JavaScript

The return here contains some details: For example: The difference between onclick= ' return Add_onclick () ' and onclick= ' Add_onclick () ' When JavaScript calls a function in an event, returning the value with return is actually setting the

Copy Code code as follows: Definition of strings in javascript

IntroducedThis plays a very important role in all kinds of opposite object programming, and is primarily used to point to the object being invoked. However, in JavaScript, this is a significant difference in performance, especially in different

Math.ceil (x)--Returns the smallest integer greater than or equal to the numeric parameter (the integer function), rounding the number Ceil is the abbreviation of ceiling, the Chinese "upper limit" means Reference URL:

JavaScript is Object oriented. But quite a few people are not fully aware of this. In JavaScript, objects are divided into two types. One can be called "ordinary objects", which is what we generally understand: numbers, dates, user-defined objects (

The following is my online three kinds of efficient methods of summary and efficiency testing, if you have better opinions or suggestions can also be proposed, we encourage learning. The array goes to the weight Method 1:

In the Ajax big line of today, analog pop-up window, or Thinkbox,greybox and many other special effects are using the Mask function, its application for us is also very simple: create an absolute positioning, Top/left are 0, width and height equals

Nonsense not to say, directly to everyone paste JS code to achieve handwritten picture Carousel code, the code is very simple, the specific code is as follows: js picture Carousel Switch Load ... Loading ... >　　　　 The

Reference methods within the same page: 1. Use ID: Link1.href 2. Use name: Document.all.link1.href 3, the use of Sourseindex: document.all (4). href/note, the front also has HTML, head, title and body, so it is 4 4, use the link

Extractnodes function solves the problem of node calculation in each browser. Firefox put the line break into a node, very unreasonable AH. First use the AppendChild to copy the previous four nodes to the bottom, so that the head and tail is the

JavaScript drag javascript Google IG Drag Demo, very good drag, ready for F2blog new theme background module settings, between the tow Move Drag-and-drop effect of the page effect demo address:

JQuery traversal function The JQuery traversal function includes methods for filtering, locating, and concatenating elements. function Description . Add () Adds an element to the collection of matching elements.

Adds a prototype method to the array local object, which is used to delete the duplicate entries in the array entry (there may be multiple), and the return value is a new array that contains the duplicate entries that were deleted. Formal

The last written "Uniq method for JavaScript arrays" found that the problem with the code was still there. For example, if there are undefined elements in the array can not be filtered. Yesterday I saw the Lazy brother renew the function, and now

Next go to the topic-the way to refresh the page regularly: 1. See timing, it is easy to think of JS timer: The first method //Because we already have a timer, so just add a word to refresh the page in the timer test to function test ()

There are three kinds of ways to declare variables in javascript: VAR, let, Const. The following gives you a description of the three types of JS definition variables const, VAR, let the difference. 1.const-defined variables cannot be modified and

About functions In JavaScript, a function is actually an object that has a characteristic of a reference type, so you can pass the function directly to the variable, which will represent a pointer to the function "object", for example:

The first time I heard that there was a "fail as soon as possible" rule in the coding principle, it was strange why the code failed? We should be successful. But in fact, the code should terminate as soon as possible when it encounters an error. In

Objective When you do JavaScript development, you often encounter the problem of duplication of array elements, and JavaScript array does not provide a way to solve the problem directly, it needs to be implemented on its own. This article

seconds timer RunUse the image below to copyJavaScript-Written Timer/countdown can also change the parameters (the image used has been uploaded)