JavaScript

Scope: (The premise of understanding closures is to understand the scope of JavaScript first)JavaScript uses function scopes rather than block-level scopes, and variables are defined within any function body that declares their function body to be

< ;/head> The above code execution is also incorrect because JavaScript is executed before loading, so if there is no breakpoint at the end of the console you can seedocument.readystate== "Complete" If you add onload, you'll execute JavaScript

ArrayJavaScript arrays can hold different types of values.Such as:var array = [' String ', 1,true,new Object ()];LengthThe length of an array can have no predefined lengths, so there is no subscript out-of-bounds,var array = [n]; Document.writeln ("

If statementif (test condition) statement1;else statement2;Comments/* Comments ... */Script level: Variables declared directly in are equivalent to global variables and can be accessed directly within each function. The variables of life

It is perfectly legal for JavaScript to ignore the VAR keyword when declaring a variable. JavaScript, as a weakly typed (loosely-typed) language, does not declare the variable type to be understandable, but the fact is not so straightforward,

Reprint: http://msdn.microsoft.com/zh-cn/library/h2ak8h2y (v=vs.94). aspxInvokes the method of an object, replacing the current object with another object.Call ([thisobj[, arg1[, arg2[, [, ArgN]]])ParametersThisobjOptional. The object that will be

regularexpression=/pattern/[Switch]This switch has three values G: Global match I: Ignore case GI: Global match + ignore case JScript Language Reference--------------------------------------------------------------------------------Back-to-reference

All along, the concept of a callback function is ambiguous:The following is an introduction to the callback function in the JavaScript language's pristine book:1. Functions make it easier to handle discontinuous events. For example, suppose you have

Variable declaration predecessor:The so-called variable declaration predecessor is in a scope block, all the variables are placed in the beginning of the block declaration, the following example you can understand1 var a = 1; 2 function Main () {3

In reading a lot of HTML code we are often able to see the code contains javascript: and Javascript:void (0), the following will explain the meaning of each. Javascript: javascript: is a URI pseudo-protocol of the browser, when the

!function () { var /* */_a =function(x) {; X.foreach (function(v) {returnv*v})}, _b=function(x) {var_each=function(v) {returnv*v}; X.foreach (_each)}, _c= (function () { var_each=function(v) {returnv*v}; return function(x) {; X.

Search from the Internet a lot of information, toss a half-day, finally fix, write down for everyone to referenceThis was found on the Internet.RadioButtonList put it in the form and run.But in the Ajax control Tabcontainer, the method fails.So look

Use the pseudo element: after to clear the floating, the pseudo element after floating Float: left/right is often used when the page is displayed with multiple columns, but the floating layout will cause the height of the parent element to be 0

JS case 6-Waterfall stream layout (1)In actual projects, a waterfall flow layout is occasionally used. Waterfall flow layout is characterized by ensuring that content blocks do not have large gaps in the horizontal direction during multi-column

Practice of exports and module. exports in nodejsAs long as you write your own file module in nodejs, you will inevitably encounter a module. for the use of exports and exports, most of other people's code will use "module. exports = "this is a

How to Use the datepicker plug-in of Jquery UI Http://www.ido321.com/375.html Jquery UI is a rich array of Jquery plug-ins, and each part of the UI can be separated and used independently, which is not an advantage of many other Jquery plug-ins.

Jquery uses $ (element). is () to determine the obtained tagName, jquery. is If you want to get the tagName before making a judgment, you can use jquery $ (element). is. If you want to get the tagName before making a judgment, it is more

Problems and countermeasures: CSS margin collapse (collapse) and margincollapse   1: 2: 3: 4: 5: 6: 27: 28:  29: 30:  31: 32: Span2 33: 34:  35: 36:  37: If you think

Nodejs instant chat I always wanted to create an instant chat application. I saw socket. io a few days ago. I felt pretty good. I made some modifications myself and it felt quite good. The example given on the official website is very simple. The

Jquery implements the example code of the drag window, which is similar to IGoogle. Google is the most powerful ajax effect. google suggest, google map, and igoogle can be used to drag windows... today, I want to make a website with similar effects.