JavaScript

XML-> 1. sax 2.DomJSON parsing after IOS5.0 provides NSJSON before 5.0 using SBJSON and JSONKitContents 1. Basic concepts of parsing 2. XML Data Structure 3. JSON data structure 4. Advantages and disadvantages of the two data structuresResolution:

  First, = and =  First, it indicates that a special value NaN, typeof (Nav) gets 'number', but NaN is not equal to any value (including itself). To determine whether a value NaN can only use isNaN NaN = NaN // get falseNaN = NaN // get falseisNaN

Although prototype-based creation can effectively complete encapsulation, the following problems still exist:1. Unable to set the attribute value through the constructor2. When there is a reference type variable in the property, there may be

Data Types in javascript: Original Type: Number, String, Boolean value. (Original value: null, undefined) Object Type: Key-value pair, array, function, Global Object (MATH, JSON) Concepts of packaging objects: The String "aaa". len is not

Events are the heart of javascript beating, and are the heart of all components of DOM. When we perform some interactions on the WEB, the event also occurs. Click some content, move the mouse over a specific element, and press some buttons to change

Copy codeThe Code is as follows:Http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd> this is test ajax-based rss reading example blogjava original zone blogjava newbie non-technical area of blogjava comprehensive area  Enter an RSS address:

1. void operation expression and ignore its return value, such as void (1 + 2), void (0) Copy codeThe Code is as follows:1. Use the onclick event for flexible processing; 2. void (expression) Baidu Google 2. typeof: Type of the returned variable

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Ps. This time I want to say"", But I don't know why the Chinese official website didn't provide a translation, but when I saw the case, it felt like a bug. I 'd like to call it a high-altitude bug for myself, if you have other good ideas, please let

Set the display TimestampRequest. setAttribute ("currentTimeStamp", Calendar. getInstance (). getTime ());%>Display: 2009-11 Display: 23:47:06 Display: $12.00 Display: $12.0 ￥12.0 $12.00 ￥12.00 (the currency symbol is related to the local settings

HTML code:Copy codeThe Code is as follows:Enter the price:JS Code:Copy codeThe Code is as follows:

Method 1:Copy codeThe Code is as follows:Var temp =/[A-Fa-f0-9] {2}: [A-Fa-f0-9] {2}: [A-Fa-f0-9] {2}: [A-Fa-f0-9] {2}: [A-Fa-f0-9] {2 }: [A-Fa-f0-9] {2 }/;If (! Temp. test (document. mac. value )){Return false;}Method 2:Copy codeThe Code is as

Copy codeThe Code is as follows: release start date OnFocus = "WdatePicker ({el: 'uslinetime', dateFmt: 'yyyy-MM-dd', maxDate: '# F {$ dp. $ D (\ 'uelinetime \')}'})"Value = "" required = "true"/> release end date OnFocus = "WdatePicker ({el: '

The following code passes in IE8 and an error occurs in IE9:Copy codeThe Code is as follows:Document. createElement (' ');Error message: exception: SCRIPT5022: DOM Exception: INVALID_CHARACTER_ERR (5) Train of Thought Analysis:Step 1: compatible

The img element in the page, to obtain its original size, take the width as an example may first think of the width, as shown in the following the getWH method used here is mentioned in the previous article. The obtained width is the same as the

Copy codeThe Code is as follows:Var json = {JArray: [],JPush: function (c ){This. jArray. push (c );}}Var examp = ["123 ","~ "," 456 "]; Use the forEach loop examp given by ES5 and add them to jArray in json;Copy codeThe Code is as follows:Examp.

We know that console. log () can output information to the debugger for developers to view. But what if we want to get the output result of console. log () in JS? In fact, it is not difficult to save the original console. log and replace it with

JS click element send ajax request open a new window often encounter such a requirement in the project, click an element, need to send ajax request, after the request is successful, the development needs to pass the link to the front-end (or open a

Occasionally, Javascript is used to refresh the page. When the page cannot be refreshed, We will summarize several methods of refreshing the page using Javascript, as shown below: Window. location. reload () refresh the current page. parent.

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