JavaScript

There is a arguments in the function default: he represents the parameter that the function passes in when it executes Arguments: arguments, actual parameters Arguments: Variable parameters refer to the number of arguments that are not

Async Property The Action Async property indicates whether asynchronous downloads are allowed.Basic grammar boolvalue = Xmldocument.async; Xmldocument.async = Boolvalue;Indicates that the Boolean value is Erasable (read/write), True if the

1. As a function call, refers to the global objectIf we define the following functions:function f () {Console.log (this);}It is then invoked as a normal object, that is, f (), at which point this refers to the Global object window.2. A method call

One: What is the monomer mode:What: The code is organized into a logical unit in which the code is accessed through a single variable. As long as there is an instance of the monomer object, you can be sure that all of your code uses the same global

Function argument Small example one: FnA (1,2);FnA (2,3);function FnA (a,b){alert (A+B);} Function argument Small instance one: Css:body,ul{margin:0;padding:0;}li{List-style:none;}. box{width:200px; margin:20px Auto;. box ul{height:30px;Box

1, onbeforeunload Event:Description: Currently the three major browsers Firefox and IE support the onbeforeunload event, Opera has not yet supported.Usage:Object.onbeforeunload = HandlerDescribe:When the event is triggered, a confirmation and

Labjs is a small JavaScript tool used to load JavaScript files as needed, by using the tool to enhance the performance of the page, to avoid loading JavaScript files that are not needed, and to implement dynamic parallel loading of script files. and

parseURL function This function creates a new anchor element and uses locationProperties (inherent) to get the desired URL data. Some StringOperations are used (to normalize results across).function parseURL (URL) {var a = document.createelement ('

JavaScript is a very flexible language, and the This keyword is flexible, but because of its flexibility, it is doomed to be difficult to use. I used this when I would feel uneasy, always worried that it does not know how to point to another place.

The code is as follows Copy Code ShowTime ();function ShowTime (){var today = new Date ();Alert ("The time is:" + today.tostring ());SetTimeout ("ShowTime ()", 5000);} Once this function is called, the time is displayed

Definitions and usageThe eval () function computes a string and executes the JavaScript code in it. Grammareval (string) parameter descriptionString required. The string to evaluate, which contains the JAVASCRIPT expression to evaluate or the

What is an objectsimply put, the object in the programming language is the simplification of things in the real world. For example, we are one object, but it is difficult for a programming language to fully describe a complex object. So we have to

Principle: Get the page source (document.referrer) when the page is loaded, analyze the search engine keyword, then get all the elements on the page, recursive query contains search keywords, if so, create a SPAN element, and apply the keyword

To print the contents of an array:Code:-------------------------------------------------------------------------------- The code is as follows Copy Code function Printelt (element, index, array) {Document.writeln ("[" +

Verify password: Can only enter 6-20 letters, numbers, underscoresThe code is as follows: function ispasswd (s) { var patrn=/^ (W) {6,20}$/; if (!patrn.exec (s)) return false return True } Check ordinary telephone, fax number: You can "+"

Web effects useragent Get user Browser type var useragent = navigator.userAgent.toLowerCase (); useragent property syntaxNavigator.useragent;UserAgent Property Description Attribute descriptionappCodeName Gets the code name of the browser.

If there are spaces or other delimiters in the string, you can split the Split method, return an array, and The number of years in the array is passed as a parameter to the new date () to generate the date type;If there is no special separator, you

Web page special effects array [] {} array operation detailed JS does not have an array of character indices except numbersOf course! Can do that when the results are not what you thinkSuch as:var p = new Array (); P[0] = ' first value '; P[1] = '

Try...catch can test errors in your code. The try section contains the code that needs to be run, and the catch part contains the code that runs when the error occurs.There are two ways to catch errors in a Web page:Use the Try...catch statement.

Because all blogs have been revised to PJAX (pushState + ajax ). Therefore, similar to works and other lists are read using interfaces. The time returned by the backend is a MySQL timestamp and cannot be used directly. Therefore, you need to format