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  • What does the overflow property control?
    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
  • What is the clamp() function and how is it useful for responsive design?
    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 518 2025-07-01 00:50:50
  • Can you apply a transition to multiple properties at once?
    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
  • What is the specificity of a pseudo-class compared to a class?
    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
  • Why should you avoid using @import in your CSS files?
    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 508 2025-07-01 00:39:31
  • What is Flexbox and what problem does it solve?
    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 239 2025-07-01 00:29:01
  • How does font-variant-numeric work for styling numbers?
    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 148 2025-07-01 00:28:41
  • How can you make your CSS more accessible?
    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
  • What is the difference between the main axis and the cross axis in Flexbox?
    What is the difference between the main axis and the cross axis in Flexbox?
    ThemainaxisinFlexboxisdeterminedbytheflex-directionproperty,runninghorizontallywithrowandverticallywithcolumn,whilethecrossaxisisalwaysperpendiculartoit.Themainaxisisthedirectioninwhichflexitemsarelaidout,setusingflex-direction:row(horizontal)orflex-
    CSS Tutorial . Web Front-end 182 2025-07-01 00:21:51
  • What is the new :has() relational pseudo-class?
    What is the new :has() relational pseudo-class?
    The:has()pseudo-classinCSSallowsyoutoselectelementsbasedontheirchildordescendantelements.1.Itenablesconditionalstyling,suchasselectingalinkthatcontainsanimage.2.Thesyntaxisselector:has(selector-or-combinator),forexamplea:has(img).3.Itchecksforanymatc
    CSS Tutorial . Web Front-end 739 2025-07-01 00:02:01
  • How to select all anchor tags that open in a new tab using attribute CSS Selectors for target='_blank'?
    How to select all anchor tags that open in a new tab using attribute CSS Selectors for target='_blank'?
    To select all tags that open in a new tab page, use the a[target="_blank"] attribute selector, which is direct and effective. Through this selector, you can add styles such as colors, icons, etc. to it, for example: a[target="_blank"]{color:red;padding-right:20px;background:url('external-icon.png')no-repeatrightcenter;}. If no effect is seen, check 1. Whether the CSS priority is sufficient; 2. Whether the HTML structure is correct; 3. Whether there is a caching problem.
    CSS Tutorial . Web Front-end 270 2025-06-30 01:20:41
  • What are the pros and cons of utility-first CSS frameworks like Tailwind CSS?
    What are the pros and cons of utility-first CSS frameworks like Tailwind CSS?
    Choosing whether to use a practically preferred CSS framework such as TailwindCSS depends on project requirements and team configuration. On the one hand, this type of framework accelerates the development of common UI components by providing low-level classes (such as flex, p-4, text-lg), avoids naming conflicts and improves consistency, and is especially suitable for teams composed of non-CSS experts; on the other hand, for projects with unique visual brands or large number of customized designs, reusing long list of practical classes may lead to code redundancy, HTML bloat and maintenance difficulties; in addition, tools such as Tailwind require time to configure and have a certain learning curve for developers who are not familiar with the system, but the problem can be alleviated through editor plug-ins, preset configurations and unified naming specifications. Therefore, if the team can take it
    CSS Tutorial . Web Front-end 641 2025-06-30 01:18:11
  • How does the order property in Flexbox work?
    How does the order property in Flexbox work?
    TheorderpropertyinFlexboxcontrolsthevisualorderofflexitemsindependentlyoftheirHTMLsourceorderbyassigningnumericalvalues,wherelowernumbersappearfirst.1.Bydefault,allitemshaveorder:0.2.Itemsaresortedvisuallybasedonascendingnumericalvalues.3.Itemswithth
    CSS Tutorial . Web Front-end 204 2025-06-30 01:15:41
  • CSS tutorial explaining the z-index property
    CSS tutorial explaining the z-index property
    Tocontrolwhichoverlappingwebpageelementappearsontop,usetheCSSz-indexpropertywithpositionedelements.Thez-indexassignsastackingorderwherehighervaluesappearabovelowerones,butonlyworksonelementswithpositionsettorelative,absolute,fixed,orsticky.Stackingco
    CSS Tutorial . Web Front-end 585 2025-06-30 01:15:01

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