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- What are the four main transition properties (property, duration, timing-function, delay)?
- The four main properties of CSS transition include transition-property, duration, timing-function and delay. ① Transition-property specifies the CSS attribute to be animate, such as width or background-color, and the unlisted properties will not transition smoothly; ②duration defines the animation duration, in seconds or milliseconds, and the default is 0s, that is, there is no animation; ③timing-function controls the animation speed curve, such as ease, linear or custom cubic-bezier; ④ delay sets the waiting time before the animation starts, and is used to synchronize multiple
- CSS Tutorial . Web Front-end 776 2025-07-01 01:10:30
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- Advanced CSS tutorial for modern web design
- The key to mastering modern CSS design is layout, responsiveness, and maintainability. 1. Use CSSGrid and Flexbox to combine layout. Grid is suitable for two-dimensional structures such as the entire page, and Flexbox is suitable for one-dimensional arrangements such as button groups; 2. Use CSS variables to achieve theme switching, define color variables and dynamic switching with JavaScript; 3. Mobile priority and handle responsive details, adopt relative units, picture srcset attributes and centralized media queries; 4. Improve maintainability, use BEM and other naming specifications, split modules, control nesting levels, and separate components and layout styles. These combinations of techniques can significantly improve code quality.
- CSS Tutorial . Web Front-end 930 2025-07-01 01:08:20
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- How can I style form inputs based on their state, like :checked or :invalid, using CSS Selectors?
- To style the different states of form input (such as selected, invalid or focused), the CSS pseudo-class should be used. 1. Use the checked pseudo-class to set styles for selected check boxes or radio buttons; 2. Use the:invalid pseudo-class to set styles for fields that have not passed the verification, combined with: user-invalid can be applied after user interaction; 3. Use the:focus and:hover pseudo-classes to enhance availability and accessibility; 4. Multiple pseudo-classes can be combined to implement multi-state style design, such as matching invalid and focused states at the same time. These methods can achieve dynamic style changes without JavaScript.
- CSS Tutorial . Web Front-end 798 2025-07-01 01:07:21
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- How to use the ::selection pseudo-element to style selected text?
- Tocustomizeselectedtextappearanceonawebpage,usethe::selectionpseudo-element.Itallowsstylingofhighlightedtextwithpropertieslikecolorandbackground.Forexample,::selection{background-color:#ff9900;color:#fff;}changesselectedtexttoorangewithwhitetext.Youc
- CSS Tutorial . Web Front-end 566 2025-07-01 01:04:10
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- How would you debug a CSS layout issue?
- TodebugCSSlayoutissues,systematicallyinspectelements,understandlayoutmodels,andcheckforhiddeninfluences.First,useBrowserDevToolstoinspectelements,viewappliedstyles,identifyoverriddenrules,andtestlivechanges.Second,understandhowlayoutmethodslikeflexbo
- CSS Tutorial . Web Front-end 706 2025-07-01 01:02:10
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- Project-based CSS tutorial to build a portfolio
- To build a portfolio website using HTML and CSS, first plan a clear layout structure, then use mobile-first CSS for style design, then highlight project display, and finally add details to improve the overall experience. The specific steps include: 1. Use semantic HTML tags to build a basic structure containing headers, related, projects and contact parts; 2. Realize responsive design through flexbox or grid layout, media query and interactive effects; 3. Display projects in the form of cards and add animation effects; 4. Select color schemes, readable fonts, optimize links and SEO, and test website performance on different devices.
- CSS Tutorial . Web Front-end 538 2025-07-01 01:00:22
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- What does the overflow property control?
- The overflow property of CSS is used to control how the container content is displayed when overflowing. Its core answer and detailed description are as follows: 1. overflow:visible (default) allows content to overflow the container and remain visible, suitable for situations where no content wants to be hidden or cropped; 2. overflow:hidden hides content beyond the boundary of the container, suitable for maintaining visually closed areas; 3. overflow:scroll always adds scroll bars, regardless of whether the content overflows, suitable for areas where scrolling behavior is required; 4. overflow:auto only displays scroll bars when the content actually overflows, suitable for content with dynamic or uncertain size; 5. Other values ??such as overflow
- CSS Tutorial . Web Front-end 717 2025-07-01 00:51:50
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- What is the clamp() function and how is it useful for responsive design?
