JavaScript

Transferred from: http://blog.csdn.net/mygis2005/article/details/7375419JavaScript is a weakly typed language, and variable names, operators, and method names are case-sensitive.1. Variable definitionIn JavaScript, you use var to define any type of

The key to understanding JavaScript's closure is to figure out three things1. Variable ScopeInside the word function, you can access fields outside the function and vice versa.1 var n=999; 2 3 function F1 () {4 alert (n); 5 }67// 999 　　 　　1

function properties, methods and constructors, function propertiesA function is a special object in JS that can have properties.Funcation.length Property: Represents the length of the formal parameter, read-only property, not allowed to

Advanced Object-Oriented —————————————————————— –在JS源码中，系统对象也是基于原型的程序，尽量不要去添加和修改系统对象的方法Packaging Object —————————————————————— –基本类型都有自己对应的包装对象比如String Number Boolean基本类型会找到对应的包装对象类型，然后包装对象把所有的属性方法给了基本类型，然后包装对象消失例如 str‘abc‘; str10;

The following method shows how to delete a cookie key-value pair with JavaScript on the client browser.//The method of deleting a cookie using JavaScript, which passes in the name of the cookie to be deletedfunctionRemovecookie (cookiename)

　What is a higher order function?　　A higher order function is a function that satisfies at least one of the following conditions:1. Functions can be passed as parameters2. function can be output as return value　　　　1. The function is passed as a

Window.event.srcElement and Window.event.target are all elements that point to the triggering event and what kind of property it is.Srcelement is an event initialization target HTML element object reference because the event bubbles through the

One, match numbers and strings Integer or decimal: ^[0-9]+\. {0,1} [0-9] {0,2}$ Only numbers can be entered: "^[0-9]*$". Only n digits can be entered: "^\d{n}$". Only numbers with at least n digits can be entered: "^\d{n,}$". You can

first, the objectvar obj = {};obj[true] = "foo"; obj[3] = "bar"; obj[obj] = "Baz"; obj["true"];obj["3"];obj["[Object Object]";second, arrays are objectsvar ary = ["foo", "bar"];ary.baz = "baz"; ary.length;//3ary.baz;/* if you try to add a property

Development in the web often comes across processing JSON strings, typically in two ways:One is the JSON string to the object, usually by the background JSON string from the foreground JS to get the object, this situation can callThe eval (' (' +

JQuery implements the hover synthesis event method, jqueryhover This example describes how to implement hover merging events using jQuery. Share it with you for your reference. The details are as follows: JQuery hover merges events and uses the

JavaScript functional programming This article records some of the things I have learned in functional learning, deepen my memory and record it, so that I can easily review it later. I recently saw the book JavaScript functional programming, which

Jquery plug-in jquery. beforeafter. js allows you to drag and drop separators between left and right to compare images, This article describes how to use jquery plug-in jquery. beforeafter. js to drag and drop separators between left and right to

JQuery implements a stylish and beautiful pop-up dialog box instance, and jquery implements a fashion instance This example describes how jQuery implements a stylish pop-up dialog box. Share it with you for your reference. The details are as follows:

Example of Div window vibration effect implemented by jQuery and jquerydiv window This article describes the Div window vibration effect implemented by jQuery. Share it with you for your reference. The details are as follows: This is a jQuery window

HTML5! Juvenile, HTML5! Juvenile  1. To enable IE9 or lower ie browsers to support html5 labels, you must first introduce the famous code using the conditional annotation method in the document header. 123 This piece of

JS creates a TXT text file in the specified path based on FileSystemObject. This document describes how to create a TXT text file in a specified path based on FileSystemObject in JS. Share it with you for your reference. The details are as follows:

JS implementation generates a ring instance that will become larger and smaller, and js Ring This article describes how to generate a ring that will become larger and smaller in JavaScript. Share it with you for your reference. The details are as

Js to draw circles and rectangles, js to draw rectangles This article describes how to draw circles and rectangles in JavaScript. Share it with you for your reference. The details are as follows: Here, JavaScript is used to draw circles and

JS: special effect code for Rotating Random Number lottery, js Random Number Everyone has ever played a lottery game or dream of winning a grand prize, but have you ever wondered how the lottery game works? Today I will share with you a JS special