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- Modify pseudo-element style using CSS class: Dynamically change ::before element
- This article aims to explain how to dynamically change the style of the ::before pseudo-element of an element by adding or modifying a CSS class. Through a reasonable CSS structure and selector, we can implement flexible style control, avoid writing CSS code separately for each button, thereby improving the maintainability and reusability of the code.
- HTML Tutorial . Web Front-end 842 2025-09-16 20:42:01
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- Implementation techniques and common pitfalls of CSS border transition animation
- A common misunderstanding when adding smooth transition animations to borders in CSS is that the initial border state is not set. The browser requires a clear starting color or style to perform interpolation animation. This article will explain in detail why adding border and transition directly in the hover state cannot take effect, and provides a solution to use transparent as the initial border color, ensuring smooth implementation of border animations, and discussing related best practices.
- HTML Tutorial . Web Front-end 744 2025-09-16 20:39:01
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- Flexbox layout practice in React component: Solve the problem of vertical stacking of mapped list items
- This article aims to solve a common problem in React applications: When rendering list items using map methods, elements are accidentally stacked vertically instead of horizontally as expected. The core solution is to correctly understand and apply the CSS Flexbox layout, ensuring that the display: flex attribute acts on the common parent container of all elements to be arranged, rather than each independent child element. By adjusting the DOM structure and CSS rules, the horizontal layout of elements can be easily implemented and supports multi-line wrapping.
- HTML Tutorial . Web Front-end 772 2025-09-16 20:30:01
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- Optimize front-end theme switching: say goodbye to redundant JavaScript and embrace CSS cascade
- This article discusses the problem of querySelector failure in multi-page scenarios in front-end theme switching, and points out the inefficiency of switching theme class names by element-by-element in JavaScript. The core content is the recommended solution to use CSS cascading style sheets combined with top-level elements (such as body) class name switching to achieve more efficient, easier to maintain, and more robust theme switching functions, thereby avoiding redundant DOM operations and searching for page-specific elements.
- HTML Tutorial . Web Front-end 684 2025-09-16 20:27:01
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- Use CSS classes to control pseudo-element styles
- This article aims to explain how to dynamically change the style of an element's ::before pseudo-element by adding a CSS class. The focus is to utilize the cascading characteristics and selectors of CSS to achieve more flexible style control and avoid directly modifying basic styles, so as to facilitate reuse and customization of styles in different scenarios. Through this article, you will learn how to effectively use CSS classes to control pseudo-elements and improve the maintainability and scalability of your CSS code.
- HTML Tutorial . Web Front-end 945 2025-09-16 20:21:00
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- Solve the problem of long text overflow in Div: scrollbar solution
- This article aims to provide a simple and effective solution for handling long text overflows within a Div container without changing the overall size or page layout of the Div. By applying the overflow-y: scroll property of CSS, vertical scroll bars can be added inside the Div, allowing users to scroll through text content beyond the container scope. This article will introduce in detail how to use this attribute and provide sample code to help developers quickly solve the problem of long text display.
- HTML Tutorial . Web Front-end 345 2025-09-16 20:18:01
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- How to properly configure Javalin to render Pebble templates
- This article provides detailed instructions on how to properly configure and use the Pebble template engine in Javalin applications. The core points include: placing the template file in the src/main/resources instead of the static file directory, using .peb as the template file suffix to ensure that Javalin correctly recognizes the Pebble engine, and rendering the page by routing the path instead of directly redirecting to the template file. At the same time, the article also provides best practices for static file configuration to ensure that the application structure is clear and maintainable.
- HTML Tutorial . Web Front-end 355 2025-09-16 20:12:02
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- JavaScript: Practical Tips to Prevent Keyboard Automatic Hiding on Mobile Devices
- This article discusses how to effectively prevent the virtual keyboard from automatically hiding when the user interacts with the UI button in mobile web applications. The core solution is to re-set the focus back to the text input area in the button click event through JavaScript, thereby maintaining the continuous visibility of the keyboard and improving the smoothness of users' operation in scenarios such as rich text editors.
- HTML Tutorial . Web Front-end 568 2025-09-16 20:09:00
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- Professional Guide to Correctly Configuring Pebble Template Rendering in Javalin
- This tutorial explains the best practices for configuring Pebble template rendering in Javalin applications. The core content includes: placing the Pebble template file in the correct location (src/main/resources instead of static file directories), using .peb as the template file extension to ensure Javalin correctly recognizes the Pebble engine, and rendering the page through appropriate routing redirection and template rendering methods (ctx.render()) instead of redirecting directly to the template file. At the same time, the article also provides optimization suggestions for static file configuration to ensure that the application structure is more professional and easier to deploy.
- HTML Tutorial . Web Front-end 833 2025-09-16 20:03:01
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- Solve the problem of long text overflow in Div: scrollbar solution
- This article aims to provide a solution to deal with long text overflow without changing the size of the Div element. By using the overflow-y: scroll property of CSS, vertical scroll bars can be added inside the Div, allowing users to scroll through text content beyond the container scope, thereby maintaining the stability and aesthetics of the overall layout of the page.
- HTML Tutorial . Web Front-end 369 2025-09-16 19:54:01
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- Modify pseudo-element styles using CSS class
- This article aims to explain how to dynamically modify the style of pseudo-elements (such as ::before) of an element by adding a CSS class. Through reasonable CSS structure design, we can avoid directly modifying the basic style, but instead customize the style by adding additional classes, thereby improving the maintainability and flexibility of the code. The article will provide detailed code examples and explain key points to help readers understand and master this technique.
- HTML Tutorial . Web Front-end 875 2025-09-16 19:51:02
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- Optimize the switching between light and dark mode of web pages: Cleverly use CSS to inherit and simplify theme management
- This article aims to solve the common efficiency problems in web theme switching (such as light and dark mode), especially when developers try to manipulate large numbers of element class names one by one through JavaScript. We will explore a more optimized approach, which is to switch topic class names only on parent elements (such as body) and use CSS's inheritance and selector mechanisms to uniformly manage the style of child elements, thereby simplifying code, improving performance and maintainability.
- HTML Tutorial . Web Front-end 551 2025-09-16 19:42:01
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- Extract href attribute value from XPath path using LXML
- This tutorial details how to use Python's LXML library to extract the href attribute value of a tag from an HTML document, rather than its text content. By modifying the XPath expression, changing the target from element text to a specific property, you can efficiently get the link you want. The article provides complete code examples and key considerations to help you master the application of LXML in web data crawling.
- HTML Tutorial . Web Front-end 845 2025-09-16 19:39:01
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- CSS Border Transition Animation Implementation Guide: Solve the problem of Hover effect not taking effect
- This tutorial explains in detail how to add smooth transition animations to element borders in CSS, especially for common problems where hover effects don't take effect. The core solution is to set a clear initial state for the border, even transparent border, to ensure that the browser can recognize and perform animation effects from the initial state to the target state. Through sample code and professional explanation, the article helps developers master the correct implementation method of border transition animation.
- HTML Tutorial . Web Front-end 816 2025-09-16 19:36:00
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