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Article Introduction：How to use native JS to achieve the effect of membership of enterprise WeChat tree organization? In modern web development, the display demand of tree structures is very common, especially...

2025-04-05 comment 0  517

Article Introduction：The answer is: you should first master native JavaScript and then learn the framework. Because frameworks are just tools, JS is the foundation, not understanding JS will make it difficult to troubleshoot bugs and deal with interview questions; understanding native JS can help you better understand the design ideas of the framework; learning to be able to operate DOM, handle events, use Promise, understand this and prototype chains, and write simple interaction functions can start learning the framework; it is recommended to start with HTML CSS native JS first, learn while doing, read more documents, read less quick courses, and write projects by hand.

2025-07-01 comment 0  564

Article Introduction：ShadowDOM is a browser-native component encapsulation mechanism used to isolate structures and styles; VirtualDOM is a programming technique that optimizes UI updates. 1. ShadowDOM belongs to WebComponents, creates independent and isolated DOM trees to prevent style pollution, and is suitable for building reusable components such as or. 2. VirtualDOM is implemented by frameworks such as React, which simulates real DOM in memory, minimizes update operations through the Diff algorithm, and improves performance. 3. The core difference between the two is their different functions: ShadowDOM focuses on packaging, while VirtualDOM focuses on efficient updates; different implementation methods: the former is native browser support, while the latter is JS simulation; application field

2025-07-07 comment 0  410

Article Introduction：Webpack is suitable for large applications, with comprehensive functions but complex configuration; Rollup focuses on packaging libraries, with small output size and strong Tree-shaking; Vite is based on native ES modules, with fast development speed and suitable for modern frameworks. 1. Webpack is centered on "Everything is a module" and supports code segmentation and rich plug-ins. It is suitable for complex projects but slow to build; 2. Rollup supports ESM by default, outputs clean code, suitable for NPM library release, but weakly handles non-JS resources; 3. Vite uses browser native ESM, does not package in the development stage, starts quickly and supports mainstream frameworks, suitable for new projects, but TS and migration support needs to be improved.

2025-07-17 comment 0  161

Article Introduction：WebAssembly (Wasm) is a binary instruction format suitable for image and video processing due to its near-native execution speed. 1. It supports compiling into intermediate formats in multiple languages, and runs efficiently in the browser; 2. Image and video processing involves a large amount of calculations, and Wasm is more efficient than JavaScript; 3. Select language and tool chain when using it, encapsulate functions to receive image data, and JS passes data to Wasm for processing and then passes the results back; 4. Video processing requires controlling frame rate, synchronization and memory management, JS grabs frames and passes them to Wasm for processing and then synthesis; 5. Pay attention to data format conversion, memory allocation and release, performance bottleneck positioning, and browser compatibility issues.

2025-07-17 comment 0  974

Article Introduction：1. When reading cookies, you can get a string through document.cookie and parse it into an object; 2. When setting cookies, you need to assign a value to document.cookie and add expiration time, path and other options; 3. When deleting cookies, you need to set the expired time and ensure clearing through the same path domain name; 4. Notes include not having sensitive information, processing encoding, limiting length and adding security attributes. The full text revolves around the methods and details of native JS operating cookies.

2025-07-15 comment 0  653

Article Introduction：A practical guide to improving the performance of React Native applications Key Points Balancing the animation processing of JavaScript (JS) threads and main threads to improve application performance. Use the useNativeDriver attribute and InteractionManager to manage this balance. Avoid unnecessary component re-rendering. Tips include: memorizing components and functions, using useCallback wisely, avoiding updating local states with Redux states, and avoiding inline functions. Optimize images to increase application speed. Use SVG icons and images, WebP image format (lossless image quality), and cache images to speed up rendering. Using stable npm packages and Fla

