JavaScript

Events are one of the core elements of JavaScript, and an important concept that inevitably comes to the application of events is event bubbling, which introduces another important conceptual event flow before introducing event bubbles: A. What is

1, the problem background Judge whether the div inside is empty, if it is empty, give countless hints; otherwise, show the normal page 2, the implementation of the effect of the figure shown below: 3. Design Source How to determine

Sometimes we don't want a class that is inherently huge and contains many responsibilities at once. Then we can use the decorated pattern.Decorative patterns can dynamically add additional responsibilities to an object without affecting other

Picture horizontal seamless scrolling effect in a large number of Web sites have applications, especially when some corporate web site in the display of products, because it is dynamic effect, so can give the site a lot of color, compared to static

A menu button Special effects case, simple to achieve the dynamic effect. Nonsense not to say, directly to everyone paste code, code to write good, but also please give a lot of advice to heroes. . bar{width:px; height:px border:px Solid

JavaScript performance problems can not be underestimated, which requires us developers to write JavaScript programs to pay more attention to the details, this article is very detailed introduction of JavaScript performance optimization knowledge

Here are my learning notes, which should be useful for JavaScript beginners. scope of a variableTo understand closures, you must first understand JavaScript's special variable scope.The scope of a variable is nothing more than two kinds: global and

When an event on the DOM is triggered, an event object is generated. Event objects in the DOM A browser that is compatible with the DOM passes an event object to the event handler. The event object contains the properties and methods associated

This article illustrates the JavaScript implementation checkbox checkbox detailed code, shared for everyone to refer to, the specific content as follows Effect Chart: Specific code: Untitled document Select the category you are

This article describes the JS implementation of the national provinces and cities two-level linkage drop-down selection menu, to share for everyone to reference. Specifically as follows: Effect Chart: Specific code: Untitled document

Learning JavaScript Asynchronous checksums is often learned from the most traditional xmlhttprequest, and this article discusses the understanding of traditional checksums: Code 1index.jsp files: How to use traditional method Step

If you haven't contacted a dynamic language, it will be a magical and weird feeling to understand JavaScript in a compiled language, because the things that are often impossible in consciousness happen, and even feel unreasonable. If you're learning

Native app in the data list will use the effect of Drop-down refresh, in the WebApp can be used Iscroll, swiper and other plug-ins or framework implementation, then how to code to achieve similar results, the following describes the use of native JS+

Like other high-level languages, JavaScript also has the new operator, and we know that the new operator is used to instantiate a class, allocating an instance object in memory. But in JavaScript, all things are objects, why do they have to be

In the real sense, JavaScript is not an object-oriented language, does not provide a traditional way of inheritance, but it provides a way of prototype inheritance, using the prototype properties provided by itself to achieve inheritance. JavaScript

From today onwards, I will lead new friends, from understanding JavaScript start, step by step into the realm of the great God, the other No nonsense, now, we start from the beginning of 1.1 points. We still introduce the origin of JavaScript,

The example of this article describes the click of the text box to clear the default text to leave the back of the JS instance code, share for everyone to reference, the specific content as follows Related knowledge: 1, the OnClick event

An iterator pattern is a method that provides a way to access individual elements of an aggregate object without exposing the internal representation of that object. The Array.prototype.forEach in JavaScript One, the iterator in jquery

Tell me about the principle, or the first picture: Function Description: Load different data according to the property values of different menus Drop-down scroll bar to a certain position preload picture, scroll bar to the bottom when

This article introduces the JavaScript waterfall Flow layout of the relevant content, shared for everyone to refer to, the specific content as follows JS principle It says that the column layout is simply a complete abuse of the layout of the