JavaScript

jquery objects are objects that are produced after wrapping a DOM object through jquery. jquery objects are unique to jquery and can be used in jquery, but cannot use the DOM method, for example: $ ("#img"). attr ("src", "test.jpg"); The $ ("#img")

The right example:var person=function (name,age) {this . Name= "; This. Age= "; This. Say=function (msg) { alert (msg); } This.init=function (name,age) {this . Name=name; This. age=age;

The first direct regular expression is replaced oncereplaceTrim1 (source) { return source. } Replace(/^\s|\s$/g,"");}The second regular expression is replaced two times, first replaced before the replacementreplaceTrim2 (source) { return

ProblemUsing native settimeout and setinterval can only be implemented, timed to execute event handlers, In web development, there is often a situation where timers are used to periodically update data in a page area, Often after the page is loaded,

[Article Department from the network, see Useful Records in the blog, while sharing to everyone]Original link: http://www.2cto.com/kf/201409/335383.htmlWay 1,splice varary = [1,2,3,4];ary.splice(0,ary.length);console.log(ary); /

In JavaScript, the callback function is specifically defined as: function A is passed as a parameter (function reference) to another function B, and this function B executes function A. Let's just say that function A is called a callback function.

I. Overview The so-called Singleton pattern, as the name implies, is only one instance of a class.So, when we create an instance, we have to determine if it already exists, and if it already exists, return to the existing instance,

1. Everything in JS (variables, function names, operators, etc.) is case-sensitive. --true is a Boolean value, and true is just an identifier.2. The JS statement ends with a semicolon, but is not required for the reason:A. No semicolon at the end

In this post I'll share extremely useful hacks for JavaScript. These hacks reduce the code and would help you to run optimized code. So let ' s start hacking!1) converting to Boolean using!!operatorSometimes we need to check if some variable exists

JavaScript creates objects in several ways:1. Create an object using the object constructor.// 1. Create an object using the object constructor, the following code creates a person object and prints the property value of name in two ways.

This chapter is mainly about the words of the reservationJavaScript takes some identifiers for its own keywords. Therefore, these keywords can no longer be used as identifiers in the program:Break Delete function return typeofCase do if switch

ObjectiveYou don ' t know JavaScript is the previous series of GitHub articlesAt the beginning of this title, I feel how the foreigner also engaged in the title of the party, with this conflict of relatively strong topic to attract attention, so

So, in essence, a closure is a bridge that connects the inside of the function to the outside of the function.1. Function nesting functions2. External variables or objects can be accessed inside the function3. Avoid garbage collectionOne, what is

Overflow attribute, overflow Preface: May 4, 2016 Youth Day, as a young student party, began his blog career and encouraged him to be a diligent and motivated young man. Fantasizing about a career with a monthly salary of W + after graduation ......

CSS style priority, css style Speaking of the style priority of css, I will review it today. The style priority of css can be divided into two parts: 1,View the weight priority from the position where the CSS code is placed: Inline Style>Internal

Use of the jQuery. form plug-in and cross-origin asynchronous file upload, jquery. form cross-origin upload First understand This cross-origin asynchronous upload function uses Jquery. form plug-in, which is very effective in asynchronous forms,

Seven precautions for learning JavaScript: [mandatory ]. Knowledge description: For beginners of JavaScript, pay attention to the following seven major details to make our code easier to understand and more efficient when the same function is

Jquery implements the code for implementing the full-selection function, and jquery implements the full-selection code. It is mainly used to simulate the full selection of tables on some web pages. your favorite sports are: select all/select

Nodejs learning item [Getting Started] And nodejsitem I. Installation First, download the installation from the http://nodejs.org. My version is 0.8.14. The installation is very simple. The next step is the next step. Then configure the installation

Introduction to several methods for creating objects using javascript and several types of javascript In js, you can create objects in several modes and use the attributes and methods contained in object operations. Generally, the first letter of