JavaScript

First Second Third Fourth Fifth The selection box pops up in javascript to jump to other pages A prompt box pops up in javascript to jump to other pages.

Now e-commerce is booming. The countdown to JavaScript is widely used for flash sales and time-limited time. Next, let's look at the countdown effect first.Effect demonstration Code that can be written at Will is still to be improved. The source

If you have developed front-end applications, You Should overhead the browser compatibility issue. Here is a way to determine the type of CSS to be used based on your browser. Similarly, you can also display the day, night, or early morning based on

Javascript is a prototype-based programming language, which is very different from the class-based programming language, I will list the following important points: The function is a first class object, that is, the function has the same

Phototype in JS is a more difficult part of JS. Javascript methods can be divided into three types: class methods, object methods, and prototype methods. Example: Function People (name) {this. name = name; // object method this. introduce = function

During Web development, you may encounter this situation: we need to reference functions in another js file through one js file, however, is there a way for another function to load data through the Put the preceding 3 files in the same directory.

In some cases, you do not need to right-click the page, for example, you do not want to view the source code of the page, or copy the content of the page. Of course, users can use various methods to achieve their goals, but we can try to increase

This article aims to allow more programmers to understand some concepts of javascript. We already know enough about it. It's time to move closer to the deeper understanding. Why do you say that, if you receive an interview invitation a few days ago,

Sometimes we need to display images in the database in batches, and save the images in the database as the path. However, if you find that some images do not exist, the Red Cross on the webpage will look ugly. At this time, you can choose to display

There are four short JavaScript scripts below. If you can successfully predict the running results of the script, your basic JavaScript skills are still acceptable. If the answer is incorrect, you can add missing knowledge accordingly. It is also

In a web page, if the page is relatively high, a return top button will be added to help you quickly return to the top. You can view this page. If the page has a scroll height, there will be a small translucent black background with the words "Back

Today, I encountered a problem. When the website is opened under IE 6, the following message is displayed: Internet Explorer cannot open website XXX. The operation has been terminated. First, we will introduce common solutions on the Internet.

I have been studying js recently and have many questions. It is confused by the prototype. The question comes from: function foo {　　this.name = 'foo'; }alert(foo.prototype === Function.prototype ); //false At that time, I never figured out why the

SetTimeout is often used in Javascript to delay the execution of a function, for example: setTimeout(function(){alert("Hello World");},1000); The alert window will pop up one second after this sentence is executed. Let's look at this section

JavaScript tends to block some browser processing processes, such as HTTP requests and interface refresh, which are the most significant performance problems faced by developers. Keeping JavaScript files short and limiting the number of HTTP

JavaScript is an excellent scripting language. This includes the flexibility of the scripting language, as well as the features of many advanced languages. For example, a Garbage collection mechanism (GC: Garbage Collecation) is used to create and

This specification is developed based on the reality that javascript functional programming styles and companies rely heavily on jQuery for coding. Disable the use of eval, with, and caller (use strict requirements of ecma262 v5 ). Eval can only be

It is easy for us to be attracted by beautiful code, and we can add this to our own code library without knowing it. But never calmly think about their advantages and disadvantages. No, I just collected a series of shapes like "is it ......?

The setInterval () method can call functions or computation expressions according to the specified period (in milliseconds. The setInterval () method does not stop calling the function until clearInterval () is called or the window is closed. The ID

It is common to use js or jquery to find parent and child elements. However, it is always confusing to use it. I have summarized it here. It will be easier to use it in the future.Here, jquery looks up the method used by the parent element: closest (