JavaScript

I. clearAttributes ()This method is used to clear all user-defined attributes. As follows:Copy codeThe Code is as follows: Division The following pop-up is displayed after running: We can see that the outerHTML output by alert for the second time

Example:Jquery code:Copy codeThe Code is as follows: Html code:Copy codeThe Code is as follows: test which apple do you like? Apple orange pineapple enter the password select 1 select No. 2 select No. 3 select No. 1 select No. 2

I. Closure in javascript1. Let's first understand what is the function scope. 2. called object Examples:Copy codeThe Code is as follows:Function display (something){Function executeDisplay1 (){Document. write ("I am printing for the Boss:" +

The concept of scope in JS:It indicates the region where variables or functions work. It refers to the context in which they are executed, that is, the context execution environment. There are only two types of Javascript scopes: global and local

When defining a function, the function itself has a prototype attribute by default. If we use the new operator to generate an object, there is no prototype attribute. Let's look at an example to illustrate this.Copy codeThe Code is as

If the DOM element does not have a style, the operation will not be performed. 2. We can also use JS to dynamically write DOM elements to html.Today, we will talk about these two applications.(1) operate on existing DOM elements in html.As I

The Code is as follows:Copy codeThe Code is as follows:Function ObjRegExp (){Var newStr = "Drive someone up a wall ";NewStr = newStr. replace (new RegExp (/\ s/ig ),"");Var objJson = {};For (var I = 0; I Var objChar = newStr. charAt (I );If (objJson

Copy codeThe Code is as follows: test count down button If you are interested, you can implement it by yourself.

First download node. js, decompress it to the E disk, change it to node, then Enter cmd in the menu, and use the cd command to switch to the decompressed directory of nodejs: Example 1: hello world. Create a hello. js file in the node directory,

The APIS provided by JQuery UI greatly simplify the development of the drag and drop function. You only need to call the draggable and droppable functions on the source and target respectively.Drag Principle First, we need to clarify several

For various reasons, such as complicated code logic, long-time forgetting to handle details, or simply taking over and modifying bugs left by others, debugging becomes a headache.I would like to share some JS debugging skills here, which can often

Copy codeThe Code is as follows:// Determine whether the start time is earlier than the end timeIf ($ ("# txtBeginTime"). length> 0 & $ ("# txtEndTime"). length> 0 ){If (Date. parse (TimeFormatToSQL ($ ("# txtBeginTime "). val ()). replace ("-", "/")

Copy codeThe Code is as follows:It should be noted that this is determined based on the time of the client,Start = "2012-02-24 ";End = "2012-02-27 ";Actually shown in the last two days of the 1949th and 1949thDEMO code: display advertisement _

2.1 syntaxCase-sensitive, weak variable type, line-and-tail semicolons are optional, comments are diagonal lines, and parentheses indicate code blocks.2.2 VariablesVariables are declared using var. Naming rules for variables: the first character

Function classDefinitionThe Function class can represent any Function defined by the developer. The syntax for directly creating a Function using the Function class is as follows:Var function_name = new Function (agrument1, agrument2,..., argumentN,

2.9 Operator2.9.1 unary OperatorsThe unary operator has only one parameter, that is, the object or value to be operated.1. delete: delete references to previously defined object attributes or methods. However, this operator cannot delete undefined

Final effect:Copy codeThe Code is as follows: pop-up layer plug-in: jquery. artwl. thickbox. js pop-up layer plug-in jquery. artwl. thickbox. js (http://www.jb51.net) Artwl Plugin PrincipleThe principle of all pop-up layers is similar, that is,

I recently read several articles about javascript closures, including the recently popular Uncle Tom series and the articles in javascript advanced programming ,...... I can't understand it. Some of the Code is not read in university textbooks, and

The most common method is:Copy codeThe Code is as follows: url? Arg1 = value1 & arg2 = value2 & arg3 = value3...This method is the most common, common, and easy to understand. However, in a project, if the following parameters are variable and the

As follows: The source code is as follows:Copy codeThe Code is as follows: You can also enter 40 Chinese characters