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- What is the purpose of the HTML id attribute
- ThepurposeoftheHTMLidattributeistouniquelyidentifyanelementonawebpage.1.Eachidmustbeuniqueandidentifiesasingleelement,suchas.2.InCSS,the#selectorstylestheelementwiththatid,like#intro{color:blue;},thoughusingclassispreferredforbetterreusability.3.InJa
- HTML Tutorial . Web Front-end 364 2025-08-25 02:14:21
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- Understanding the base tag in HTML
- ThetagsetsadefaultURLandtargetforallrelativelinksinawebpage,affectinghowbrowsersresolveresources.1.Itmustbeplacedinthesectionandonlythefirstinstanceisused.2.ItappliestorelativeURLsin,,,andelements,leavingabsoluteURLsunchanged.3.Itcanstandardizeassetp
- HTML Tutorial . Web Front-end 846 2025-08-25 00:58:21
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- How to create a clickable image map in HTML
- Usethetagwithausemapattributetoreferenceanamedmap.2.Definethemapusingtheelementwithanameattributematchingtheusemapvalue.3.Insidethemap,addelementsspecifyingshape,coordinates,href,andalttextforeachclickableregion.Coordinatesmustbeprecisebasedonpixeldi
- HTML Tutorial . Web Front-end 468 2025-08-25 00:49:21
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- How to create a star rating system with HTML and CSS
- Create a star rating system without JavaScript, using HTML's radio buttons and CSS; 2. Each star in HTML consists of a radio input box and label, and is associated with the for attribute, click the label to select the corresponding score; 3. Hide the radio button in CSS, and use flex-direction:row-reverse and ~ selector to achieve the highlighting effect when hovering and selecting; 4. Make the selected and previous stars appear golden through the:hover and:checked states; 5. Enhance accessibility, support keyboard navigation and screen readers, and add aria-label or explanatory text; 6. Optional FontAw
- HTML Tutorial . Web Front-end 294 2025-08-25 00:14:20
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- Best practices for passing dynamic data from HTML/JavaScript in Flask apps
- This article aims to solve the common problem of how front-end HTML/JavaScript passes dynamic variables to the back-end in Flask applications. By deeply analyzing the execution timing differences between Jinja template engine and JavaScript, we will introduce an effective method to combine Jinja to generate basic URLs and JavaScript to splice dynamic parameters, and provide complete code examples and precautions to ensure the accuracy and security of data transmission.
- HTML Tutorial . Web Front-end 657 2025-08-25 00:00:02
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- Pass variable data in HTML to Flask
- This article describes how to pass JavaScript variable data from HTML pages to the Flask backend. By combining Jinja templates and JavaScript, URLs can be built dynamically, so that variable data can be passed to Flask routes as parameters. The article provides detailed code examples and explanations to help developers understand and implement this feature.
- HTML Tutorial . Web Front-end 359 2025-08-24 23:51:01
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- Safely pass variable data from HTML JavaScript in Flask app
- This article aims to solve the problem of passing variable data from JavaScript code of HTML pages to the backend route in Flask applications. The core is to understand the scope differences between Jinja templates (server-side rendering) and JavaScript (client execution). The tutorial will explain in detail why using JavaScript variables directly in Jinja fails, and provides an effective way to combine Jinja to generate basic URLs and JavaScript dynamic splicing variables to ensure that the data can be correctly passed to the Flask backend.
- HTML Tutorial . Web Front-end 178 2025-08-24 23:36:00
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- Professional guide to implementing online/offline status detection and UI updates in JavaScript
- This article details how to use JavaScript to accurately detect users' online/offline status and synchronize the user interface. The tutorial corrects common problems such as misuse of event listeners, element selection errors, and improper CSS class operations. It is recommended to use window.addEventListener('online') and window.addEventListener('offline') events, combine navigator.onLine for initial state judgment, and implement flexible and robust UI state management through HTML dataset attributes and CSS attribute selectors, providing complete code examples and best practices.
- HTML Tutorial . Web Front-end 1020 2025-08-24 23:30:00
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- Using JavaScript to detect users' online/offline status: a practical guide
- This document is intended to help developers solve problems when using JavaScript to detect users' online/offline status. We will dive into how to properly listen for online and offline events and provide code examples that demonstrate how to dynamically update user status indicators using JavaScript and CSS to build more responsive and user-friendly web applications.
- HTML Tutorial . Web Front-end 439 2025-08-24 23:09:01
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- JavaScript and Vue: Solve errors in copying text to clipboard
- This article aims to resolve the "TypeError: Cannot read properties of undefined (reading 'writeText')" error that may be encountered when copying text to the clipboard through the navigator.clipboard.writeText() method when using JavaScript and Vue.js frameworks. The article will provide a more compatible alternative, using document.execCommand('copy') to implement text copying functions, and comes with detailed code examples and notes to help developers to install
- HTML Tutorial . Web Front-end 1031 2025-08-24 23:03:01
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- Detecting online/offline status using JavaScript: A practical tutorial
- This article aims to solve problems encountered when using JavaScript to detect users' online/offline status. By analyzing common errors and providing improved code examples, explain in detail how to correctly listen for online and offline events, and dynamically update the display of user status using HTML attributes and CSS selectors. Help developers build more robust network state-aware applications.
- HTML Tutorial . Web Front-end 442 2025-08-24 23:00:01
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- Copy text to the clipboard safely and reliably in Vue apps: Solve compatibility and permission issues
- This article explores the compatibility or security limitations that the navigator.clipboard.writeText method may encounter when copying text to the clipboard in JavaScript and Vue applications. To address this challenge, the tutorial provides a robust alternative: dynamically create and manipulate an invisible text copying feature in combination with document.execCommand('copy') to ensure smooth user experience.
- HTML Tutorial . Web Front-end 538 2025-08-24 22:57:01
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- Use JavaScript to detect user online/offline status
- This article aims to help developers solve problems when using JavaScript to detect users' online/offline status. We will dive into how to leverage the navigator.onLine property and online/offline events, and provide code examples showing how to correctly implement state detection and how to dynamically update user status icons through CSS styles. Through this article, you will be able to build a reliable online/offline status detection mechanism to improve the user experience.
- HTML Tutorial . Web Front-end 489 2025-08-24 22:51:00
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- IIS realizes the file download function of URL parameter values
- This article describes how to receive parameter values ??in URLs through IIS servers and provide them as files to download. The focus is on explaining two methods of using Session to pass data and directly obtaining parameters from URLs, and provides detailed code examples to help developers quickly implement this function. Avoid the problem of URL parameter length limitation and ensure that long strings can be passed smoothly.
- HTML Tutorial . Web Front-end 172 2025-08-24 22:30:01
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