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Course Introduction：This article introduces Redux, a JavaScript framework for managing application state, using a simplified shopping cart example. It emphasizes the importance of immutability in JavaScript and demonstrates how to avoid unexpected bugs when working wit

2025-02-16 comment 0  471

Course Introduction：Each product has an id, title, and price. Every time I click to buy, I add it to the array. But I want to judge based on the ID. When adding a product to the shopping cart repeatedly, add the same product to a two-dimensional array. How to write it? {Code...} Thank you everyone, it is true that my idea is very spicy...

2016-07-06 comment 0  1076

Course Introduction：I've just finished creating a front end shopping cart web app using HTML, CSS & vanilla JavaScript. Because I love buying veg at my local grocers', I based it on a the idea of a farm shop called Finley's Farm Shop. To click around on the projec

2024-12-18 comment 0  757

Course Introduction：When the picture does not need to be described, there are three main situations: First, the picture is only decorative elements, such as background patterns or icons with no practical significance, and it will not affect information transmission after deletion; Second, the picture content has been clearly described in adjacent text to avoid repeated interference with screen reader users; Third, the picture is used as part of a button or link, and there are texts next to it to illustrate its function, such as a magnifying glass icon or shopping cart icon next to the search box. The rational use of the alt attribute can improve the accessibility and SEO effect of web pages. The key is to judge whether the picture has substantial significance.

2025-06-29 comment 0  628

Course Introduction：Tree-shaking is a technology that optimizes JavaScript applications by removing unused code. 1. It relies on the static structure of the ES6 module, analyzes and excludes unreferenced functions, variables or components during construction; 2. Vite uses Rollup for production construction, automatically performs tree-shaking, while VueCLI implements similar functions based on webpack; 3. To maximize the effect, ES modules should be used, avoids side effects, splits large files, only introduces required modules, and uses third-party libraries with caution. This technology significantly reduces package size and improves application performance.

2025-06-06 comment 0  372

Course Advanced  8701

Course Introduction：The main purpose of "JavaScript Implementing Shopping Cart" is to make a simple shopping cart so that everyone can understand the principle of the shopping cart during the production process.

Course Advanced  14939

Course Introduction："Javascript Developing Shopping Cart Tutorial" will introduce how I implement the product shopping cart function. Whenever we purchase products on a certain website, which product we like, we will add it to the shopping cart and finally settle the bill. . The shopping cart function

Course Elementary  13744

Course Introduction：Scala Tutorial Scala is a multi-paradigm programming language, designed to integrate various features of object-oriented programming and functional programming.

Course Elementary  82260

Course Introduction："CSS Online Manual" is the official CSS online reference manual. This CSS online development manual contains various CSS properties, definitions, usage methods, example operations, etc. It is an indispensable online query manual for WEB programming learners and developers! CSS: Cascading Style Sheets (English full name: Cascading Style Sheets) is an application used to express HTML (Standard Universal Markup Language).

Course Elementary  13130

Course Introduction：SVG is a markup language for vector graphics in HTML5. It maintains powerful drawing capabilities and at the same time has a very high-end interface to operate graphics by directly operating Dom nodes. This "SVG Tutorial" is intended to allow students to master the SVG language and some of its corresponding APIs, combined with the knowledge of 2D drawing, so that students can render and control complex graphics on the page.