


JS Album Effect Automatic Play [Local Integration]_Image Special Effects
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[Ctrl A select all Note: If you need to introduce external Js, you need to refresh to execute ] <script> function tM(Message) { $("testMessage").innerHTML=Message } function dR(topr) { document.write(topr) } function $(eleId) {return document.getElementById(eleId)} //预载图片 var imasrc=new Array("http://img.jb51.net/online/slide/10254068.jpg" ,"http://img.jb51.net/online/slide/10254629.jpg" ,"http://img.jb51.net/online/slide/10255187.jpg" ,"http://img.jb51.net/online/slide/10255626.jpg" ,"http://img.jb51.net/online/slide/10260076.jpg" ,"http://img.jb51.net/online/slide/10260471.jpg" ,"http://img.jb51.net/online/slide/10261022.jpg" ,"http://img.jb51.net/online/slide/10261479.jpg")//图片路径写入数组 var preIma=new Array() var dB=new Date() for (i=0;i < imasrc.length;i++)//预载所有图片 { preLoadImg(i) } function preLoadImg(imgIndex)//预载指定图片图片 { preIma[imgIndex]=new Image() preIma[imgIndex].imgReadyStatus=false preIma[imgIndex].imgIndex=imgIndex preIma[imgIndex].onload=imgLoad preIma[imgIndex].onerror=imgError preIma[imgIndex].onabort=imgAbort preIma[imgIndex].src=imasrc[imgIndex] } function imgLoad()//预载完成 { this.imgReadyStatus=true } function imgError()//预载失败 { preLoadImg(this.imgIndex) } function imgAbort()//预载取消 { preIma.splice(this.imgIndex,1) } var checkAgain function checkImgReadyStatus()//检索加载状态 { var imgReadyStatus=true var persent=0 var dE=new Date() for (i=0;i < preIma.length;i++) { if (!preIma[i].imgReadyStatus) {imgReadyStatus=false} else {persent++} } tM("完成:"+(persent/preIma.length*100).toFixed(2)+"%<br>载入:"+persent+"张图片<br>消耗时间:"+((dE-dB)/1000).toFixed(0)+"秒")//显示进度 if (imgReadyStatus) { $("photoContrl").style.display="block" autoPlay() clearTimeout(checkAgain) } else { checkAgain=setTimeout(checkImgReadyStatus,1000)//检索频率 } } checkImgReadyStatus() //幻灯片效果 var photoIndex=0//初始化图片索引 var opacity=10//初始化透明度 var direct="--"//初始化透明度矢量 var doPlay//定义播放 var doAutoPlay//定义自动播放 function prevPhoto(){play(-1)}//前翻 function nextPhoto(){play(1)}//后翻 function autoPlay()//自动播放 { if (doAutoPlay) { clearInterval(doAutoPlay) doAutoPlay=null $("pp").innerHTML="Play" } else { play(1) doAutoPlay=setInterval("play(1)",3000)//定义自动播放频率 $("pp").innerHTML="Pause" } } function stopPlay()//停止播放 { clearInterval(doAutoPlay) doAutoPlay=null photoIndex=0 play(0) $("pp").innerHTML="Play" } function play(act)//执行动作 { if (preIma.length!=0) { if (doPlay) {clearInterval(doPlay)} doPlay=setInterval(switchPhoto,10) photoIndex=(photoIndex+act+preIma.length)%preIma.length } } function switchPhoto()//切换照片 { eval("opacity"+direct) setOpa(opacity) if (opacity <= 1) { direct="++" $("photo").src=preIma[photoIndex].src } else if (opacity >= 10) { direct="--" clearInterval(doPlay) } } function setOpa(opacity)//改变透明度 { if ($("photo").style.filter!=null) {$("photo").style.filter="alpha(opacity="+opacity*10+")"} else {$("photo").style.opacity=opacity/10} } </script>

The power of the JavaScript framework lies in simplifying development, improving user experience and application performance. When choosing a framework, consider: 1. Project size and complexity, 2. Team experience, 3. Ecosystem and community support.

Introduction I know you may find it strange, what exactly does JavaScript, C and browser have to do? They seem to be unrelated, but in fact, they play a very important role in modern web development. Today we will discuss the close connection between these three. Through this article, you will learn how JavaScript runs in the browser, the role of C in the browser engine, and how they work together to drive rendering and interaction of web pages. We all know the relationship between JavaScript and browser. JavaScript is the core language of front-end development. It runs directly in the browser, making web pages vivid and interesting. Have you ever wondered why JavaScr

Node.js excels at efficient I/O, largely thanks to streams. Streams process data incrementally, avoiding memory overload—ideal for large files, network tasks, and real-time applications. Combining streams with TypeScript's type safety creates a powe

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.


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