1.png" data-src="http://image.jb51.net/image/study/s/s128/mm1.jpg" class="lazy" / alt="jQuery realizes the special effect of popping up the picture when the mouse slides over it_jquery" >
</a>
<a class="preview" href="http://image.jb51.net/image/study/s/s256/mm2.jpg" title="某不知名美女">
<img src="/static/imghwm/default1.png" data-src="http://image.jb51.net/image/study/s/s128/mm2.jpg" class="lazy" / alt="jQuery realizes the special effect of popping up the picture when the mouse slides over it_jquery" >
</a>
<a class="preview" href="http://image.jb51.net/image/study/s/s256/mm3.jpg" title="某不知名美女">
<img src="/static/imghwm/default1.png" data-src="http://image.jb51.net/image/study/s/s128/mm3.jpg" class="lazy" / alt="jQuery realizes the special effect of popping up the picture when the mouse slides over it_jquery" >
</a>
<a class="preview" href="http://image.jb51.net/image/study/s/s256/mm4.jpg" title="某不知名美女">
<img src="/static/imghwm/default1.png" data-src="http://image.jb51.net/image/study/s/s128/mm4.jpg" class="lazy" / alt="jQuery realizes the special effect of popping up the picture when the mouse slides over it_jquery" >
</a>
<a class="preview" href="http://image.jb51.net/image/study/s/s256/mm5.jpg" title="某不知名美女">
<img src="/static/imghwm/default1.png" data-src="http://image.jb51.net/image/study/s/s128/mm5.jpg" class="lazy" / alt="jQuery realizes the special effect of popping up the picture when the mouse slides over it_jquery" >
</a>
</div>
</div>
</div>
</div>
</body>
</html>
The above code has achieved our requirements, what do you guys think?
Next let’s take a look at a brief description of how to use it:
1. You need to use the href attribute of the a tag. The principle of this jQuery plug-in is that when the mouse moves to the thumbnail (or link text), a large image html fragment containing the href pointing path will be loaded. This fragment is based on the mouse Position is absolutely positioned. This produces the effect of moving the mouse over the thumbnail to display the larger image. The address of the large image is the content of the href attribute of the a tag. For example: Thumbnail If the a tag contains a method to display a large image, the page will display the image "xx.jpg" pointed to by the href.
2. The method used is: target selector.preview(); For example, for the above thumbnail, you can use $("a"). preview(); This code implements the effect of displaying the image xx.jpg when the mouse is moved to the text link "Thumbnail".
3. Only four formats of images, png, gif, jpg, and bmp, are supported. You can modify the regular expression of the plug-in code to expand the supported image format types.
The following is a brief introduction to the implementation process:
1. Code comments:
1.this.screenshotPreview=function(){ }, declares a function to implement the following effect. In this effect, this can actually be omitted, it points to the window.
2.xOffset=10, declare a variable to specify the horizontal distance of the mouse pointer from the pop-up image.
3.yOffset=30, declare a variable to specify the vertical distance of the mouse pointer from the pop-up image.
4.$("a.screenshot").hover(function(e){}, function(e){}) specifies the function to be executed when the mouse moves to the link and leaves the link.
5.this.t = this.title, assign the title attribute value of the link to the t attribute, where this is the link object pointing to the current mouse hover.
6.var c = (this.t != "") ? "
" + this.t : "", if this.t is not empty, that is, the title attribute value exists, then Inserts a newline character and concatenates the current header content, otherwise sets c to empty.
7.$("body").append("
"+ c +" p>"), add the image and related description to the body.
8.$("#screenshot").css("top",(e.pageY-xOffset)+"px").css("left",(e.pageX+yOffset)+"px") .fadeIn("fast"), sets the top and left attribute values of the p element, and displays it with a fade-in effect.
9.this.title=this.t, assign the title content to this.title. In fact, there is no problem without this sentence, it is a bit redundant.
10.$("#screenshot").remove(), remove the p element.
11.$("a.screenshot").mousemove(function(e){}), used to set the picture to follow when the mouse pointer moves.
12.$("#screenshot").css("top",(e.pageY-xOffset)+"px") .css("left",(e.pageX+yOffset)+"px") , setting the top and left attribute values of the p element can achieve the following effect.
