How does jquery remove css styles?
jquery css Write your review! Spit it out, see everything Member Login | User Registration recommended reading jquery B/S version of the electronic medical record system source code front-end and back-end separation mode development and deployment The electronic medical record system is a medical special software. The hospital electronically records the patient’s medical information through the electronic medical record … [detailed] Crayon Shinchan 2023-08-27 12:17:36 jquery js web page countdown is accurate to the second level The real-time countdown of the web page is accurate to the second level, which is the same as the countdown principle of the number of days. A very useful js countdown! The real-time countdown of the web page is accurate to the second level, which is the same as the countdown principle of the number of days. js countdown is generally used for group buying and special sales on mall websites, and it can be used in many places! … [detailed] Crayon Shinchan 2023-08-27 12:14:42
Understanding Object Prototypes and Prototype Chains in JavaScript
This article will introduce you to object prototypes and prototype chains in Javascript. There is a certain reference value, and friends in need can refer to it, and I hope it will be helpful to everyone. Object prototype I believe everyone has used map like this: let arr = [0, 1, 2] let doubleArr = arr. map(c => c * 2) console.log(doubleArr) // 0, 2, 4 I don’t know if you have thought about it, arr itself does not set the map attribute , then why can we use the map function? Print it out to see: console.log(arr) // 0: 0 // 1: 1 // twenty two // length: 3 // __proto__: Array(0) There is an object named __proto__, if you expand it, you will see all the functions that can be used by Array objects; of course We can also find the map function in it, and this is the arr.map function called in the example: console.log(arr.map === arr.__proto__.map) // true The __proto__ object that appears here is the so-called Prototype. Different from Java, C# and other class-based (Class) object-oriented languages, properties and methods are passed by defining classes, creating instances, specifying inheritance, etc.; Javascript is a Prototype-based pairing…
Understand how asynchrony is handled in JavaScript
In website development, asynchronous events are a part of the project that must be dealt with, and because of the rise of front-end frameworks, SPA implemented through frameworks is already a standard configuration for quickly building websites. It has become an indispensable part; this article will talk about the asynchronous processing method in Javascript. Synchronization? asynchronous? First of all, of course, we must first understand what synchronous and asynchronous mean. These two nouns are always confusing for beginners. After all, the literal meaning of Chinese is easy to be reversed. It is doing one thing at a time, and asynchronous is the processing of many things together in parallel. For example, when we go to the bank to handle business, queuing in front of the window is synchronous execution, and getting the number to do other things first is asynchronous execution; through the characteristics of Event Loop, asynchronous events in Javascript can be executed Easy to say So what is the way to handle asynchronous events in Javascript? Callback function What we are most familiar with is the callback function. For example, the event listener registered when the web page interacts with the user needs to receive a callback function;…
5 TypeScript Design Patterns You Need to Know
This article introduces 5 TypeScript design patterns. There is a certain reference value, and friends in need can refer to it, and I hope it will be helpful to everyone. Design patterns are templates that help developers solve problems. There are too many patterns covered in this book, and they often target different needs. However, they can be divided into three distinct groups: Structural patterns deal with relationships between different components (or classes) and form new structures, to provide new functionality. Examples of structural patterns are Composite, Adapter, and Decorator. Behavioral patterns abstract the common behavior between components into an independent entity. Examples of behavioral patterns are commands, policies, and one of my personal favorites: the Observer pattern. Creation mode focuses on the instantiation of classes, making it easier for us to create new entities. I’m talking about factory methods, singletons and abstract factories. Singleton pattern The singleton pattern is probably one of the most famous design patterns. It is a creational pattern because it ensures that no matter how many times we try to instantiate a class, we only have one instance available. Singleton patterns for handling things like database connections, since we want to handle one at a…
Understanding Readable Streams in NodeJS
What is a readable stream A readable stream is used for production data A stream for program consumption. Our common data production methods include reading disk files, reading network request content, etc. Let’s take a look at the example of stream usage introduced earlier: const rs = fs.createReadStream(filePath); rs is a readable stream, the way to produce data is to read disk files, our common console process.stdin is also a readable stream: process.stdin.pipe(process.stdout); You can print out the console input through a simple sentence, process.stdin The way to generate data is to read user input at the console. Look back at our definition of readable streams: readable streams are streams that produce data for program consumption. Custom readable stream In addition to the fs.CreateReadStream We also often use the src method provided by gulp or vinyl-fs gulp.src(['*.js', ' 39;dist/**/*.scss']) If we want to produce data in a specific way and hand it over to the program for consumption, how do we start? Just two simple steps Inherit the Readable class of the sream module Rewrite _read method, call this.push to put the produced data into the queue to be read The Readable class has completed most of the work to…
How does require() work in Node.js? Working principle introduction
php Write your review! Spit it out, see everything Member Login | User Registration recommended reading text Create a circular class, including set and get methods usingSystem;usingSystem.Collections.Generic;usingSystem.Linq;usingSystem.Text;usingSystem. … [detailed] Crayon Shinchan 2023-08-27 12:36:42 text [Short and Medium Story] Colorless Dazzling (1) I walked out of the dimly lit hut, how to set the a shortcut key. The moonlight outside is so bright that it almost melts me. How to set the shortcut a… [detailed] Crayon Shinchan 2023-08-27 12:35:44
