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- Use Bootstrap/CSS to solve the problem of Div and horizontal overflow of horizontal tables
- This article discusses how to solve the problem of mismatch in width and inconsistency in height due to overflow of table content when using Bootstrap/CSS layout. Enable horizontal scrolling by introducing a table wrapper and adjusting the inner margins to unify element heights to ensure responsiveness and visual consistency of the page layout.
- HTML Tutorial . Web Front-end 198 2025-09-20 21:09:00
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- Solve the problem of stacking of transform scaling elements covering sticky positioning elements
- When the CSS transform attribute causes elements (such as images) to scale, there may be problems with the scaled element covering sticky navigation or other fixed elements. This paper will elaborate on this phenomenon and provide solutions for how to precisely control the order of element stacking by adjusting the z-index attributes, ensuring that the sticky positioning elements are always at the top of the visual level, thus maintaining the integrity of the page layout and user experience.
- HTML Tutorial . Web Front-end 133 2025-09-20 21:06:02
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- How to select options in the Select box through object values
- This article describes how to use JavaScript to select the corresponding option in the HTML Select box based on the object value. The core idea is to set the value attribute of the Select box option to a JSON string, then serialize the target object into a JSON string through JavaScript, and use the CSS selector to find the Option element with a matching value attribute, and finally set it to the selected state. This article provides detailed code examples and explanations to help developers easily implement this feature.
- HTML Tutorial . Web Front-end 754 2025-09-20 21:03:01
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- Trap analysis of var name and DOM operations in JavaScript
- In the global scope of JavaScript, declaring a variable named name using var can cause unexpected behavior because it conflicts with the browser's predefined window.name global property that only accepts string values. This article will explore the reasons for this phenomenon in depth and show through sample code how to effectively solve this problem by using let/const, selecting different variable names, utilizing module scopes, or executing function expressions immediately (IIFE) and other methods to ensure the correctness of DOM operations.
- HTML Tutorial . Web Front-end 775 2025-09-20 20:57:01
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- Select2 container style customization: add custom CSS class
- This article details how to add a custom CSS class to the container elements generated by Select2 through the containerCssClass configuration option of Select2. This allows developers to easily personalize the overall appearance of the Select2 drop-down menu, enabling more flexible style control to meet specific UI design needs.
- HTML Tutorial . Web Front-end 869 2025-09-20 20:54:02
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- How to force stretch the iframe embedded video to occupy the full width of the browser
- In view of the problem that custom CDN videos cannot be stretched in full screen in iframes, resulting in gray edges, this article will introduce in detail how to correctly set the parent container height (such as body { height: 100vh; }) through CSS properties such as min-width: 100% and correctly set the parent container height (such as body { height: 100vh; }), combined with other responsive design techniques, ensure that the embedded video can force the full width of the browser to achieve a seamless full screen playback experience.
- HTML Tutorial . Web Front-end 798 2025-09-20 20:51:01
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- Bootstrap/CSS layout tutorial: Solve the problem of alignment of navigation and table width and height
- This tutorial is intended to solve the common problem of the misalignment of navigation areas with tables in Bootstrap projects, especially when the table contents overflow due to text-nowrap. The article will introduce in detail how to achieve width alignment by introducing responsive wrappers and achieve high synchronization by adjusting CSS properties, helping developers build a web interface with clear structure and consistent layout.
- HTML Tutorial . Web Front-end 952 2025-09-20 20:48:01
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- JavaScript dynamically modify multi-element styles: avoid ID duplication and optimize event processing
- This article explores in-depth pitfalls and best practices when dynamically modifying multiple HTML elements using JavaScript. The principle of uniqueness of ID is emphasized, and a tutorial on efficient and reliable implementation of multi-element style switching through class selectors, getElementsByClassName and addEventListener is provided, emphasizing the advantages of using CSS classes for style management.
- HTML Tutorial . Web Front-end 112 2025-09-20 20:45:00
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- Client aggregation scheme in Spring Boot that handles dynamic multi-select drop-down list value submission
- This tutorial introduces a client aggregation scheme that handles multiple dynamic drop-down list value submissions in a Spring Boot project. By leveraging JavaScript's onchange event, the values ??selected by the user in different drop-down lists are collected in real time and spliced ??into a string with specific delimiters, stored in a hidden input field. Finally, the value of the hidden field is submitted to the backend controller along with the form and parsed by the backend, thereby efficiently passing and processing user selection data from multiple dynamic drop-down lists.
- HTML Tutorial . Web Front-end 712 2025-09-20 20:42:01
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- How to select HTML Select option based on object value in JavaScript
- This article explains in detail how to dynamically select the corresponding options in an HTML element based on a JavaScript object. The core method is to serialize the target JavaScript object into a JSON string, then use the CSS attribute selector to accurately match the element's value attribute, and finally set the selected state through the DOM operation. The article provides complete code examples and important considerations to ensure the robustness and accuracy of the implementation process.
- HTML Tutorial . Web Front-end 119 2025-09-20 20:39:01
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- CSS tips: Use pseudo-elements to solve the problem of premature hiding of hover tooltips
- This article discusses the problem of tooltips prematurely hiding when implementing HTML tooltips using CSS. By introducing pseudo-elements and cleverly utilizing their padding properties, the hover area can be effectively expanded, thereby improving the user experience and allowing the user to have enough time to move the mouse into the prompt box to avoid its unexpected disappearance.
- HTML Tutorial . Web Front-end 565 2025-09-20 20:36:01
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- Bootstrap responsive column spacing management: using Gutter tool class to achieve no inner margin on mobile terminal
- This article explores how to implement responsive horizontal spacing control of columns in Bootstrap through the built-in Gutter tool class instead of the traditional px-* margin class. In view of the mobile phone's need to remove column margins, we found that px-0 may not achieve the expected results with px-lg-*. The tutorial will provide detailed description of how to use gx-0 to remove column spacing on small screens, and combine gx-lg-* to restore or set appropriate spacing on larger screens, thereby avoiding custom CSS and optimizing layout performance.
- HTML Tutorial . Web Front-end 865 2025-09-20 20:33:01
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- Selenium Python: Tutorial on correctly using variables to locate elements in XPath
- This article aims to solve common problems encountered when building XPath expressions using variables in Selenium Python automation testing. The core content is to explain why referencing Python variables directly in XPath strings will cause failures, and provides a solution to correctly embed variable values ??into XPath expressions through string stitching or f-string (Python 3.6), ensuring that elements can be accurately found and manipulated.
- HTML Tutorial . Web Front-end 689 2025-09-20 20:30:01
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- CSS picture vertical centering problem: Flexbox solution
- This article explores the common reasons why vertical-align: middle fails in vertical centering scenes, and provides a modern and efficient CSS solution - Flexbox. By applying display: flex and align-items: center on the parent container, it can easily achieve accurate centering alignment of images in vertical direction, effectively solving common layout problems in front-end development.
- HTML Tutorial . Web Front-end 287 2025-09-20 20:27:01
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