


js realizes the dynamic transformation and display effect of input box text_javascript skills
The example in this article describes the dynamic transformation display effect of input box text using js. Share it with everyone for your reference. The details are as follows:
Here is a demonstration of js implementing the special display effect in the INPUT box. Some text is slowly displayed alternately, and finally the complete text is displayed. The text that needs to be displayed is saved in an array in advance, and the display is called in sequence. It is interesting.
The screenshot of the running effect is as follows:
The online demo address is as follows:
http://demo.jb51.net/js/2015/js-input-txt-rand-show-codes/
The specific code is as follows:
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <meta http-equiv="Content-Type" content="text/html; charset=gb2312" /> <title>input文字特殊显示</title> </head> <body bgcolor="#ffffff" onLoad="startQuote();"> <SCRIPT LANGUAGE="JavaScript"> <!-- Begin var quoteStr; var quoteNum; var quoteDis; var quoteLen; var quoteLoc; var quotePic; var quoteMax; var numQuote; function funcQuote() { this[0] = "有没有想过在页面中不同地方出现不同的鼠标形状,这个就是了"; this[1] = "鼠标上出现蜘蛛网一样的东东,放到文字链接上后会出现变化"; this[2] = "鼠标上面的晃动小球,效果非常新颖,你一定会喜欢的,酷极了"; this[3] = "鼠标右键入的弹出导航条,导航条上有背景变化,很有新意的,酷"; this[4] = "双击鼠标页面向下滚动,单击鼠标页面停止滚动,很实用"; this[5] = "鼠标周围的旋转宣传文字,又是一种很酷的效果,一定不可错过"; this[6] = "所鼠标放在链接上后在状态栏显示一大串的字符,可以用来隐藏链接."; this[7] = "在页面上你用鼠标选中什么,就会弹出警告框显示选中的内容"; this[8] = "在页面上点中鼠标后随意拖动,会在页面上显示鼠标运动的轨迹"; this[9] = "围着鼠标一圈的宣传文字,随鼠标移动,并且自身也在旋转,酷"; this[10] = "跟随鼠标的半透明图片,看上去可是很酷的,可以做阴影效果."; } function getQuote() { quoteLen = 0; quoteLoc = 0; quoteNum = Math.floor(Math.random() * numQuote); quoteStr = makeQuote[quoteNum]; quoteLen = quoteStr.length; padQuote(); } function disQuote() { quoteLoc = quoteLoc + 1; if (quoteLoc > quoteMax) { getQuote(); } quoteDis = quoteStr.substring(0, quoteLoc); for (var i = quoteLoc; i < quoteMax; i++){ var charone; charone = quoteStr.substring(i, i + 1); var rdnum; rdnum = Math.floor(Math.random() * 57) if (charone != " "){ quoteDis = "" + quoteDis + quotePic.substring(rdnum, rdnum + 1); } else { quoteDis = "" + quoteDis + " "; } } } function padQuote () { var spacePad = quoteMax - quoteStr.length; var frontPad = Math.floor(spacePad / 2); for (var i = 0; i < frontPad; i++) { quoteStr = " " + quoteStr; } for (var i = quoteStr.length; i < quoteMax; i++) { quoteStr= "" + quoteStr + " "; } } function loopQuote() { document.RandomText.box1.value=quoteDis; disQuote(); setTimeout ("loopQuote();", 100); } function startQuote() { quoteStr = ""; quoteNum = 0; quoteDis = ""; quoteLen = 0; quoteLoc = 0; quotePic = "abcdefghjkmnopqrstuvwxyzABCEDEFGHJKLMNOPQRSTUVXYZ234567890"; quoteMax = 50; numQuote = 11; makeQuote = new funcQuote(); getQuote(); disQuote(); loopQuote(); } // End --> </script> <form name="RandomText"> <input type="text" size="70" name="box1"> </form> </body> </html>
I hope this article will be helpful to everyone’s JavaScript programming design.

The main uses of JavaScript in web development include client interaction, form verification and asynchronous communication. 1) Dynamic content update and user interaction through DOM operations; 2) Client verification is carried out before the user submits data to improve the user experience; 3) Refreshless communication with the server is achieved through AJAX technology.

Understanding how JavaScript engine works internally is important to developers because it helps write more efficient code and understand performance bottlenecks and optimization strategies. 1) The engine's workflow includes three stages: parsing, compiling and execution; 2) During the execution process, the engine will perform dynamic optimization, such as inline cache and hidden classes; 3) Best practices include avoiding global variables, optimizing loops, using const and lets, and avoiding excessive use of closures.

Python is more suitable for beginners, with a smooth learning curve and concise syntax; JavaScript is suitable for front-end development, with a steep learning curve and flexible syntax. 1. Python syntax is intuitive and suitable for data science and back-end development. 2. JavaScript is flexible and widely used in front-end and server-side programming.

Python and JavaScript have their own advantages and disadvantages in terms of community, libraries and resources. 1) The Python community is friendly and suitable for beginners, but the front-end development resources are not as rich as JavaScript. 2) Python is powerful in data science and machine learning libraries, while JavaScript is better in front-end development libraries and frameworks. 3) Both have rich learning resources, but Python is suitable for starting with official documents, while JavaScript is better with MDNWebDocs. The choice should be based on project needs and personal interests.

The shift from C/C to JavaScript requires adapting to dynamic typing, garbage collection and asynchronous programming. 1) C/C is a statically typed language that requires manual memory management, while JavaScript is dynamically typed and garbage collection is automatically processed. 2) C/C needs to be compiled into machine code, while JavaScript is an interpreted language. 3) JavaScript introduces concepts such as closures, prototype chains and Promise, which enhances flexibility and asynchronous programming capabilities.

Different JavaScript engines have different effects when parsing and executing JavaScript code, because the implementation principles and optimization strategies of each engine differ. 1. Lexical analysis: convert source code into lexical unit. 2. Grammar analysis: Generate an abstract syntax tree. 3. Optimization and compilation: Generate machine code through the JIT compiler. 4. Execute: Run the machine code. V8 engine optimizes through instant compilation and hidden class, SpiderMonkey uses a type inference system, resulting in different performance performance on the same code.

JavaScript's applications in the real world include server-side programming, mobile application development and Internet of Things control: 1. Server-side programming is realized through Node.js, suitable for high concurrent request processing. 2. Mobile application development is carried out through ReactNative and supports cross-platform deployment. 3. Used for IoT device control through Johnny-Five library, suitable for hardware interaction.

I built a functional multi-tenant SaaS application (an EdTech app) with your everyday tech tool and you can do the same. First, what’s a multi-tenant SaaS application? Multi-tenant SaaS applications let you serve multiple customers from a sing


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