JavaScript

Use curly braces on multiple lines of statement blocksBADIF (test) return False;//goodif (test) return False;//goodif (test) {return false;} Bad function () {return false;};/ /goodfunction () {return false;}For multi-line statement blocks that use

Points:1 , typeof operatorvar box=false;alert (typeof Box);2 , Undefined typevar box;//undefined type alert (box)3 , Null typeAlert (undefined==null)//undefined are derived from null, so they are two equal and return True4 , Boolean typevar box

Then in the second code execution process, there are 1 global variabe object,1 createfunction activation object,10 Anonymous function1 activation object, 10 anonymous Function2 Activation object, and these 10 anonymous Function2 activation object

JavaScript analog Map

Always declare a variable with VAR, or change it to a global variable. We have to find a way to avoid global space pollution.BADAAA = new AAA (),//goodvar AAA = new AAA ();//god bless!declaring each variable with VAR makes it easy to add a new

When triggering an event on the DOM, an event object is generated, which records Some information about the event. Regardless of whether the event binding is DOM0-level or DOM2-level, the event object is passed in, and when a handler is specified

There are two main methods of traversal, i++ method and in keyword methodvarlist = [1, 2, 3, 4, 5, 6,7,8];//var L = list.length; for(varIinchlist) {Console.log (list[i]);}//[finished in 0.3s]varlist = [1, 2, 3, 4, 5, 6,7,8];//var L = list.length;

This document complies with CC by-sa3.0Objective:Recently still looking at JavaScript, the first two days just read the closure of the part, and recently saw a few classic problems, aftertaste up the meaning of the unfinished, simply write down, for

HTML section: 1 2 3 4 5 6 CSS section: HTML, body {padding:0; margin:0; overflow:hidden;} #gp {width:100%; text-align:center; font-size:100px; overflow:hidden;} #gunping {width:100%; position:absolute; top:0; left:0;}. page {width:100%;}. Page1 {

Example 006 Popup window for cookie controlExample Description to make the same ad message pop up every time you hit the page, it pops up only the first time you open the page. Technical Essentialscookies are some of the customized pieces of

1 basic types are simple data segments that are stored in the stack's memory, and reference types are those that are stored in the heap memory, and the variables are actually just a pointer.5 basic data types in 2javascript

We all know that in JavaScript everything is the object, then the question comes, what is the object??A: An object is an instance of a particular reference type.So how do new objects build??A: The new object is followed with a constructor Function

This is a must for every person who wants to learn JavaScript in depth, I have read a lot of books for this, although I have a certain understanding of this and often use this, but if someone asked me this is what ah? I still can't give someone a

Css sprite generation tool 4.1 updated, css sprite generation tool 4.1 V4.0 address: http://www.cnblogs.com/wang4517/p/4493917.html This update is mainly used to fix existing bugs. You can directly view the update information on the client and

JS achieves the effect of simulating wind snow falling This article describes how JS achieves the effect of simulating wind snow falling. Share it with you for your reference. The specific implementation method is as follows: ? 1 2 3 4 5

Use JavaScript to implement the special effect of Flash glare and Fluctuation The dazzling and fluctuating effects written in JavaScript show that some Flash effects are good, and JavaScript is used to simulate them. There are still many

JavaScript to generate bubbles by moving the mouse over This example describes how to generate a bubble by swiping the mouse over JavaScript. Share it with you for your reference. The specific implementation method is as follows: ? 1 2 3

Recruitment websites use jQuery to automatically refresh resumes and jquery to refresh resumes. Change the value of the res_id_encode parameter in the Code, for example, 5830549229E3096684665 to the ID related to your own account. How to view your

Exception in json parsing org. json. JSONException: A JSONObject text must begin with & #39 ;{& #39; at character 1? {Solution The reason for this exception is that the json string format is not normal and does not end with "{" or "}". Check the

Several common js interview questions1. About the number type conversion in "+" and "-" Var a = ''+ 3; // try to convert 3 to the string var B = 4; console. log (typeof a); console. log (a + B); console. log (a-B); // try to convert the string to