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Course Introduction：This tutorial demonstrates a simple yet effective method for displaying a digital clock on your webpage using jQuery. The clock dynamically updates every second, providing a continuously refreshed time display. Here's the jQuery code: function updat

2025-03-04 comment 0  481

Course Introduction：Today, I will share a simple way to implement cloning and removing tr dynamically and how to keep the last tr without removing it. *Requirements Below: * A Selector to append TR add/remove selector class JS Code $(document

2025-01-05 comment 0  777

Course Introduction：CSS-in-JS is a method of writing CSS styles directly in JavaScript or TypeScript code. 1. It avoids global conflicts by defining styles within components; 2. Use libraries such as styled-components or Emotion to support dynamic styles, pseudo-classes and media queries; 3. Provide scope styles, dynamic customization, code co-location and theme support; 4. However, there is runtime overhead, package size increase, SSR complexity and learning costs; 5. Applicable to complex and dynamic React applications, but traditional CSS or Tailwind may be better in simple projects. Therefore, CSS-in-JS provides a powerful component style solution, but requires trade-offs on performance and complexity

2025-07-31 comment 0  302

Course Introduction：There are two ways to add JavaScript to HTML: write JS directly in HTML or introduce external JS files. 1. Writing JS directly is suitable for simple scripts or tests, wrapping code with tags, it is recommended to put it in front, or in the defer/async attribute to avoid blocking rendering; 2. External JS files are more common, and are introduced through src to separate HTML and JS, which is convenient for maintenance and reuse; 3. Use async or defer to improve performance. Async is used for scripts that do not rely on DOM, and execute after loading, and then execute in order after defer and other HTML parsing is completed; 4. It is recommended to put scripts in front, if you use defer/async, you can put them, but avoid inserting them into the middle of the body to avoid affecting the rendering stream

2025-07-02 comment 0  409

Course Introduction：Emscripten is the preferred toolchain for compiling C/C code into WebAssembly and running in the browser. 1. It is recommended to use emsdk management during installation, cloning and activating the latest version through git, and configuring environment variables; 2. After writing a simple C program, use the emcc command to compile and generate .wasm or .js files; 3. If the browser has no output, you need to add EXPORTED_FUNCTIONS parameters and ensure that the HTML has a display container; 4. Complex projects support Makefile or CMake, and can link SDL2 and other libraries; 5. Debugging is recommended to add -g parameters to retain source code information, and performance optimization should reduce the interaction between JS and Wasm, use -O3 optimization level to avoid frequency

2025-07-30 comment 0  920

Course Elementary  13819

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  82352

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  13173

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  24624

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  27483

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.