JavaScript

Copy codeThe Code is as follows:Function getElementsByClassName (elem_name, elem_tags) {// elem_name: name of the queried class, elem_tags: under which element to searchIf (elem_tags = null ){Elem_tags = '*';}Var all_elem = document.

• Simulate block-level scopeWe all know that there is no block-level scope concept in JavaScript. We can simulate block-level scope by using closures. See the following example:Copy codeThe Code is as follows:(Function (){For (var I = 0; I // Do

Click the link to insert the link content.Highlights:1. Regular Expression matching mark.2. Click Add in jQuery and double-click Delete.3. Add a line feed to textarea.Core code:Copy codeThe Code is as follows: Click to Text foot home Baidu QQ

This is shown in the underscore (1.3.3) Source Code. Its each methodCopy codeThe Code is as follows:Var each = _. each = _. forEach = function (obj, iterator, context ){If (obj = null) return;If (nativeForEach & obj. forEach === nativeForEach ){Obj.

1. When a space exists in the parameter, the space in the obtained value is replaced with the plus sign: +2. If the value of a key does not exist, the obtained value is true instead of null or null.You have found a solution on the Internet. For more

For example:Copy codeThe Code is as follows:$ (This). test (). hide (). height (); To implement similar writing behavior, a jquery object should be returned in each plug-in method unless the method needs to explicitly return a value. The returned

For the above example, we can call the jquery. fn. extend () method to create the jquery object method. The Code is as follows:Copy codeThe Code is as follows:JQuery. fn. extend ({Test: function (){Return this. each (function (){Alert (this.

I. Variables• Global VariablesThe two features of JavaScript make it unexpected to unconsciously create global variables. First, you can use variables without even declaring them. Second, JavaScript has an implicit global concept, this means that

Copy codeThe Code is as follows:// Division function, used to obtain accurate division results// Note: the division result of javascript has an error, which is obvious when two floating point numbers are separated. This function returns a more

The implementation is also very simple, but it should be noted that in the event displayed by clicking, You need to block event bubbling processing, otherwise the page Click Event will be triggered. However, this method also has a disadvantage: if

1. How to run the delayed script:Method 1: place all javascript references in the element. After the page content, as shown in figureCopy codeThe Code is as follows: Example 1 Method 2: Define the defer attribute defer = "defer" for the

1. prototype chain// Rarely used separatelyCopy codeThe Code is as follows:View Code// Defines the SuperClass class, which has an attribute property and a method getSuperValueFunction SuperClass (){This. property = true;}SuperClass. prototype.

The jquery framework should be referenced first.Then start the HTML code:Copy codeThe Code is as follows: professional Q & a platform ah, it's developed, but separated. Local Operation of the al-Asad industry Then look at CSS (you can

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Chosen plugin http://www.jb51.net/jiaoben/38027.htmlCopy codeThe Code is as follows: Apply JS filesCopy codeThe Code is as follows: United States United Kingdom Afghanistan Albania Class sets this to chzn-selectInitialization: $ (". chzn-select"

Console. log was originally a "patent" of Firefox, and strictly said it was a "trick" for debugging unique to Firefox after Firebugs was installed ".This trick is learned by IE8, but it is more difficult to use than Firebugs. The console. log can

But there is a problem.Although JS decoding JSON is very convenient, there seems to be no good way to code it...In the principle that you can be either lazy or lazyI found it.Json_decode can be directly used in PHP for decoding, which is quite

QuerySelector and querySelectorAll are new Query Interfaces provided by W3C.Copy codeThe Code is as follows:Module dom {[Supplemental, NoInterfaceObject]Interface NodeSelector {Element querySelector (in DOMString selectors );NodeList

Waterfall stream-absolute positioning layout, which is different from floating Layout1. Different la s:Absolute positioning: Put all absolute positioning LI in a UL;Floating layout: Multiple (generally three or four) UL distributions are placed in

Let's just say nothing about it. Go directly to the Code:Jquery Plugin:Copy codeThe Code is as follows:/*Crazy talent was created onQQ: 1055818239Email: hxl_apple@163.com*/(Function ($ ){$. Fn. quickAd = function (settings ){Settings = $. extend