国产av日韩一区二区三区精品,成人性爱视频在线观看,国产,欧美,日韩,一区,www.成色av久久成人,2222eeee成人天堂

Course Introduction：Animation loading special effects implemented in pure css3

2016-06-24 comment 0  1414

Course Introduction：Based on css3 cool page loading animation special effects code

2016-06-24 comment 0  1941

Course Introduction：Show off! A set of CSS loading progress prompt effects implemented by a single element

2016-06-24 comment 0  1088

Course Introduction：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.

2025-07-07 comment 0  396

Course Introduction：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.

2025-04-06 comment 0  446

Course Elementary  13745

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  82260

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  13130

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  24578

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  27436

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.