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Course Introduction：The key to H5 page performance optimization is to improve loading speed and user experience. 1. Reduce the amount of resources loaded on the first screen, compress pictures, merge script styles, use lazy loading and on-demand introduction; 2. Use the caching mechanism to improve the secondary access speed through Cache-Control, ETag and ServiceWorker; 3. Optimize the rendering process, use the skeleton screen, avoid inline script blocking, and perform JS tasks in segments; 4. Use asynchronous loading and preloading reasonably, such as lazy image loading, interface pre-request and static resource pre-loading, so as to achieve faster and smoother page display.

2025-07-22 comment 0  564

Course Introduction：Lazy image loading is a technology that delays loading non-first-screen image resources. By loading images only when the user scrolls to the relevant area, it improves page loading speed and user experience. Its core implementation is to use the loading="lazy" attribute of HTML. Modern browsers natively support this function without relying on JavaScript plug-ins. 1. Lazy loading is suitable for long pages, galleries or social media pages, hidden pictures in responsive designs, etc.; 2. Pay attention to adding alt attributes when using them to ensure SEO and accessibility; 3. Placeholders or fixed heights should be set through CSS to avoid layout jitter; 4. Reasonable control of the loading order to ensure that core images are loaded first; 5. It should be different

2025-07-21 comment 0  507

Course Introduction：The pitfalls of H5 page production include: a lack of basic HTML, CSS, and JavaScript knowledge, resulting in a lack of understanding of the principles. Over-reliance on visualization tools is impossible to deal with complex situations. Ignore the features of H5 such as lightweight, flexibility, and high performance and compatibility requirements. The image is loading slowly and the page is stuttering, so you need to compress the image and use lazy loading. Compatibility issues need to be fully tested to ensure normal display. Performance optimization, focus on loading speed, use test tools to optimize. Code readability and maintainability, write clean and tidy code for easy modification.

2025-04-06 comment 0  1078

Course Introduction：The core of LCP optimization is to accelerate the loading of key content on the first screen and reduce rendering blockage. 1. Load key resources on the first screen in advance, use WebP/AVIF format, fix image size, use lazy loading reasonably, and check the CDN acceleration effect; 2. Reduce blockage items on the key rendering path, split non-critical CSS, asynchronous loading of JS, and give priority to server-side rendering to speed up first screen rendering; 3. Use font loading strategies reasonably, use font-display:swap, streamline word weight and character set, compress font files, or use system fonts to reduce loading delay.

2025-07-17 comment 0  471

Course Introduction：The core of optimizing front-end resource loading is to reduce volume, utilize cache, parallel and on-demand loading, and use CDN. 1. Compress resources, compress text with Gzip/Brotli, convert pictures to WebP and delete redundant code; 2. Set cache policies, static resources plus Hash to cooperate with long cache, HTML short cache or negotiated cache; 3. Split requests, multi-CDN domain names, routing-level code segmentation, lazy image loading, and JS asynchronous loading; 4. Deploy CDN to cover the target user area, and process dynamic content in combination with edge computing. These methods can significantly improve performance and improve user experience.

2025-07-16 comment 0  111

Course Elementary  13782

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  82302

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  13151

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.

Course Elementary  24597

Course Introduction：In the "AngularJS Chinese Reference Manual", AngularJS extends HTML with new attributes and expressions. AngularJS can build a single page application (SPAs: Single Page Applications). AngularJS is very easy to learn.

Course Elementary  27460

Course Introduction：Go is a new language, a concurrent, garbage-collected, fast-compiled language. It can compile a large Go program in a few seconds on a single computer. Go provides a model for software construction that makes dependency analysis easier and avoids most C-style include files and library headers. Go is a statically typed language, and its type system has no hierarchy. Therefore users do not need to spend time defining relationships between types, which feels more lightweight than typical object-oriented languages. Go is a completely garbage-collected language and provides basic support for concurrent execution and communication. By its design, Go is intended to provide a method for constructing system software on multi-core machines.