


jquery implements the method of sliding the mouse over the small picture to view the large picture_jquery
The example in this article describes the method of using jquery to slide the mouse over a small image to view a large image. Share it with everyone for your reference. The specific implementation method is as follows:
1. CSS part:
<style type="text/css"> ul{ list-style:none; } li{ float:left; margin-left:10px; } img{ border:#CCCCCC solid 1px; } #max{ position:absolute; display:none; /*隐藏层*/ } </style>
2. HTML part:
苹果产品列表: <ul> <li><a href="images/apple_1_bigger.jpg"><img src="/static/imghwm/default1.png" data-src="images/apple_1.jpg" class="lazy" / alt="jquery implements the method of sliding the mouse over the small picture to view the large picture_jquery" ></a> <li><a href="images/apple_2_bigger.jpg"><img src="/static/imghwm/default1.png" data-src="images/apple_2.jpg" class="lazy" / alt="jquery implements the method of sliding the mouse over the small picture to view the large picture_jquery" ></a> <li><a href="images/apple_3_bigger.jpg"><img src="/static/imghwm/default1.png" data-src="images/apple_3.jpg" class="lazy" / alt="jquery implements the method of sliding the mouse over the small picture to view the large picture_jquery" ></a> <li><a href="images/apple_4_bigger.jpg"><img src="/static/imghwm/default1.png" data-src="images/apple_4.jpg" class="lazy" / alt="jquery implements the method of sliding the mouse over the small picture to view the large picture_jquery" ></a> </ul>
3. javascript part:
<script> $(document).ready(function(){ //e 事件对象,可以通过该事件对象获取事件的参数 e.pageX - X轴,距浏览器的左边的距离 e.pageY - y轴,距浏览器的顶端的距离 $("a").mouseover(function(e){ //鼠标移上去 向body追加大图元素 //大图的路径:当前连接的href属性值为大图的路径 var $imgSrc = $(this).attr("href"); var $maxImg ="<div id='max'><img src='"+$imgSrc+"' alt="jquery implements the method of sliding the mouse over the small picture to view the large picture_jquery" ></div>"; //在body中添加元素 $("body").append($maxImg); //设置层的top和left坐标,并动画显示层 $("#max").css("top", e.pageY+20).css("left",e.pageX+10).show('slow'); }).mouseout(function(){ //鼠标移开删除大图所在的层 $("#max").remove(); }).mousemove(function(e){ //鼠标移动时改变大图所在的层的坐标 $("#max").css("top", e.pageY+20).css("left",e.pageX+10); }); }); </script>
I hope this article will be helpful to everyone’s jquery programming design.

The differences in performance and efficiency between Python and JavaScript are mainly reflected in: 1) As an interpreted language, Python runs slowly but has high development efficiency and is suitable for rapid prototype development; 2) JavaScript is limited to single thread in the browser, but multi-threading and asynchronous I/O can be used to improve performance in Node.js, and both have advantages in actual projects.

JavaScript originated in 1995 and was created by Brandon Ike, and realized the language into C. 1.C language provides high performance and system-level programming capabilities for JavaScript. 2. JavaScript's memory management and performance optimization rely on C language. 3. The cross-platform feature of C language helps JavaScript run efficiently on different operating systems.

JavaScript runs in browsers and Node.js environments and relies on the JavaScript engine to parse and execute code. 1) Generate abstract syntax tree (AST) in the parsing stage; 2) convert AST into bytecode or machine code in the compilation stage; 3) execute the compiled code in the execution stage.

The future trends of Python and JavaScript include: 1. Python will consolidate its position in the fields of scientific computing and AI, 2. JavaScript will promote the development of web technology, 3. Cross-platform development will become a hot topic, and 4. Performance optimization will be the focus. Both will continue to expand application scenarios in their respective fields and make more breakthroughs in performance.

Both Python and JavaScript's choices in development environments are important. 1) Python's development environment includes PyCharm, JupyterNotebook and Anaconda, which are suitable for data science and rapid prototyping. 2) The development environment of JavaScript includes Node.js, VSCode and Webpack, which are suitable for front-end and back-end development. Choosing the right tools according to project needs can improve development efficiency and project success rate.

Yes, the engine core of JavaScript is written in C. 1) The C language provides efficient performance and underlying control, which is suitable for the development of JavaScript engine. 2) Taking the V8 engine as an example, its core is written in C, combining the efficiency and object-oriented characteristics of C. 3) The working principle of the JavaScript engine includes parsing, compiling and execution, and the C language plays a key role in these processes.

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C and JavaScript achieve interoperability through WebAssembly. 1) C code is compiled into WebAssembly module and introduced into JavaScript environment to enhance computing power. 2) In game development, C handles physics engines and graphics rendering, and JavaScript is responsible for game logic and user interface.


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