JavaScript

Promise is a good choice when dealing with asynchrony, reducing nesting levels, making code more readable, and logic clearer. ES6 adds it to the specification, JQuery 3.0 also modifies implementations to move closer to the specification (3.0 post

This is one of the key words in JavaScript and is often used when writing programs, and it is especially important to understand and use the keyword correctly. The first thing you have to say is that this point is not certain when the function is

What is window framing? Window framing is to separate a browser document window into multiple windows, each window can display a separate page file, each frame (that is, the page) has its own URL. How do I create a frame window? Frames are

The examples in this article describe the way JavaScript asks for a date difference. Share to everyone for your reference, specific as follows: Difference between two date days: number of days of the date string, before-after,

In my usual development of the Web page, may involve the local storage browser, now the mainstream browser storage methods are: Cookies, directly read Xml,userdata,h5 localstorage, cookies, storage data is limited, But it is quite convenient to

First, the concept of factory model The factory pattern defines an interface for creating objects that the subclass determines which class to instantiate. This pattern delays the instantiation of a class to a subclass. A subclass can override an

Examples of this article describe the JavaScript implementation of the compact Tetris. Share to everyone for your reference, specific as follows: Let's take a look at the running effect chart: The full instance code is as follows:

Grammar Metacharacters: (pattern) function: grouping for repeated matches Attribute $1~$9 If it exists, it is used to get the substring matched in the corresponding packet \1 or used to match the contents of the first group \2 or $ is used to

This article describes the JavaScript simple implementation of mouse movement to switch the image of the method. Share to everyone for your reference, specific as follows: javascript Toggle Picture because of the larger picture, please

The example in this article tells you how to add a form to a scroll bar in JavaScript. Share to everyone for your reference, specific as follows: Two ways to achieve this: First type: This advertisement for lease The second type:

Good friends, we've already explained the basics of JavaScript, starting with today's content, and we're going to start talking about encapsulation, and here we have 1.1-point access to OOP (object-oriented programming), and if programmers used as a

The principle is very clear in the code, let's look at the code example directly: var ages = array.map (function (obj) {return obj.age;}); ages = Ages.filter (function (v,i) {return Ages.indexof (v) = = i;}); Console.log (ages); => [17, 3

The link to parsing XML using jquery is Http://www.jb51.net/article/54842.htm, and the last article explains the way jquery and string transform each other. The JavaScript operation XML is discussed here. The total code is as follows: var

1, according to user-agent judgment JS gets user-agent window.navigator.userAgent if (window.navigator.userAgent.match (/micromessenger/i) = = " Micromessenger ") //php gets user-agent echo $_server[' http_user_agent ']; if

JSON is the native format of JavaScript, which means that processing JSON data in JavaScript does not require any special APIs or toolkits. JSON syntax JSON is constructed in two structures: Object-A collection of name/value pairs. In different

The asynchronous upload file is for a better user experience and a skill that must be mastered by each front-end. Here I present three points about how to upload an asynchronous file. Use third party controls, such as Flash,activex browser plug-ins

Nonsense not much said, directly to everyone paste JS code, the specific code as follows: Untitled Document div instance text changestyle () function Changestyle () { var div = document.getElementById ("div"); Div.classname =

First, insert style with JavaScriptSometimes we need to use JS to dynamically generate the CSS code in the style tag on the page, the way is directly to create a STYLE element, then set the CSS code inside the style element, and finally insert it

The example in this article implements a countdown function. Countdown function, used in the project release time, or an activity to do countdown and so on highlighting the time function aspects.Interface code structure, the first to complete well.

In many sites that need to be searched, there will be a search box that is automatically completed. Make it easy for users to find the search terms they want. Help users quickly find the results they want. This way is more friendly. So it is more