2025-02-08 comment 0  399

Article Introduction：Nanny State: A streamlined Vanilla JS state management library Nanny State is a mini library designed to simplify the process of building state-based web applications using native JavaScript. It's similar to React, but with less overhead, no need to learn new syntax. It uses a single application-wide state object instead of letting each component have its own state. It was inspired by HyperApp and has many similarities with Elm. This article will explain how Nanny State works and demonstrate its functionality with several examples. Key points: Nanny State Introduction: Nanny S

2025-02-09 comment 0  327

Article Introduction：JavaScript library is a pre-written collection of code used to help developers complete common tasks efficiently. Its core functions include: 1. Simplify DOM operations; 2. Handle user interaction; 3. Send HTTP requests. Popular JS libraries include: 1.jQuery is suitable for small projects or legacy systems; 2.React is suitable for building dynamic user interfaces; 3.Vue.js is suitable for progressive integration; 4.Axios simplifies API calls. Learning suggestions: 1. If you want to master the basics, you must first learn native JS; 2. jQuery is available for small websites; 3. React is the first choice for modern front-end development; 4. Axios can be selected only if you need API calls. It is recommended that most developers give priority to learning React, but the premise is to master variables and cycle

2025-06-27 comment 0  211

Article Introduction：WebAssembly (WASM) is a binary format that runs in a browser, suitable for CPU-intensive tasks. The reasons include: 1. Fast execution speed and close to native code; 2. Supports multiple system-level languages such as Rust and C; 3. Runs in a secure sandbox; 4. Cross-platform compatibility. The key steps to integrate WASM into front-end projects are: 1. Select toolchains such as Rust and wasm-pack; 2. Write and export Rust functions; 3. Compile into .wasm files; 4. Load and call them on the front-end. Applicable scenarios include pure computing tasks such as image processing, encryption, data compression, etc., and the performance can be 5 to 10 times higher than JS. However, tasks such as DOM operations that rely on browser APIs should still use JS

2025-07-19 comment 0  445

Article Introduction：The new HTML5 input type improves the form experience, the main methods include: 1. Use email and url types to realize automatic format verification and optimize the mobile keyboard; 2. Use number and range to process numerical input, which are suitable for accurate values ??and sliding selection respectively; 3. Use date series types to call the native date selector to improve time input efficiency. These features reduce the burden of front-end verification, but basic verification still needs to be supplemented by the server. Some types need to be combined with JS libraries to ensure compatibility on old devices.

2025-07-11 comment 0  385

Article Introduction：Why choose H5 micro front-end? Because it can split large applications into small independent modules, improve development efficiency and reduce maintenance costs, it is suitable for projects with frequent team collaboration and fast changes in demand. Advantages include flexibility in the technology stack (supports React, Vue, native JS), support for rapid iteration (local updates do not affect the overall situation), and team decoupling (clearer internal work between the front and back ends and the front end). 1. The main sub-application loading mechanism is recommended to use a JS runtime loading scheme similar to qiankun, which supports life cycle management; 2. The route management is recommended to use sub-application self-management routing to maintain integrity and facilitate migration; 3. The communication mechanism can be encapsulated through a unified interface, using event bus or shared state objects, avoiding direct operation of windows. Other things to note

2025-07-19 comment 0  429

Article Introduction：When using HTML5 inputtype="date", the core reasons and solutions for inconsistent date format display are as follows: 1. You must always use the YYYY-MM-DD format to set and get the value, otherwise it may cause recognition failure; 2. The browser display format varies according to system and region settings, but does not affect the actual value; 3. If you need to uniformly display the format, you should use a third-party library to replace the native controls; 4. Server-side verification is required and a fallback solution is provided for unsupported browsers, such as using the text type to cooperate with the JS plug-in to handle it.