- CSS' clamp() function realizes dynamic adjustment in responsive design by setting the minimum, preferred values ??and maximum values. It allows properties such as font size, spacing, etc. to smoothly adapt to different screen sizes. For example: font-size: clamp(1rem, 2.5vw, 2rem) means that the font is not less than 1rem on the small screen and not more than 2rem on the large screen, and 2.5vw is preferred for scaling. In addition, clamp() can also be used to control numerical properties such as inner margins and widths, such as padding: clamp(16px, 5%, 32px) to ensure that the inner margins maintain a reasonable range on different devices. Its browser support is good and is suitable for modern mainstream browsers. It is recommended to use it with relative units and
- CSS Tutorial . Web Front-end 519 2025-07-01 00:50:50
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- Can you apply a transition to multiple properties at once?
- The key to using one line of code to transition multiple attributes is to correctly use the abbreviation of transition attributes and pay attention to performance and compatibility. The specific methods are: 1. Use the all keyword to set the transition of all attributes uniformly, such as transition: all0.3sease; 2. Clearly list multiple attributes that need to be transitioned and set parameters separately, such as transition: background-color0.3sease, border-radius0.3sease; 3. Common application scenarios include button hovering effect, menu expansion/collapse and responsive layout switching; 4. Pay attention to avoid unnecessary attributes for transition, consider browser compatibility, and identifying them that cannot be passed.
- CSS Tutorial . Web Front-end 892 2025-07-01 00:48:11
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- What is the specificity of a pseudo-class compared to a class?
- The specific weights of pseudo-classes and classes are the same. In CSS, pseudo-classes (such as: hover) and regular classes (such as.btn) are at the same specificity level, and are both third-class selectors, and each item contributes a class-level specificity score. For example, the specificity of .btn and a:hover are both 0, 0, 1, 0; while the ID selector (#nav) adds higher weights. Although pseudo-classes do not increase specificity values ??themselves, their application states (such as hovering or focusing) may make them effective in cascades. In actual use, pseudo-classes and classes should be reasonably matched to control style priorities and avoid over-dependence on pseudo-classes to make critical UI changes.
- CSS Tutorial . Web Front-end 624 2025-07-01 00:40:01
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- Why should you avoid using @import in your CSS files?
- Use @import in CSS files should be avoided as it will reduce website loading and increase maintenance difficulty. 1. It prevents parallel downloads, and the browser must first load the main stylesheet before it can start downloading the imported stylesheet, thereby extending the critical rendering path; 2. Maintenance and debugging difficulties, and nested imports make the style source difficult to trace; 3. Better alternatives include using tags, merging CSS during construction, and using the modular functions of the CSS preprocessor; 4. Although it is still available in specific scenarios such as printing styles that are conditionally loaded, it should be used with caution in most cases.
- CSS Tutorial . Web Front-end 510 2025-07-01 00:39:31
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- What is Flexbox and what problem does it solve?
- Flexbox solves the complex and difficult-to-maintain traditional layout methods by providing easy ways to align, space allocation, and element sorting. It makes vertical centering, contour columns and spacing management simple, and uses properties such as align-items, justify-content, flex-grow and order to achieve flexible one-dimensional layout, suitable for navigation bars, card layouts and UI component construction.
- CSS Tutorial . Web Front-end 240 2025-07-01 00:29:01
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- How does font-variant-numeric work for styling numbers?
- Thefont-variant-numericCSSpropertycontrolsthedisplayofnumbersusingalternateformssupportedbythefont.1.Itenablesstylisticvariationssuchasold-styleorliningnumerals,proportionalortabularspacing,fractions,ordinals,andslashedzeros.2.Valueslikeoldstyle-nums
- CSS Tutorial . Web Front-end 149 2025-07-01 00:28:41
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- How can you make your CSS more accessible?
- To improve CSS accessibility, four core points must be followed: First, ensure that the contrast between text and background meets the standards, at least 4.5:1 for ordinary text, at least 3:1 for large characters, and avoid transmitting information only with colors; Second, retain or optimize the focus indicators of keyboard navigation, such as using: focus-visible to enhance visibility; Third, respect users' preferences for animation and transparency through prefers-reduced-motion media query; Fourth, keep layout changes predictable, reasonably control content display and hiding, and prevent interference with auxiliary technology. These practices can significantly enhance website inclusion.
- CSS Tutorial . Web Front-end 573 2025-07-01 00:24:21
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