JavaScript

Oneprofile is a web-version gadget that showcases the results of JavaScript performance analysis in new ways, helping developers gain insight into function call relationships and optimize application performance. BackgroundChrome Dev Tools

Variables that use Var will be declared at the beginning of JS, so the VAR variable declaration order does not affect1 inch // false 2 inch // true 3 aa=5; 4 var bb=2;Variables use VAR (explicit declaration) as local variables, variables do not use

The advanced chapter of document provides functions for node operations, including: acquiring nodes, changing nodes, deleting nodes, replacing nodes, creating nodes, adding nodes, cloning nodes, and so on. We can use these functions to dynamically

Combined inheritance, also known as pseudo-classical inheritance.As the name implies, set the prototype chain and the length of the constructor, the two together, using the prototype chain to implement the prototype properties and methods of

In the years of development mailbox Webmail process, NetEase mailbox front-end team accumulated a lot of experience, we developed a lot of basic JS Library, to achieve a large number of front-end effect components, developed a mature OPOA framework

Execution Environment　The formation of the scope chain is related to the execution environment (execution environment), where the execution environment is generated in JavaScript in the following 3 scenarios:1 Entering the Global environment2

http://www.cnblogs.com/onepixel/p/5062456.html @ one PixelClosures, is an important concept in JavaScript, for beginners, closures are a particularly abstract concept, especially the ECMA specification to the definition, if there is no actual combat

eval functionThe Eval function receives a string consisting of a JavaScript statement and returns the return value of the last statement in the string, and if the last statement does not return a value, the Eval function returns undefined. If the

Transferred from: http://lllt.iteye.com/blog/1246424The 66th page of JavaScript Advanced Programming (Second Edition) mentions: "Because the variable object of the WITH statement is read-only, the resulting URL becomes part of the function execution

1. Don't forget var when declaring variables2. Equal comparison please use = = = instead of = =3.undefined, NULL, 0, False, NaN, ' ' (empty string) are false values at the end of the line sealed number3. Be careful with TypeOf, Instanceof and

constructor function:The so-called "constructor" is actually a normal function, but the this variable is used internally. Using the new operator on a constructor enables you to generate an instance, and the this variable is bound to the instance

Don't say a word; first a piece of code;var scope= ' global '; function test () {alert (scope);      Output undefine, not global var scope= ' local ';        alert (scope); Output local}test ();You may think that the first alert will output

JQuery implements the shopping cart Method Based on json and cookie, jqueryjson This document describes how jQuery implements a shopping cart based on json and cookie. We will share this with you for your reference. The details are as follows: Json

Examples of Countdown effect implemented by jQuery, jquery Summary This example summarizes the countdown effect implemented by jQuery. We will share this with you for your reference. The details are as follows: Jquery countdown effect 1800

Js imitation QQ to contact left sliding, slide the delete button operation, js imitation In this article, we will share with you the following operations on contacts in QQ: Slide left and slide the delete button. If the slide is greater than half,

Js-only implements waterfall stream layout and ajax dynamic addition of data, jsajax This article uses pure js Code to write a waterfall web page effect, initially implementing a basic waterfall stream layout, and rolling to the bottom to simulate

JS Form Verification Code (commonly used) and js Form Verification Code There have been no projects recently, and there is a little time to do it. I will sort out the commonly used js Form Verification Code and share it with the help house platform

Front-end newcomers learning notes ------- html/css/js BASICS (3), learning notes ------- html This was a bit of a problem at home, and it was a bit of a task at work, so I didn't watch the video for a few days and didn't update it. Update it today.

JS modular Development (requireJS) Advantages of modular development:Expose interface through exports. This means that no namespace is required, and no global variables are required. This is a thorough solution to naming conflicts.Use require to

Deep understanding of CSS radial gradient radial-gradient and cssradial-gradient* Directory [1] Definition [2] center of the elliptical circle [3] elliptical type [4] elliptical size [5] Color Mark [6] repeated gradient [7] other words This article