2025-07-05 comment 0  580

Article Introduction：How to set custom error message with JavaScript? 1. Use the setCustomValidity() method combined with native form verification, and set prompts for specific input conditions through JavaScript. For example, when the username is less than 3 characters, it prompts "the username needs at least 3 characters"; 2. Combine HTML attributes (such as required, pattern) and JS supplementary verification, and return targeted prompts according to different reasons for verification failure. For example, when the email format is inconsistent, "the email must end with @example.com"; 3. Note that after each verification, you need to call setCustomValidity('') to clear the error message and select the appropriate event (input and i)

2025-07-12 comment 0  487

Article Introduction：Bun is a modern JavaScript/TypeScript runtime designed to provide faster performance and built-in toolset than Node.js. 1. It uses the JavaScriptCore engine, which starts faster and has lower memory footprint; 2. It has built-in packager, test framework and dependency manager, without additional installation tools; 3. It is compatible with some Node.js API, suitable for fast script development, small services and simplified building toolchain; 4. It is simple to install and use, and supports running JS/TS/JSX files and dependency installation; 5. It is currently suitable for projects that do not rely on complex Node.js native modules, and is not yet suitable for large production environments.

2025-07-16 comment 0  487

Article Introduction：WebGPU is the preferred solution for H5 to implement PBR because it provides the underlying GPU access capability and supports high-quality lighting and material effects. 1. Support prerequisites include browser compatibility (Chrome and Edge native support) and using WGSL to write shaders to process albedo, metallic and other properties; 2. The rendering process includes preparing G-Buffer, sampling textures and fragment shaders BRDF calculations, and combining IBL technology to enhance the sense of reality; 3. Optimization suggestions include multiplexing texture channels, rational use of Mipmap, dynamic adjustment of quality levels, early compilation of shaders, and paying attention to memory management; 4. Recommended tools include wgpu-js, Babylon.js and glTF standard model formats,

2025-07-16 comment 0  608

Article Introduction：The performance optimization of the front-end mobile terminal needs to be based on the characteristics of the mobile terminal. 1. Reduce the number of requests and resource volume on the first screen, including merging JS/CSS files, using on-demand loading, compressing pictures and selecting appropriate formats; 2. Use caching strategies to reduce duplicate loading, such as setting up HTTP cache headers, using ServiceWorker precache, and local storage of interface data; 3. Optimizing rendering performance and interactive experience, avoiding forced synchronization of layouts and long tasks, simplifying page structure, and delaying non-critical animations; 4. Use lightweight frameworks and modern features, such as choosing Preact/Svelte, enabling TreeShaking, using native APIs, enabling HTTP/2 and Brotli compression.

2025-07-20 comment 0  391

Article Introduction：To create a standout JavaScript portfolio, choosing a project that demonstrates technical capabilities and problem-solving capabilities is the most important thing. 1. Build a to-do application with local storage, covering task addition and deletion, completion status, local saving, and can add filtering, drag-and-drop sorting or dark modes. 2. Use the API to create a weather dashboard, obtain user locations, display weather data, and support city search and error handling. 3. Develop a mini game such as tic toe or memory matching game to exercise logic and state management. 4. Use native JS or framework to build a personal portfolio website, including about me, project display and contact forms. Ensure that each project has complete functions, clear documentation, diverse technologies and easy to run, and finally deploy and display your strength online.

2025-07-07 comment 0  267

Article Introduction：H5WebAssembly makes porting game engines to the web page efficient and practical because their performance is close to native and can interact seamlessly with JavaScript. Its core advantages include high execution efficiency, fine memory control, and cross-platform compatibility; better performance than asm.js, supports reuse of C/C code bases, and simple deployment without plug-ins. Common challenges in porting are: 1. The graphics API does not support WebGL/WebGPU, and use it instead; 2. The file system is restricted and requires a virtual file system or IndexedDB; 3. The thread support is unstable and needs to be handled with caution; 4. Audio and input events need to be bridged through JS. The recommended steps to start the porting are: 1. Use the Emscripten toolchain; 2. Verify from small modules

2025-07-17 comment 0  692

Article Introduction：SqlParameter Parameters.Add vs. AddWithValue: Choosing the Best MethodWhen working with SQL commands, you may encounter the need to add...

2025-01-10 comment 0  675