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HTML5 added a few document character set properties.Document.charset: Represents the actual character set used by the document.Document.defaultcharset: Represents the default character set, which is related to the browser and operating system settings.Assuming that the document does not use the default character set, Document.charset and Document.defaultcharset may be different.Set the document character set: However, you can change this value by using the Document.charset = "UTF8";

Before object.is, we compare values using the two equal sign "= =" or the three equal sign "= =", the three equals is more rigorous, as long as the comparison of the two types of different immediately return false. In addition, there is and only one value is not equal to itself, it is Nan Now ES6 added a object.is, let comparison operation of the river is more chaotic. In most cases object.is is equivalent to "= =", as follows 1 = = 1//True object.is (1, 1)//True ' a ' = = = = ' A

First look at the effect chart, the effect is relatively simple: Specific code: JavaScript code Determine if the leap year function isleapyear (year) {if (year%400==0) | | (year%4==0 year%100!=0)) {return true; return false; }//Calendar function Createcalendar (year,month,date) {var d=new date (); if (!year | | year

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Put a good mature ajs 3.19 do not learn, why to touch the AJS 4.2? Gentlemen, I like the tender--yuck yuck. Gentlemen, I like 3D? New things will replace old things not ~ ArcGIS API for JavaScript 4.2 overviewAJS 4.2, ArcGIS API for JavaScript 4.2, is a product developed by ESRI in the United States for the Webgis market using

BKJIA quick translation] One of IBM's current goals is to make it easier for developers to write JavaScript-based user interfaces without using the JavaScript language itself. The company launched Enterprise Generation LanguageEGL community edition CE), an Eclipse-based development tool designed to simplify JavaScript development. Although egl ce is relatively

that is not defined using var, the variable will become a global variable. In general, we should avoid using variables not defined by var, mainly because it will affect the execution efficiency of the program, because the speed of accessing global variables is much slower than that of local variables. However, this method ensures that our variables must be global variables. In addition, to ensure speed, when using global variables, we can use var to define a local variable, and then assign it t

In addition to changes in the interface, DreamWeaver CS4 as an important milestone, there are many updates, such as:* Code hints for Ajax and JavaScript frameworks* Adobe Incontext Editing* HTML Data set* subversion® Integration* CSS best practices, and more can view the official Fetures page. I'm here to introduce you to some of the new features of JavaScript.is in the official download Dreamweaver CS4 pre

Javascript is an indispensable part of web development and design. Whether it is a simple Web page or a professional site, or whether you are a master or a cainiao, the Javascript library is becoming more and more powerful, I can do a lot of complicated work, but at the same time, people feel at a loss in front of many JavaScript libraries. In this article, we wi

Today, we are excited to release a new version of the flow's delicacy, a JavaScript static type checker. Flow adds static type checking for JavaScript to improve development efficiency and code quality. More specifically, the benefits of static type checking, like early error checking, help you find bugs that can only be discovered at runtime, and code IntelliSen

Class1 () { Private field var x = "I ' m a private variable!"; Private method function Method1 () { alert (x); alert (this.x); } var method2 = method; public field this.x = "I ' m a object variable!"; Public method This.method1 = function () { alert (x); alert (this.x); } This.method2 = method; Constructor { This.method1 (); I ' m a private variable! I ' m A object variable! THIS.METHOD2 (); I ' m a global variable! I ' m A object variable! Method1 (); I ' m a private var

variables. However, this method ensures that our variables must be global variables. In addition, to ensure speed, when using global variables, we can use VaR to define a local variable, and then assign it to the global variable to obtain a local reference of the global variable. 1.2 variable type No variable defined. The type is undefined. The variable value can be a function. A function can act as a class in JavaScript. 1.3 variable scope Variable

variables.However, this method ensures that our variables must be global variables.In addition, to ensure speed, when using global variables, we can use var to define a local variable, and then assign it to the global variable to obtain a local reference of the global variable.1.2 variable typeNo variable defined. The type is undefined.The variable value can be a function.A function can act as a class in JavaScript.1.3 variable scopeVariable scope re