05 Jul 2025

The method to use loading="lazy" to achieve lazy loading is to add this attribute to the tag, which is natively handled by the browser; its advantages include reducing the initial load of the page, improving performance, and being more conducive to SEO and barrier-free access; when using it, you should avoid lazy loading of the first-screen image. It is recommended to use placeholders to prevent layout jitter, ensure the correct image format, and pay attention to the compatibility of third-party components.

04 Jul 2025

Loading the image to HTML5Canvas requires waiting for the image to load. You can perform drawing operations through the img.onload callback; use the drawImage method to draw a complete image, scale the image or capture a partial image; after drawing, you can use getImageData to obtain pixel data and write back the modified content with putImageData. The specific steps are: 1. Create Image object and set src; 2. Call drawImage in the onload callback to draw the image; 3. Use different parameters of drawImage to achieve image drawing, scaling and cropping; 4. Get the pixel array through getImageData for processing; 5. Use putImag after the processing is completed

07 Jul 2025

How to implement lazy loading of images and iframes in HTML5? By adding loading="lazy" attribute to the and tags, the browser delays loading these elements until they are about to enter the viewport. Applicable scenarios include non-first-screen content at the bottom of the page, gallery or product pages with a large number of pictures, content skipped by mobile terminals in responsive design, and pages with multiple iframes embedded. It is not recommended to use lazy loading for key content on the home screen such as logo or banner. Notes include: 1. When it is compatible with old browsers, you must introduce polyfill; 2. Ensure that the search engine can recognize the image content to avoid SEO influence; 3. Set placeholders to prevent layout jitter; 4. Dynamically inserted pictures need to be manually processed and lazy loaded.

06 Apr 2025

Methods to optimize HTML5 video loading speed: Use modern video codecs (such as VP9, ??H.265) to compress files. Implement an adaptive bitrate video stream to adjust video quality. Download videos in chunks to download in parallel. The video is delayed and does not start loading until the user scrolls. How to adapt HTML5 video on mobile: Ensure that the video codec is compatible with the device. Resize the video container to fit the screen. Select a lower bit rate to reduce buffering. Use responsive design techniques to adjust the layout. Optimize video controls and players to suit touch screen devices.

28 Nov 2024

Async vs. Defer: Optimizing Script Loading in HTML5Understanding Async and DeferThe async and defer attributes provide mechanisms to control the...

04 Jun 2025

CSGO (Counter-Strike: Global Offensive) is a first-person shooter that is loved by players around the world. Its exciting competitions and high-quality special effects videos have always been topics to talk about by players. Whether it is the thrilling professional leagues or the friendly match between ordinary players, it can show amazing special effects and strategies in the game. This article will introduce you in detail how to find and watch CSGO special effects blockbusters in detail to ensure that you can experience the best visual enjoyment.

01 Mar 2025

10 cool jQuery menu special effects plug-ins to improve website user experience! We have shared many jQuery navigation menu plugins, and now we bring you 10 more amazing jQuery menu effects plugins. Enjoy it! Related readings: - 10 dazzling jQuery navigation menus - 15 excellent jQuery navigation menus Right-click menu This plugin is very easy to use and compact, allowing you to create right-click menus. Source Code Demo 2. jQuery Multi-level Menu – FX CSS Menu with Submenu 100% CSS menu, visual effects provided by jQuery. Only use Javascript to implement special effects. Fully compatible with cross-browser, package

12 Apr 2025

There are two types of items in Blue Prince: Common and Special. Common items are easier to find and usually tied to specific room types. Special items are rarer, but they offer powerful effects or let you reach areas you couldn’t access otherwise.Co

05 Apr 2025

CSS style problem: Implement white edges in text and add shadow effects. In CSS style design, special processing of text is often required, such as adding white edges...