JavaScript

Copy Code code as follows: /* * A JavaScript object is a set of properties (methods) * In this language, if the variable or method name does not conform to the declaration specification, * You must use the square brackets "[]" to refer to

Parameters type Description El Element Required, for page elements Begin Number Required, starting position Change Number Required, the distance to be moved

Copy Code code as follows: function getElementsByTagName (node, tagName) { var elements = [], i = 0, Anytag = TagName = = "*", next = Node.firstchild; while (node = next) { if (anytag? node.nodetype = = = 1:node.nodename = = tagName)

JavaScript has been 16 years since its birth in 1995, and now countless web pages around the world rely on her to complete a variety of key tasks, JavaScript in the Tiobe published the list of programming languages in the 8th place, followed by C #,

The Problem:scripts block downloads Let ' s-take a look at what the problem are with the script downloads. The thing is this before fully downloading and parsing a script, the browser can ' t tell what's in it. It may contain document.write() calls

The difficulty of writing this game is much higher than before. This time I used the JS inheritance and design mode of the factory model, is also a breakthrough ... The general idea of the game design:1, player class player: A person can move

The trim function for JavaScript is used under Firefox without problems In Firefox under this use no problem, but in IE under the errorThen we can modify String.prototype.trim=function () {return this.replace (^\s*) | ( \s*$)/g,

Some time ago read "JavaScript Advanced program Design" finally found a little introduction: \xnn a character (n:0-f) expressed in hexadecimal code nn \UNNN A Unicode character (n:0-f) in hexadecimal code Today because one of their own needs to

isNaN function Returns a Boolean value that indicates whether the supplied value is a reserved value NaN (not a number). NaN is not a number isNaN (NumValue) The required NumValue parameter is the value to check for NAN. Description If the

Most of the time you need to use the text box to limit the number of input, tried many methods, are not ideal, so decided to achieve one to play. A method that has been used before To control only numbers by onkeydown events: Copy Code code

Objective Uncle Bob proposed and carried forward the five principles of S.O.L.I.D for better object-oriented programming, the Five Principles are: The single Responsibility principle (SRP for sole responsibility) The open/closed principle (opening

A single plus sign as an operator has three functions in JavaScript. It can represent string concatenation, for example: Copy Code code as follows: var str = ' Hello ' + ' world! '; Or a unary operator that represents a

This means that there will be an appropriate event bubbling, and the browser will execute the assigned event handler. This ability is useful when testing Web applications, providing a way to simulate specific events in the DOM 3 specification, IE9

Preface In the last article, we'll add some common methods to the matrix, which will explain the virtual edge of the image. Virtual Edge The virtual edge is to add an edge to the image according to a certain mapping relationship. So what's the

Often use Google's friends must be vivid memories of Google Calendar control it, then we also to achieve a, although the function and effect is not comparable, but the important thing is the process of implementation. here is the HTML structure to

One of the challenges with working with HTML DOM documents is that JavaScript can be executed before the DOM is fully loaded, which can cause a lot of potential problems for your code. The rendering and operation order of the browser is outlined in

Today in Rainweb's blog, saw this very good article, feel very necessary to share out, I believe that we read this article carefully, the understanding of JS scope will rise to a new level.Preface: The variable scope of JavaScript is a problem that

If you redefine the classes in the previous example in a prototype way, they will change to the following form: Copy Code code as follows: function ClassA () { } ClassA.prototype.color = "Blue";ClassA.prototype.sayColor =

The first two talk I told you how to make the characters move, so today we will see how to achieve The imitation of "kingdoms Cao Chuan" character situation dialogue. The specific links I write are below. First, the preface As you can remember,

Let's take a screenshot first. The mouse moves to the corresponding classification, the following red small triangle will automatically follow, slow to follow. No matter how many are available. JavaScript code: Copy Code code as follows: