Article Tags
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How to build a basic shopping cart with HTML5 sessionStorage.
First use HTML to create a list of products. Each product contains a name, price and "add to cart" button. The product data is stored in stringified JSON format through JavaScript's sessionStorage, so that the data remains after the page is refreshed. Define the addToCart function to add items to the shopping cart, internally obtain or initialize the shopping cart array, add new items and update sessionStorage. The updateCart function is called after each operation, which reads data from sessionStorage and dynamically generates a shopping cart list, while calculating the total price and updating the page display. Set the clearCart function to clear the shopping cart and load the page
Dec 22, 2025 am 04:34 AM
How to Build a Simple Game with HTML5 Canvas? (Beginner's Tutorial)
Using HTML elements and JavaScript 2D context, draw rectangular players through clearRect and fillRect, combined with keydown event monitoring and requestAnimationFrame game loop, to achieve 60FPS keyboard-controlled movement.
Dec 22, 2025 am 04:28 AM
What is the HTML5 and Tag? (How to Use It)
HTML5 is the fifth major revision of the HTML language, including semantic tags (such as, ), multimedia elements (, ), form enhancements, APIs and other basic functions of modern Web development.
Dec 22, 2025 am 04:21 AM
How to create a color picker using the HTML5 input type? (Code Example)
Use a native, accessible system-level color picker to create a native, accessible system-level color picker. The value must be a 7-digit lowercase hexadecimal color code (such as #4a90e2). It needs to be used together and the value can be obtained in real time through the input event. Modern browsers support it. Older versions of IE will be downgraded to text boxes.
Dec 22, 2025 am 02:34 AM
How to Use the HTML5 picture Element for Responsive Images?
TheHTML5elementenablesresponsiveimagedeliverybasedondevicetraitslikescreensizeorpixeldensitywithoutJavaScript.Ituseselementswithmedia,srcset,ortypeattributesinorder,fallingbacktoarequiredwithalt,width,andheight.
Dec 22, 2025 am 02:18 AM
A performance comparison of HTML5 Canvas vs. SVG for data charts.
Canvasexcelsforlargedatasetswithhighperformance,whileSVGsuitssmaller,interactivecharts;2.SVGoffersbetterinteractivity,accessibility,andresolutionindependence;3.Canvasdemandsmorecodebutprovidesfinercontrolandlowermemoryuseperpoint.
Dec 22, 2025 am 12:37 AM
What is SessionStorage in HTML5? (Code Examples)
SessionStorage is a built-in browser API in HTML5. It is used to temporarily store single-page session data. It is only valid while the tab or window is open, and is cleared when it is closed. It is based on origin isolation, only saves strings, requires manual serialization of objects, and does not participate in network requests.
Dec 21, 2025 am 05:50 AM
How to Build a Responsive Layout with HTML5 and CSS3? (Tutorial)
Adopt a mobile-first strategy: design for small screens first, then use CSS3 media queries and HTML5 elastic structures to enhance the large-screen experience; use semantic HTML5 tags, fluid grid layout, touch and accessibility support.
Dec 21, 2025 am 05:48 AM
How to Add a Poster Image to an HTML5 Video? (The poster attribute)
Usetheposterattributeontheelementtodisplayastaticimagebeforeplayback;itacceptsaURLtoanimagefile,matchesthevideo’saspectratio,andimprovesUXwhenoptimizedandtestedacrossdevices.
Dec 21, 2025 am 05:38 AM
How to connect to a server using HTML5 Server-Sent Events (SSE)? (Live Data Example)
HTML5Server-SentEvents(SSE)enableunidirectionalserver-to-clientreal-timeupdatesoverstandardHTTPusingEventSource.Configureclientwitheventlistenersformessage,customevents,anderrors;servermustreturntext/event-streamwithproperheaders,SSE-formattedlinesen
Dec 21, 2025 am 05:36 AM
How to Read Local Files with the HTML5 File API? (JavaScript Example)
Reading local files in the browser requires user interaction to trigger, obtain the File object through FileAPI and load the content with FileReader; supports text, DataURL, ArrayBuffer and other reading methods, and can verify file type and size.
Dec 21, 2025 am 04:41 AM
Implementing a star rating system with HTML5 and CSS.
Use HTML5 and CSS to create a star rating system without JavaScript. 1. Build a structure through radio buttons and labels, hide the radio buttons and show the star with the label. 2. Use direction:rtl to adjust the order so that the high score comes first, and combine the :checked and ~ selectors to achieve style filling when selected. 3. Add the :hover effect to improve the interactive experience, ensure that each label is associated with the corresponding input, and provide aria-label to enhance accessibility. 4. Test keyboard navigation to ensure usability. This solution has clear semantics, beautiful appearance, and is compatible with screen readers. It is suitable for static forms or user evaluation scenarios.
Dec 21, 2025 am 04:28 AM
How to Make a Website Fullscreen with the HTML5 API? (JavaScript Code)
Calling the requestFullscreen() method of an element can make it enter full screen, which requires user gesture triggering and is limited to security context; detect through document.fullscreenElement, exit through document.exitFullscreen(), and use the :fullscreen pseudo-class to adjust the style.
Dec 21, 2025 am 04:14 AM
What are the New Semantic Elements in HTML5? (Full Guide)
HTML5introducedsemanticelementstoimprovestructure,accessibility,andSEO.Sectioningelementsinclude,,,,and;content-specificonesare,,,,and;embeddedelementsinclude,,,and.
Dec 21, 2025 am 01:54 AM
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