JavaScript

1. Sparse arraysCreating a sparse array of specified lengths is simple: Copy Code code as follows: > var a = new Array (3); > A [ , , ] > A.length 3 > A[0] Undefined When you traverse it, you will find that it

As follows Copy Code code as follows: function person (name, age) { THIS.name = name; This.age = age; } var p = new person (' Lily ', 20); It's strange to discover that some library code creates regular objects in a

Introduced In this article, we will discuss more details that are directly related to the execution context. The subject of the discussion is the this keyword. Practice has proved that this topic is difficult, and the determination of this in

2.7 Type Conversions 1. Convert to String All objects have a ToString () method that can be converted to a string, note the ToString () method of the number type, which has two modes, the default mode and the base mode, and the default mode ToString

It's easy to make floating ads if you have a certain JavaScript base. Directly on the code: Copy Code code as follows: Untitled Document Main points： The above code to use

A scalable vector graphic (Scalable vector graphics,svg) is a graphical format for describing two-dimensional vector graphics based on Extensible Markup Language (XML). SVG is set up by the consortium and is an open standard. Another SVG or static

Brief introduction Module mode is a very common pattern in JavaScript programming, which is generally known as basic usage, and this article tries to give you more advanced usage of the pattern. First, let's look at the basic features of module mode:

In our daily web development and Web application development, we often need to effectively invoke the JavaScript processing date and time format related functions, in JavaScript already contains some of the most basic built-in processing methods. Of

a) mouse events 　　 Mouse events may be the most commonly used event in a Web page, because the mouse is the most commonly used navigation device, and 9 mouse events are defined on the DOM3 level event, respectively: Click: When the user clicks on

We call it the . It can return user IP and address, such as: var ipdata = new Array ("220.181.108.85", "", "Beijing", ""); We can use Ipdata[0] as a user IP. But recently did not know what is going on Tencent, this address is invalid, prompted

As shown below: Copy Code code as follows: var person = new Object (); Person.name = "Nicholas"; Person.age = "29" Person.job = "Software Engineer"; Person.sayname = function () { alert (this.name); }; Person.sayname (); The

First look at the English interpretation of these two words (from Youdao dictionary). First property: Copy Code code as follows: property [' Prɔpəti] N. Properties, properties, property, ownership English-English

L ECMAScript, there is ECMA-262 definition, clear JavaScript this language rules and conventions, like for the beginning of a game specified game rules, specifications, conventions. L DOM: Methods and interfaces that provide access to and manipulate

From John Resig's early writings, it was roughly translated to make a memo. Happily, I think I can finally say, "Now, the getters and setters use of JavaScript is very extensive, and it is closely related to the immediate interests of every

Online Demo We also remember that we have introduced the form to verify the jquery plug-in Jquery.validationengine bar, use this plug-in you do not need to write any one line of JS code can generate a powerful form verification function. Isn't it

Copy Code code as follows: function Copytoexcel (tableid) { Control button var btn = document.getElementById ("copy"); Btn.setattribute ("Disabled", "true"); Btn.setattribute ("value", "process ..."); var curtbl =

1. convert using a Boolean object Copy Code code as follows: var num123 = 123, str = ' abc ', o = {name: ' Test '}, NUM0 = 0; num123 = Boolean (num123); True NUM0 = Boolean (NUM0); False str = Boolean (str); True o = Boolean (o); True

Use it you can easily achieve similar to Google, Baidu map of the drag effect, to show the big picture when using Sprymap is the best. Sprymap customization is also very high, through the parameters can set the starting position of the picture, CSS

Full arrangement is a time complexity of: O (n!) The algorithm, the first two days to give lectures to students, inadvertently think of this problem, come back summed up, can be solved by 7 kinds of algorithms, which the dynamic cycle similar

javascript: Declaration of variablesHere are a few ways to declare variables Copy Code code as follows: var value; var value,value1,value2;//declares multiple variables at the same time, but the values of these variables are all