2. Related reading:
1. The hover() function can be found in the chapter jQuery’s hover event .
2. For the append() function, please refer to the chapter jQuery’s append() method .
3. For the css() function, please refer to the chapter jQuery’s css() method .
4. For the pageY attribute, please refer to the chapter of jQuery’s event.pageY attribute.
5. For the fadeIn() function, please refer to the chapter jQuery’s fadeIn() method.
6. For the remove() function, please refer to the chapter jQuery’s remove() method .
7. For the mousemove event, please refer to the chapter jQuery’s mousemove event .
jquery实现多少秒后隐藏图片Apr 20, 2022 pm 05:33 PM实现方法：1、用“$("img").delay(毫秒数).fadeOut()”语句，delay()设置延迟秒数；2、用“setTimeout(function(){ $("img").hide(); },毫秒值);”语句，通过定时器来延迟。
axios与jquery的区别是什么Apr 20, 2022 pm 06:18 PM区别：1、axios是一个异步请求框架，用于封装底层的XMLHttpRequest，而jquery是一个JavaScript库，只是顺便封装了dom操作；2、axios是基于承诺对象的，可以用承诺对象中的方法，而jquery不基于承诺对象。
jquery怎么修改min-height样式Apr 20, 2022 pm 12:19 PM修改方法：1、用css()设置新样式，语法“$(元素).css("min-height","新值")”；2、用attr()，通过设置style属性来添加新样式，语法“$(元素).attr("style","min-height:新值")”。
jquery怎么在body中增加元素Apr 22, 2022 am 11:13 AM增加元素的方法：1、用append()，语法“$("body").append(新元素)”，可向body内部的末尾处增加元素；2、用prepend()，语法“$("body").prepend(新元素)”，可向body内部的开始处增加元素。
jquery怎么删除div内所有子元素Apr 21, 2022 pm 07:08 PM删除方法：1、用empty()，语法“$("div").empty();”，可删除所有子节点和内容；2、用children()和remove()，语法“$("div").children().remove();”，只删除子元素，不删除内容。
jquery中apply()方法怎么用Apr 24, 2022 pm 05:35 PM在jquery中，apply()方法用于改变this指向，使用另一个对象替换当前对象，是应用某一对象的一个方法，语法为“apply(thisobj,[argarray])”；参数argarray表示的是以数组的形式进行传递。
jquery怎么去掉只读属性Apr 20, 2022 pm 07:55 PM去掉方法：1、用“$(selector).removeAttr("readonly")”语句删除readonly属性；2、用“$(selector).attr("readonly",false)”将readonly属性的值设置为false。
jquery on()有几个参数Apr 21, 2022 am 11:29 AMon()方法有4个参数：1、第一个参数不可省略，规定要从被选元素添加的一个或多个事件或命名空间；2、第二个参数可省略，规定元素的事件处理程序；3、第三个参数可省略，规定传递到函数的额外数据；4、第四个参数可省略，规定当事件发生时运行的函数。
Hot AI Tools
Undresser.AI Undress
AI-powered app for creating realistic nude photos
AI Clothes Remover
Online AI tool for removing clothes from photos.
Undress AI Tool
Undress images for free
Clothoff.io
AI clothes remover
AI Hentai Generator
Generate AI Hentai for free.
Hot Article
Hot Tools
MinGW - Minimalist GNU for Windows
This project is in the process of being migrated to osdn.net/projects/mingw, you can continue to follow us there. MinGW: A native Windows port of the GNU Compiler Collection (GCC), freely distributable import libraries and header files for building native Windows applications; includes extensions to the MSVC runtime to support C99 functionality. All MinGW software can run on 64-bit Windows platforms.
DVWA
Damn Vulnerable Web App (DVWA) is a PHP/MySQL web application that is very vulnerable. Its main goals are to be an aid for security professionals to test their skills and tools in a legal environment, to help web developers better understand the process of securing web applications, and to help teachers/students teach/learn in a classroom environment Web application security. The goal of DVWA is to practice some of the most common web vulnerabilities through a simple and straightforward interface, with varying degrees of difficulty. Please note that this software
Safe Exam Browser
Safe Exam Browser is a secure browser environment for taking online exams securely. This software turns any computer into a secure workstation. It controls access to any utility and prevents students from using unauthorized resources.
SAP NetWeaver Server Adapter for Eclipse
Integrate Eclipse with SAP NetWeaver application server.
mPDF
mPDF is a PHP library that can generate PDF files from UTF-8 encoded HTML. The original author, Ian Back, wrote mPDF to output PDF files "on the fly" from his website and handle different languages. It is slower than original scripts like HTML2FPDF and produces larger files when using Unicode fonts, but supports CSS styles etc. and has a lot of enhancements. Supports almost all languages, including RTL (Arabic and Hebrew) and CJK (Chinese, Japanese and Korean). Supports nested block-level elements (such as P, DIV),
