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JavaScript coordinates: event.x, Event.clientx, Event.offsetx, Event.screenx usage

Label:clientX 设置或获取鼠标指针位置相对于窗口客户区域的 x 坐标,其中客户区域不包括窗口自身的控件和滚动条。clientY 设置或获取鼠标指针位置相对于窗口客户区域的 y 坐标,其中客户区域不包括窗口自身的控件和滚动条。offsetX 设置或获取鼠标指针位置相对于触发事件的对象的 x 坐标。offsetY 设置或获取鼠标指针位置相对于触发事件的对象的 y 坐标。screenX 设置或获取获取鼠标指针位置相对于用户屏幕的 x 坐标。screenY

JavaScript must know: Surface Object programming

Label:The core concept of surface Object Programming Technology: encapsulation, inheritance, polymorphism; In some major high-level programming languages, such as: c#,vb.net,java,php, etc. are easy to implement, and if you want to implement polygon

Object-oriented programming of JavaScript

Label:The core concept of surface Object Programming Technology: encapsulation, inheritance, polymorphism; In some major high-level programming languages, such as: c#,vb.net,java,php, etc. are easy to implement, and if you want to implement polygon

JavaScript gets the current time

Label: //时间设置<script type="text/javascript"><!--varmyDate = newDate();    myDate.getYear();      //获取当前年份(2位)    myDate.getFullYear();

JavaScript closures Demo "Go"

Label:Article originated from http://www.cnblogs.com/snandy/archive/2011/03/01/1967628.htmlA netizen asked a question, such as the next HTML, why click All the paragraph p output is 5, rather than alert out the corresponding 0,1,2,3,4. 1

The pre-loading of JavaScript from the definition of function

Tag: com ring uses targe demo1 x11 var to call itsThere are two ways to define a function in javascript: 12 functionftn(){} // 第一种varftn = function(){} // 第二种 Some people say that these two kinds of writing are

Three ways JavaScript determines whether a picture is loaded (go)

Label:First, the Load event 12345678910111213141516 <!DOCTYPE HTML><html><head>    <meta charset="utf-8">    <title>img - load event</title></head><

Apply, call, bind in JavaScript

Tags: Context environment Elf string its uses the tar ring to dynamically change GetxApply, call, bind, and list some of their magical refinement to deepen the memory.Apply, callIn JavaScript, call and apply are meant to change the context in which

JavaScript, 5 ways to call a function

Label:Let's start by creating a simple function that will be used in the next article, which simply returns the current value of this and two supplied arguments.<script type="text/javascript">functionmakeArray(arg1,

5 ways to call functions from JavaScript

Tags: str function Racket Mode function use Method learning prototypeAgain and again, I found that the bug-coded JavaScript code was caused by the lack of a real understanding of how JavaScript functions work (by The way, Many of those codes were

Problems with in loops and arrays in JavaScript

Label:This article by Bole Online-elviskang translation, into the forest School draft. without permission, no reprint!English Source: adripofjavascript.com. Welcome to join the translation team.The for...in loop of JavaScript is used to iterate over

Deep understanding of JavaScript variable scopes

Label:Before learning about the variable scope of JavaScript, we should make a few clear points:A, the variable scope of JavaScript is based on its unique scope chain.b, JavaScript does not have a block-level scope.c, the variables declared in the

JavaScript Project Building Tools Grunt Practice: Install and create project frameworks

Label:Grunt is a task-based JavaScript Project Command-line build tool that runs on the node. JS platform. Grunt can quickly create projects from templates, merge, compress and validate CSS & JS files, run unit tests, and start a static server.  

The best JavaScript API design Tips

Label:Design is a very common concept that is generally understood to form a plan or framework for something that will be done beforehand. (Oxford English Dictionary), design is a piece of art, system, hardware or more things woven into a line.

JavaScript Concise tutorial (3) array

Tags: Modify medium border highlight cin pass Hello search substringThe array of JavaScript can contain any data type, and each element is accessed through an index.To get the length of the array, directly access the Long property:[JavaScript]Plain

JavaScript Development Advanced: Understanding JavaScript scopes and scope chains

Tags: err Error blog Table call ETH unified NTB X11Scopes are one of the most important concepts of JavaScript, and to learn JavaScript you need to understand how JavaScript scopes and scope chains work. Today's article provides a simple

JavaScript Development Advanced: Understanding JavaScript scopes and scope chains

Label:Scopes are one of the most important concepts of JavaScript, and to learn JavaScript you need to understand how JavaScript scopes and scope chains work. Today's article provides a simple introduction to JavaScript scopes and scope chains,

JavaScript Development Advanced: Understanding JavaScript scopes and scope chains

Label:Scopes are one of the most important concepts of JavaScript, and to learn JavaScript you need to understand how JavaScript scopes and scope chains work. Today's article provides a simple introduction to JavaScript scopes and scope chains,

JavaScript Development Advanced: Understanding JavaScript scopes and scope chains

Label:Scopes are one of the most important concepts of JavaScript, and to learn JavaScript you need to understand how JavaScript scopes and scope chains work. Today's article provides a simple introduction to JavaScript scopes and scope chains,

[Turn] 5 JavaScript face questions

Label:Issue 1: ClosuresConsider the following code: 123456 var nodes = document.getElementsByTagName(‘button‘);for (var i = 0; i < nodes.length; i++) {   nodes[i].addEventListener(‘click‘, function()

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