JavaScript

The operation string and operation array in JS are similar.Take the following array as an example:var arr = ['e'c'r ' ' o ' ]; var arrnum = [64];1, determine whether the arrayif (arr instanceof Array) { Console.log (true);} if // ECMAScript 5

When we need to get the number of milliseconds in the future, the first possible way to think about it is(new Date ("2014-12-08 12:00:00")). GetTime ()This will return a number in the method under Chrome.But in IE the return is a Nan, is because IE

A trap inherited by JavaScript prototypesJavaScript defaults to prototype inheritance. Although there is no concept of class, its functions (function) can act as constructors (constructor). Constructors with This,new can build Java-like classes.

JavaScript gets the size of the screen, browser window, browser, Web page height, widthWeb page Visible area width: document.body.clientWidthWeb page Visible Area height: document.body.clientHeightWeb page Visible Area width:

Part Three DOM programmingThe Document Object Model (DOM) is a language-independent application interface (API) that uses XML and HTML document operations. In a browser, it is also common to work with HTML documents primarily, and to retrieve XML

Original topic: Given an unordered sequence of integers, the longest sequential sequence of numbers is found. For example: Given [100, 4, 200, 1, 3, 2], The longest sequential sequence of numbers is [1, 2, 3, 4]. A solution

Open a hole and learn to summarize JavaScript's AMD specificationsFirst write your own simple implementation to put up, and then slowly starting from 0 to explain how AMD, has done its own implementation of an AMD/*amd*/var DOC = Window.document;var

"NaN action is used to indicate that a value is not a number"Nan behaves strangely in JavaScript because that Nan and any value are not equal (including itself).Nan = = = Nan; FalseBecause the following code can cause some people to freak

First set up the environment scenario:General three DirectoriesSystem file storage directory for Lib JasmineSpec writes a catalog of test casesSRC directory where the source code is stored (the object being tested)Specrunner.html Test the entry file.

JSONObject jsonObject = new JSONObject () execution error When the code below was just executed, the program encountered no exception or error, but the next step was stopped. JSONObject jsonObject = new JSONObject (); Gson gson = new Gson ();

Internet Explorer does not support getElementsByClassName. getelementsbyclass The getElementsByClassName method has been added to DOM3. However, other versions except IE9 and 10 do not support this method. This is a pain point!Currently, this

JQuery CSS () method to change the existing CSS style, jquerycss JQuery getting started example: Use the CSS () method to change the existing CSS style sheet. The css () method is diverse in usage. There is one type that can accept two input

Javascript locks the webpage and password (similar to the screen protection effect of the system), and javascript locks Function Description: Open a Web page of a website. After five minutes, the page is locked and the content container is hidden. A

When the webpage is running, the prompt object does not support the abigimage attribute or method, and does not support the abigimage A js plug-in is used in a webpage. The js file reference is correct and the code is similar to the demo, but the

Algorithms and examples for parsing four arithmetic expressions in javascript, and four arithmetic operations in javascript When writing code, we sometimes encounter the need to parse four arithmetic expressions by ourselves. This article briefly

Practical development of CSS3: Hands-on teaching you how to develop animation effects with a mouse over an image. Hello everyone, I am a stranger, and you can also call me a stranger. In this article, I will show you how to develop animation effects

Js determines that when the page cannot be rolled back, the page will be closed; otherwise, the page will be history. go (-1), jshistory. go When creating a Web project, you may encounter a requirement. When the page does not have a pre-history

Example of dynamically changing the index value of select option in js A problem occurred when deleting multiple select values today. After half a day, it was originally caused by the index (that is, when the index is deleted, it should be deleted

I. UsageJquery's load function is a call to request another file and load it into the current DOM. The complete load method format is: load (url, [data], [callback]). (Note that no parameter is a GET request, and a parameter is the POST method ). *

Example: Put the following code directly: Arrow. js /*** Implement the function of drawing arrows between two points * @ author mapleque@163.com * @ version 1.0 * @ date 2013.05.23 */; (function (window, document) {if (window. mapleque = undefined)