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Course Introduction：To add loading animation to a web page, first create an animation structure and set the style with HTML and CSS, and then hide the animation after the page loading is completed through JavaScript. The specific steps are as follows: 1. Create an HTML structure for loading animations, such as a div containing a rotating icon; 2. Use CSS to set animation styles, including centered display, background color and animation effects; 3. Listen to the window.onload event through JavaScript, and hide the animation after the page resource is loaded; 4. You can combine the DOMContentLoaded event or imagesLoaded library to achieve more accurate load control; 5. Pay attention to avoiding animations hindering user interaction, adapt to mobile terminals and optimize page loading

2025-07-13 comment 0  158

Course Introduction：requestAnimationFrame (rAF) is more suitable for animation than setTimeout or setInterval because it is synchronized with the browser refresh mechanism to achieve smoother and more efficient animation effects. ① rAF will call the specified function before the next repaint of the browser, usually execute at a frequency of 60 frames per second to make the animation smoother; ② When the tab page is not in the foreground, it will automatically pause and save resources; ③ When using it, start the animation loop by recursively calling requestAnimationFrame and stop avoiding memory leaks under appropriate conditions; ④ Pay attention to avoid frequent operation of DOM, it is recommended to use high-performance properties such as transform and use the timestamps received by the callback function for precise control; ⑤

2025-07-03 comment 0  204

Course Introduction：To create a dynamic navigation bar in Bootstrap, follow these steps: 1. Include Bootstrap files, hosted via CDN or locally. 2. Create a basic navigation bar structure and use Bootstrap's navbar component. 3. Use JavaScript to achieve dynamic effects, such as displaying or hiding the navigation bar according to the scroll position. 4. Adjust the responsiveness and use different breakpoint classes such as navbar-expand-lg. 5. Customize the appearance and animation effects of the navigation bar through CSS. 6. Ensure the performance and accessibility of the navigation bar, test different devices and add ARIA tags. Through these steps, you can create a dynamic navigation bar that is both beautiful and enhances the user experience.

2025-07-16 comment 0  189

Course Introduction：To adjust the Dock on Mac according to usage habits to improve efficiency, you can follow the following steps: 1. Adjust the size and position: Go to "System Settings" > "Desktop and Dock", check "Automatic Show and Hide Dock", slide the bar to adjust the icon size; select the left, bottom or right place in "Dock Position". 2. Add or remove apps and folders: Drag the app from "Applications" to the Dock, and drag out the outside of the icon to remove the item. 3. Customize behavior and animation effects: Set click icon to display recent documents, window thumbnail previews, and use dividers or empty launchers to improve organization and quickly return to the desktop. Turning on the auto-hide function helps save screen space and make your work more focused.

2025-07-12 comment 0  386

Course Introduction：The Windows keys are usually located between the Ctrl and Alt keys on the bottom row of the keyboard, close to both sides of the space bar. It is marked with the Windows logo (an icon similar to a four-grid window frame), which is commonly found on a standard PC keyboard, with one on each side of the left and right; the laptop keyboard usually has one on the left and may be slightly smaller; the Mac keyboard is replaced by the Command key in BootCamp mode; its functions can be achieved through software remapping of non-Windows keyboards. Press the Windows key to open the Start menu, such as Windows D display desktop, Windows E launches file explorer, Windows L locks the computer, Windows Tab opens the task view, providing a variety of improved operational effects

2025-07-11 comment 0  919

Course Elementary  13772

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  82280

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  13144

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  24590

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  27446

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.