Course Introduction：To play audio or video using the HTML5 media API, you must first use or elements and control it through JavaScript; 1. The basic setting is to add media tags and optionally include controls; 2. To control the playback status through JavaScript calls .play() or .pause() methods, but it should be noted that the browser usually requires users to interact before allowing automatic playback; 3. To respond to playback status changes using event listeners such as 'play', 'pause', 'ended'; 4. Consider cross-browser compatibility, provide support for multiple media formats, and handle mobile restrictions and preload behaviors.
2025-06-26 comment 0 947
Course Introduction：How to play a live stream using HTML5: Create a Video element and set its src attribute to the live stream URL. Listen to the error event to catch playback errors. Take appropriate actions based on the error code, such as retrying the connection or displaying an error message.
2025-04-06 comment 0 700
Course Introduction：If you want to know the current playback time and total duration of the video, the method varies by platform. 1. In a web browser, you can directly view the video control bar to get the current time and total time; developers can use JavaScript code to read HTML5 element information. 2. In the mobile app, click the screen display control bar to roughly determine the current playback position and total duration, but the precise data requires professional tools to analyze. 3. Local players such as VLC, MPV, etc. will directly display the current time and total time on the interface, and you can also view detailed metadata through media information. There are ready-made solutions in different environments, and the details are easily overlooked but the operation is not complicated.
2025-06-21 comment 0 336
Course Introduction：Poster attributes are used in HTML5 to specify the preview image displayed before the video starts playing, which is implemented by adding an image URL to the tag. When using it, you need to ensure the correct path. The picture should be a high-quality keyframe screenshot to avoid blurred or overly dark images, and optimize the loading speed; some browsers or mobile devices may not display posters due to fast video loading, dynamic src or automatic playback restrictions; posters can be scaled through CSS, but the style is restricted directly. Reasonable selection and processing of posters can improve the user experience.
2025-06-22 comment 0 863
Course Introduction：The browser limits HTML5 media autoplay for user experience. Starting from Chrome 66, only silent automatic playback is allowed, and Safari and Firefox policies are stricter. Solutions include: 1. Mute by default and provide an unmute button; 2. Listen to the user to play a sound video after the first interaction; 3. When the iframe is embedded with the muted=1 parameter; 4. The mobile terminal needs to add the playsinline attribute. JS controls errors when playing, ensures that user interaction triggers and is compatible with promises from different browsers.
2025-07-04 comment 0 288
Course Elementary 13742
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 82249
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 27435
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.
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