Article Tags
Article Tags
How to create a countdown timer using HTML5 and JavaScript.
The answer is to create a 5 minute countdown with start and reset functions. 1. HTML sets the display area and buttons; 2. CSS beautifies the style; 3. JavaScript implements timing logic, updates the time and prohibits repeated starts; 4. The reset button restores the initial value.
Dec 29, 2025 am 06:10 AM
How to Use the HTML5 File API to Read User Files? (JavaScript Example)
Using HTML5FileAPI to read user files requires three steps: 1. Select by capturing; 2. Get the FileList from event.target.files; 3. Use FileReader or URL.createObjectURL to process the file, and the entire process is completed on the client side.
Dec 29, 2025 am 05:12 AM
How to Use the HTML5 Canvas Element? (Drawing Tutorial)
HTML5 elements are drawn directly in the browser through JavaScript. The width/height attributes need to be set to obtain the 2D context. It supports drawing rectangles, circles, paths, texts, images, etc.
Dec 29, 2025 am 04:10 AM
How to Implement Drag and Drop in HTML5? (A Simple Tutorial)
HTML5 natively supports drag-and-drop functionality without the need for a third-party library; make the element draggable by setting the draggable="true" attribute, use the dragstart event to set the dataTransfer data, and use the dragover and drop events together with preventDefault() to enable the target area and handle delivery logic.
Dec 29, 2025 am 03:38 AM
How to Use HTML5 LocalStorage and SessionStorage? (With Examples)
localStorage is persistent storage, and sessionStorage is limited to the current tab; both are accessed by string key-value pairs, and need to use JSON.stringify() and JSON.parse() to process objects. They are suitable for non-sensitive data such as user preferences, and are prohibited for confidential information such as passwords.
Dec 29, 2025 am 02:52 AM
How to Fix Common HTML5 Validation Errors? (Troubleshooting Guide)
HTML5 validation errors are mainly caused by syntax errors, missing required attributes or misuse of semantic elements; it is necessary to add alt to img, add name to form controls, provide controls or fallback solutions for media elements, and avoid illegal structures such as divs being nested in p.
Dec 29, 2025 am 02:16 AM
What are HTML5 Web Workers and How to Use Them? (Example Included)
WebWorkersenablebackgroundJavaScriptexecutionseparatefromthemainthreadtopreventUIfreezing.TheyoperateinisolatedcontextswithoutDOMaccess,communicateviapostMessage/onmessage,andareidealforheavycomputationslikedataprocessingorencryption.
Dec 29, 2025 am 02:13 AM
How to Build a Contact Form with HTML5? (With Validation Examples)
HTML5contactformsusebuilt-invalidationlikerequired,type="email",andpatternwithoutJavaScript.Labels,semanticstructure,andproperattributesensureaccessibilityandUX,whileCSSpseudo-classesstylevaliditystates.
Dec 29, 2025 am 01:34 AM
How to create a fixed header or footer with HTML5 and CSS? (Layout Tutorial)
UseCSSposition:fixedtolockheaders(top:0)orfooters(bottom:0)inplace;setwidth:100%,z-index,andbackground;adjustmaincontentspacingviamargin-toporpadding-bottomtopreventoverlap,andpreferposition:stickyforscroll-then-stickbehavior.
Dec 28, 2025 am 05:35 AM
How to embed and control YouTube videos using the HTML5 iframe API.
Use YouTubeIFrameAPI to dynamically embed and control videos in web pages. First create a div container containing id="player", then load the YouTubeAPI script asynchronously, initialize the YT.Player object after onYouTubeIframeAPIReady is triggered, and set the video ID, size and event callback. Playback control is achieved by calling player.playVideo(), pauseVideo(), seekTo() and other methods, and combined with onStateChange to monitor the playback status, such as PLAYING, PAUSED, ENDED, etc., to build an interactive
Dec 28, 2025 am 05:15 AM
How to Play Audio Files with the HTML5 Tag? (Simple Example)
Audio can be directly embedded using HTML5 tags, supporting src and controls attributes; multiple formats such as MP3/OGG are provided to improve compatibility; optional attributes such as autoplay (often muted), loop, and preload are supported; CSS styles and JavaScript controls (such as play(), pause()) and event monitoring are supported.
Dec 28, 2025 am 05:04 AM
How to Embed a YouTube Video in HTML5 Responsively? (CSS Trick)
To embed YouTube videos responsively, you need to wrap the iframe with a container with padding-top techniques: the container is set to position:relative and padding-top:56.25% (16:9), the iframe is set to position:absolute and filled with the container, and necessary attributes and optional optimizations are added.
Dec 28, 2025 am 04:07 AM
How to Get Started with HTML5 Game Development? (A Basic Tutorial)
The basics of HTML5 games require canvas, requestAnimationFrame game loop, keyboard event control and clearRect redrawing; examples include player object movement, edge collision and DOM ready loading.
Dec 28, 2025 am 03:43 AM
How to Build a Real-Time Chat Application with HTML5 WebSockets? (Tutorial)
WebSocketsenableinstant,bidirectionalreal-timemessagingviapersistentconnections;setupaNode.jsserverwiththewslibrary,connectfromHTML5usingthenativeWebSocketAPI,handledisconnectionswithreconnectionlogic,andenhanceUXwithlocalstorage,Enter-to-send,andvis
Dec 28, 2025 am 03:00 AM
Hot tools Tags
Undress AI Tool
Undress images for free
AI Clothes Remover
Online AI tool for removing clothes from photos.
Undresser.AI Undress
AI-powered app for creating realistic nude photos
ArtGPT
AI image generator for creative art from text prompts.
Stock Market GPT
AI powered investment research for smarter decisions
Hot Article
Popular tool
vc9-vc14 (32+64 bit) runtime library collection (link below)
Download the collection of runtime libraries required for phpStudy installation
VC9 32-bit
VC9 32-bit phpstudy integrated installation environment runtime library
PHP programmer toolbox full version
Programmer Toolbox v1.0 PHP Integrated Environment
VC11 32-bit
VC11 32-bit phpstudy integrated installation environment runtime library
SublimeText3 Chinese version
Chinese version, very easy to use
Hot Topics
20416
7
13574
4