JavaScript

One of the frequently asked questions in front-end interviews is "What are the basic types of JavaScript ?". Some answer "numbers, strings, and Boolean", and some may add "Null, Undefined ". Some people may think that "object" is also the basic type.

Event. currentTarget identifies the current target for the event, as the event traverses the DOM. it always refers to the element the event handler has been attached to as opposed to event.tar get which identifies the element on which the event

1. Reference of page elements The $ () referenced element of jquery includes methods such as id, class, element name, element hierarchy, dom or xpath conditions, and the returned object is a jquery object (set object ), you cannot directly call

Some websites will always block your right-click or copy with shortcut keys. In fact, it is just a piece of js Code. The solution is to save the webpage directly and then delete the following JavaScript code, then you can right-click the menu.Of

Jquery is so popular that it must be extraordinary. Learning through open source code is a good learning method!The following is my simulated method. I try to simplify it as much as possible.Define Object C (similar to jquery's $ method) -- this is

QuestionIn the first article, a Boyou raised the following questions. I don't quite understand either. If you have any understanding, can you tell me one or two. Copy codeThe Code is as follows: Var str = "test "; For (var a in str ){ Console. log (

Javascript obstruction The performance of Javascript in browsers may be the most important availability issue.Javascript's obstructive browser uses a single process to process the UI process and Js executionWhether embedded or external, download and

Recently, the project was designed to implement a drag-and-drop layer, so I made one manually using Jquery and shared it with everyone. I hope I can get guidance from experts, if the Hero thinks that my ideas and code are incorrect or need to be

The desktop effect of the iphone is tested only by Google because it uses the css3 style. iphone desktop effect [Ctrl + A select all Note: If you need to introduce external Js, You need to refresh it to execute]

I think most people know how to use web pages to pop up various forms of windows. But how to make a variety of pop-up windows? Let's take a look at it today:1. Pop up a full screen window Copy codeThe Code is as follows:; www.jb51.net 2. Pop up a

Currently, there are many web page loading progress bars on the Internet, but most of them are fixed in time.When a large amount of data is queried below, the webpage loading is slow. When the webpage is loaded, the progress bar is displayed. When

Currently, this solution can be used to determine that the browser does not support this method. If it does not support this method, add the getElementsByClassName Method to the document Object. This method has the following advantages, no matter

Javascript obtains the size and position of a window (container). Many things are easy to confuse. Here we will give a brief description:Attribute method description:The horizontal coordinate of clientX relative to the document;The vertical

In fact, the principle of "element drag and drop to change the size" is different from that of "element drag". It is mainly used for top, left, width, and height, relatively easy to implement. The following is a source code prototype. After you

I want to refresh the images on a webpage at a certain interval without changing the image name. I changed the image content on the server side. Can the front-end achieve dynamic results? Will the browser be cached?For example, how can I

JQuery programming implements a group of 8 images. When you enter the page, the first four images are displayed, and then automatically scroll left until the last four images are displayed on the screen.The following is the jQuery code:Copy codeThe

CSS allows you to move the mouse over the image and change the image. This is a result fully implemented by CSS. Of course, JavaScript can also be used. When you move the mouse over the image, the image is automatically replaced with other images,

Operate the parent window object in ModalDialog1. window. parent cannot be used. Window. parent is used to operate in the frame. It cannot be used to operate the parent Window object in the dialog box.2. correct practices You can call modaldialog by

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Copy codeThe Code is as follows:D-Position allows you to move an absolute Position object by dragging it.AbsolutePosition: Set the position attribute of the element to "absolute" (absolute ).Set BackColor or obtain the background color of the