JavaScript

In several cases 1. If the RE is not global, that is, without Gvar str = "Cat3 hat4"; var re =/\w+\d/; var ex = re.exec (str); var mt = Str.match (re); Console.log (ex); Console.log (MT);The result is ["CAT3"] that

Have seen such an interesting program:var a=3; function scopetest () { console.log (a); var a=2; Console.log (a);} Scopetest ();The results are printed on the console:Undefined2For the first time the output of the undefined feels strange.After

The code information comes from http://ejohn.org/apps/learn/.Analyze the structure of the objectfunction Ninja () {} var New Ninja (); typeof Ninja = = "Object", "Still Objects" ); instanceof Ninja, "is an example of Ninja" = = Ninja, "Ninja

http://www.cnblogs.com/meil/archive/2006/09/20/509359.html What if you have an "OnLoad" event in your Web page that activates more than two JavaScript functions?Take a look at the following example:function MyFunction () {Alert ("This is a function

The code information comes from http://ejohn.org/apps/learn/.How does the length property of a function work?functionfunction= = 1, "Defines only one parameter"= = 2, "defines two parameters");It is clear that the length of the function is the

This time the main record is the type conversion in JavaScript and three encoding functions.One, type conversionType conversions in JavaScript, which belong to global objects.parseint (string); Converts a string to an integer parsefloat (string); To

KeyCode 8 = BackSpace BackSpaceKeyCode 9 = Tab tabKeyCode = ClearKeyCode = EnterKeyCode = shift_lKeyCode = control_lKeyCode = alt_lKeyCode = PauseKeyCode = Caps_lockKeyCode = Escape escapeKeyCode = Space SpaceKeyCode = PriorKeyCode = NextKeyCode =

Non-modal Refresh parent page: Window.opener.location.reload ();Modal Refresh parent page: Window.dialogArguments.location.reload ();Let's look at a simple example:The following three pages were named Frame.html, top.html, bottom.html as an example

We know the following two ways to define functions in javascript:function mm () {}This form declares a function, just as VAR declares a variable mechanism, and the script does a pre-compilation process before interpreting the execution.var mm =

CSS power: drawing with a DIV and css power div These images are drawn using a DIV, but the principle is not complicated. These images are all drawn by CSS and implemented through the combination of background-image, For example, the implementation

Detailed description of html reserved characters and detailed description of reserved characters This article is collected by www.169it.com 1. Notes The comments in HTML are similar to those in other languages to facilitate reading and debugging

JavaScript language basics 4 Let's talk about the variables in JavaScript. The benefit of using variables in JavaScript: variables are stored in computer memory, and variables are very suitable for saving temporary data. variables only have a

Thoughts on a native js question (move your mouse to block timing)The problem is like this: Demo: mouseenter and mouseover difference demo cross-browser block counting demo DownLoad: https://github.com/zhangmengxue/Practice/timeCounter.html just

Summary of minor issues encountered during js usage (add as needed) (1) splice two identical json strings Development Background: In the query, easyui controls such as combobox are used, and the data is obtained from the background. By default, you

Node. js features and application scenarios, node. js features Node. js should be one of the hottest technologies today. This article describes the features and application scenarios of Node. js. Node. js is a platform based on Chrome JavaScript

JQuery Learning 1 Learn about JQuery and how to create, call, and close the mode window. (Document ). ready (function () {/* Background Resizer-Adaptive Background browser size */$ ("# bodyBackground "). ezBgResize ();/* modal windows */$ ('a.

How javascript jquery judges an object as null There are many null pointers in java, which need to be prevented and judged frequently. Otherwise, the console suffers annoying exceptions, causing confidence to be compromised and there is no

Arcgis for Js featurelayer for spatial query and attribute Query Space query and attribute query are two common data retrieval and query methods. This section describes how to implement featurelayer in Arcgis for Js, first, let's look at the

In jquery, the $. ajax method is used to submit a form. Copy codeThe Code is as follows:Function postdata () {// submit data function$. Ajax ({// call jquery's ajax MethodType: "POST", // set the ajax method to submit dataUrl: "OK. php", // submit

Jquery processes json objects and jqueryjson objects Php script on the server: Copy codeThe Code is as follows:$ Data ['id'] = 1;$ Dat ['name'] = "mary ";$ Da ['red'] = array_merge ($ data, $ dat );$ Data1 ['id'] = 2;$ Dat1 ['name'] = "Swallow ";$