JavaScript

JS in the implementation of the letter case conversion is mainly used in four JS functions: 1.toLocaleUpperCase2.toUpperCase3.toLocaleLowerCase4.toLowerCase The following is a simple analysis of these four JS functions for case conversion.

For example, this example: Copy Code code as follows: var arr = ["One", "two", "Three"]; var arrto = arr; ARRTO[1] = "Test"; Document.writeln ("Original value of the array:" + arr + "");//export: Original value of the array:

This last six months as a Java programmer, I write JavaScript code faster than the Java code, some time ago is to a bank to do a teller control system, in the cabinet authorization this function, due to the authority of the teller need to consider

This game is mainly designed to two points: The first is the winning operation. Because stone scissors are recycled.Stone kills Scissors.Scissors to kill clothThe cloth kills the stoneStone kills Scissors.。。。According to the above characteristics

Requirements Analysis: In doing upload pictures, if you do not limit the size of the upload picture, the consequences are very serious. So how can we solve a thorny problem? There are two ways of doing this:1) Background processing: That is, Ajax

In this paper, we analyze the method that JavaScript can not be used in the trim function under IE, which has some reference value for the front design of the web. The specific analysis is as follows: First, the JavaScript trim function has no

1.json Spin String Copy Code code as follows: function Json2str (o) { var arr = []; var FMT = function (s) { if (typeof s = = ' object ' && s!= null) return json2str (s); Return/^ (String|number) $/.test (typeof s)? "" + S +

As you may know, the execution environment for a JavaScript language is "single-threaded" (single thread). The so-called "single thread" means that only one task can be completed at a time. If you have more than one task, you must queue, the

Today, when I wrote JS, I met a Trap (DA) Trap (Keng)Questions about Html/xml NodesIt is said that nextsibling in IE will not return text nodes, and Chrome or Firefox will return text nodes ...This is a serious problem with my job.Search on the

Common types of object creation patterns Create using the New keywordThe most basic way to create an object is to say the same as most other languages: no object, you new one! var GF = new Object (); Gf.name = "Tangwei"; Gf.bar = "C +

A GUID (global uniform identifier) is a number that is generated on a single machine and is guaranteed to be unique to all machines in the same space-time. Typically, the platform provides an API to generate GUIDs. The generation algorithm is

This article describes the JavaScript set up two consecutive times to click the button time interval method, share for everyone to reference. The implementation methods are as follows: Many times we in the actual application, may not want the

This article describes the native JavaScript implementation to get the specified elements of all descendant elements of the method, shared for everyone to reference. The implementation methods are as follows: The usual way of looping recursion is a

Recently looking at Express, eyeful look, everywhere is using function as a parameter of the callback function. If this concept is not understood, Nodejs, express code will be a mess. Like what: Copy Code code as follows: App.use

JavaScript print page Specifies the div area principle: Use window.open () to open a new page (window) in the browser, and use Window.document.write () to write the contents of the specified Div area to the new window document. Document.close ()

I am engaged in PHP, let me think of Copy Code code as follows: Function.prototype.heredoc = function () { Use the annotation of a function to store the string without escaping. var _str = this.tostring (), S_pos = _str.indexof ("/*") +2

In JavaScript, VAR is used to declare variables, but this syntax is not strictly required and is often modified so that we can use a variable directly without declaring it with Var. Copy Code code as follows: var x = "XX"; y =

Accelerated motion, that is, an object moving faster and faster, deceleration movement, that is, an object moving faster and slower. Now using JavaScript to simulate these two effects, the principle is to use setinterval or settimeout to dynamically

Image upload Preview function is mainly used in front of the picture upload a preview of the effect, the current mainstream methods are mainly js,jquery and flash implementation, but we will generally use JS to achieve the image upload preview

From today's chapter, I will focus on the content of Kitjs event management, as far as possible in plain language to expose the mainstream JS framework is how to achieve their own independent event management functions. (i) Ordinary DOM events We