define

Ways to define functions There are three main ways to define a function: Functions Declaration (Function Declaration)Functional expression function Expression)New function constructor Among them, function declarations and function expressions are

JS prototype chain and inheritance is the focus of JS, so we use the following three examples for detailed explanation. First define an object obj, the object's prototype is obj._proto_, we can use the getprototypeof in ES5 to query the prototype

I. Concept of objects What is the object? An object is a collection of unordered attributes whose properties can include basic values, objects, or functions. That is, a set of unordered sets of name-value pairs. The attributes of an object (not

Backbone.router () overview A backbone route is a JavaScript string, similar to the URL path name in traditional knowledge. This string-like pathname is the property name (or reference-named function) of a function that is invoked when a URL in the

The Backbone.router function is to manage routing. Backbone.history is part of a route that listens for and responds to URL changes, including updates to the browser's history. The Backbone.history () constructor is instantiated by the backbone

Template Method Mode description Definition: Defines the skeleton of the method operation, extends some concrete implementations into subclasses, and uses specific implementations that do not affect the skeleton's behavioral steps! Description: A

JavaScript scopes are the accessible scope of variables and functions. 1. Variable Scope In JavaScript, variable scopes are divided into global scope and local scope. Global scope You can define a variable with global scope Anywhere 1.

Let's start with how callbacks is used: the first example function A () {} Function B () {} var cb = $. Callbacks (); Cb.add (a); Cb.add (b); Cb.fire (); //You will execute the a method first and then execute the B method The above probably

One, the object ECMA-262 defines an object as an unordered collection of attributes that can contain basic values, objects, or functions. So the object in JS is a set of key-value pairs. In object-oriented languages, you create any number of

Prototype mode: Each create a function has a prototype attribute, it is a pointer to an object; How the prototype mode creates the function: function Movie () {};Movie.prototype.name=

3 problems related to the scope chain The scope chain is a very red concept in the JavaScript language, and many programmers who learn and use the JavaScript language know that the scope chain is key to understanding some of the most important

State machine What is called the state machine (finite states Machine), the written explanation can be found by the search engine. Popularly speaking is a set of code that defines, finds, switches, and dispatches events. The corresponding design

The prototype mode specifies the type that needs to be created through the instance object, which is essentially different from the factory method pattern, where the factory method pattern is defined by the inheritance of the class to create

Today we'll explain how to use them in combat. I'm using a very popular library require.js. One, why should use Require.js? At the earliest, all of the JavaScript code was written in a file, and it was enough to load the file. Later, more and

A common way to create custom types is to use the constructor pattern in combination with the prototype pattern. The constructor pattern is used to define the specific parts (properties and methods) of the instance object, and the prototype pattern

To find a circuit, from a currency to exchange a circle back to their own, see whether the exchange rate of the product is greater than 1 Extend the General shortest road bellman, calculate to Dist (n), is counted to the loop Maxdist (k) [v] =

Order I did not appear in the recommendation column for a long time, it seems that a good response, so the continuation of the article. Properties ? When accessing properties, we use the dot (.) operator. var Luke = { Jedi:true, Age:28 }; Bad var

JavaServer Faces (JSF) is a new standard Java framework for building WEB applications. It simplifies development by providing a component-centric approach to developing a Java Web user interface. JavaServer Faces also aroused the interest of the

Article Introduction: Let's take a look at some of the properties of jquery Mobile. In this article, let's take a look at some of the properties of jquery Mobile(Note: The code snippet in the following example is from version 1.1.0)First,

Optimization of Download size: One: Compression tool compression ESC-1.14 E:\esc-1.14>cscript esc.wsf-l 4-ow E:\js\src.js E:\js\new.js -L Leval level [0-4] 0 Merge multiple js, 1 go to comment 2 go to space 3 Remove line 4 simplify variable