JavaScript

javascript-Observer pattern (Publish/subscribe)The observer pattern, also called the Publish-subscribe pattern, defines a one-to-many relationship that allows multiple observer objects to listen to a Subject object at the same time, notifying all

This paper studies and organizes the course "JavaScript advanced" according to MU course network. Understanding the DOMThe Document Object Model DOM defines a standard way to access and manipulate HTML documents. The DOM renders an HTML

JavaScript is good at modifying DOM elements in a page, but using JavaScript usually only implements some simple features, such as the flip of a picture, a tab in a Web page, and so on. This article will show you how to implement drag-and-drop on

onload () and window.onload and $ (document) in body. the difference between ready (): 1, the first two indicate when the page loaded elements (including pictures and other information) performed after the operation, and both in various browsers

Find content that can be speeded upYou must first find out what pictures of you and HTML are loading slowly with your script speed, here are the methods:1. Firefox web-developer Toolbar2. Firebug Plugin3. octagate SitetimerCompress your code1. Run

The foreach extension method of the JavaScript arrays array, foreach, is one of the most commonly used array extension methods, equivalent to a parameterized loop array, which simply applies the incoming function on each element of the array, which

The technique of debugging is an essential skill in any technology development. Master a variety of debugging skills, must be able to work in a multiplier effect. For example, quickly locate problems, reduce the probability of failure, help analyze

Today again review the JS Foundation, found himself very slag, and then read the JS function Ah of the transmission, then JS in the end is passed by value or by reference? (I am a novice, if there is any wrong place, also ask the big God pointing

ONEHEAP focuses on the presentation of in-run JavaScript memory information, and visually restores the heapgraph to help understand V8 memory management. BackgroundMost of the data in JavaScript runs is stored in the heap, so another important

All variables have global scope, local variables have local scope (note that the parameters of the function are also local variables)1. In the function body, the local variable takes precedence over the global variable with the same name.My

Source: http://www.ido321.com/930.htmlPS: is the get style. Not set style. If no style value is set for the element. Returns the default value given by the browser. (Forum finishing)1, Element.style: Only can get the style value that is written in

How do you check for an undefined variable in javascript?In JavaScript null was an object. There ' s another value for things that don ' t exist, undefined. The DOM returns null for almost all cases where it fails to find some structure in the

The performance of JavaScript in the browser is especially important in the web2.0 era, and thousands of lines of JavaScript code will undoubtedly become a performance killer,When the lower version of the browser executes the JavaScript code,

1. Create with new objectThe simplest way to create a custom object is to create an instance of object and then add properties and methods to it, as shown below.var person = new Object ();p erson.name = "Nicholas";p erson.age = 29;person.job =

Fifth Chapter reference types　Objects are instances of a reference type, which is a data structure that organizes data and functionality together. Describes the properties and methods that a class of objects have.  An object is an instance of a

Js Method for Determining the operating system and browser of the mobile browser, js judgment Today, we will introduce how to use js to determine the mobile client platform and System Platform: Note that the above Code uses jquery. Jquery can be

Describes the role of jQuery's promise object in JavaScript asynchronous programming, jquerypromise Promise, which can be understood as a desire in Chinese, represents the final result of a single operation. A Promise has three statuses: unfulfilled

Analysis of various methods for creating objects in javascript, analysis of javascript Recently I was reading javascript advanced programming (version 2) Create an object in javascript • Factory Model • Constructor Mode • Prototype • Constructor and

JQuery implements simple scrolling animation effects and jquery scrolling Animation The idea of animation is very simple. Click an element on the page and scroll to the specified position. The following describes my research results of Baidu in

My favorite web pages, favorite Web pages Build a PHP development environment in Windows-pharen-blog Park Roán Cortés Pizza Amore! | Playground from ZURB CSS multi-browser compatibility problems and solutions-v. e. n. u. s-blog CSS production