JavaScript

Let's talk about the difference between break and continue. Excerpt from JavaScript advanced programming for (Var i=0;i5) {break ; } } Console.log (i); ---6 • When i=5 and 10 are executed to the break and exit the loop

If you don't understand the origin, please don't worry, drill down on the CSS rules and look at the Using css to Fix anything:20+ Common Bugs and fixes this article. If the above article doesn't help you, you can use one of the 12 JavaScript

function of JavaScript Property: 1, Arguments Objects 2, caller A reference to a function that calls a single preceding function, if it is called by the top-level code,Returns null (Firefox returns undefined).Note: It makes sense only when code

1, Feature description: InnerHTML Sets or gets the HTML outerhtml setting or getting an object and its contents in the beginning and end tags of an object InnerText settings or Text Outertext settings (including labels) or get (excluding labels)

1. When the Web page is loaded, the JS file reference in the page code (below) will generate an HTTP request to the server because the file that was loaded before the Body.onload event (which I call static loading) will produce an HTTP request to

The Magic weapon is concurrent.thread this guy, is actually a JS library, you can download source code from the website. How to use it? Very simple Concurrent.Thread.create (f, A1, A2, ...) F for the function you want to call, A1,A2 as the parameter

The drag scaling here is a bit more complex than the general marquee, can set eight azimuth (direction) fixed trigger point, can set a minimum range, maximum range and proportional scaling. As with the drag-and-drop effect, the prototype of the

What is "clone"? In the actual programming process, we often encounter this situation: there is an object A, in a moment a has already included some valid values, you may need one and a exactly the same new object B, and any subsequent changes to B

Like the following implementation method: In Firefox, Google Chrome, Safari, Opera: You can use Window.getselection (reference MDC) Under IE, you can use Document.selection.createRange (). Text (refer to MSDN) Note: The code that puts the two

Native JS uses foreach () and jquery to use each () to traverse the array, the difference of return false: 1. Use each () to traverse array A, as follows: var a=[20,21,22,23,24]; $.each (A, function (index,val) { console.log (' index= ' +index)

Keypress's KeyCode: Small keyboard Large keyboard “-” 45 45 “.” 46 46 0~9 48~57 48~57 "M" 109 N 110 A~z 9

Here is a section of the test code: Test results are: KeyDown KeyPress KeyUp Obviously, the sequence of events occurs: KeyDown--> keypress--> KeyUp When you hold down a key for a period of time and then release it, the result

combination mode: combine a group of objects into a tree structure, and treat grouped objects and leaf objects uniformly, ignoring the differences between them (because leaf objects can also contain leaf objects and become composite objects),

ES6 This string object has expanded a lot of methods, but many are related to the character encoding, the individual selected a few feel more commonly used methods; Includes search for character artifacts Remember how we previously judged whether

The first thing you have to say is that this point is not certain when the function is defined, only when the function is executing to determine who it is pointing to, and actually this is ultimately pointing to the object that called it (there are

But after my little efforts, finally let me touch the doorway, the problem is taken for granted. And then you write a formula that should get rid of the usage, the formula: 1. Starting from 1 to any value LineNum parseint (Math.random () * Upper

if (document.mylist.length!= "undefined") {} This usage is incorrect. The correct is if (typeof (Document.mylist.length)!= "undefined") {} Or if (!isnan (Document.mylist.length)) {} The typeof operand is undefined, and the return is "undefined". The

In web programming, it is important to identify the user's browser and operating system. Because they have different levels of support for HTML and JavaScript. General application in the System landing page or the homepage. The specific application

Copy Code code as follows: using Javascript to achieve smooth jump between anchor points (anchors) header_1--> header_4 header_2--> header_5 header_3--> header_6 header_4--> header_7 header_5-->

The click () object. Click () to cause the object to be clicked. Closed object. Closed Object window is closed True/false Cleartimeout (object) clears the SetTimeout object that has been set Clearinterval (object) clears the SetInterval object that