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  • What is the purpose of the :is() and :where() pseudo-classes in CSS Selectors?
    What is the purpose of the :is() and :where() pseudo-classes in CSS Selectors?
    :is() and :where() are used to simplify CSS selectors, the difference is that the former affects specificity, while the latter does not. :is() reduces duplicate code by combining multiple selectors, such as ::is(h1,h2,h3,p,li)a:hover matches any link that meets the criteria and adopts the highest internal specificity; while :where() also combines selectors but does not increase specificity, which is suitable for resetting styles or avoiding conflicts, such as ::where(.highlight,.feature) background color setting will not override other rules. Common uses of the two include theme switching, component style grouping and low specific global reset to improve code maintainability and scalability.
    CSS Tutorial . Web Front-end 507 2025-07-03 01:00:22
  • A complete CSS tutorial on styling HTML tables
    A complete CSS tutorial on styling HTML tables
    HowcanHTMLtablesbeeffectivelystyledwithCSS?1.Startbyapplyingbasestyleslikeborder-collapse,padding,andbackgroundcolorstoheadersforacleanlayout.2.Enhancereadabilitywithzebrastripesusing:nth-child(even)andaddhovereffectsforinteractivity.3.Controlborders
    CSS Tutorial . Web Front-end 774 2025-07-03 00:44:20
  • Can you combine the :not() pseudo-class with other CSS Selectors?
    Can you combine the :not() pseudo-class with other CSS Selectors?
    Yes, :not() can be used in conjunction with other CSS selectors. 1. You can combine :not() with the class. For example, a:not(.btn) can select links to non-.btn classes; 2. You can implement multiple exclusion conditions through comma separation, such as input:not([type="text"],[type="email"]) to exclude text and mailbox input boxes; 3. You can combine with pseudo-classes, such as li:not(:first-child) to add styles to all list items except the first one. At the same time, you need to note that their internal selectors affect specificity and cannot be nested.
    CSS Tutorial . Web Front-end 939 2025-07-03 00:39:20
  • How do you use the logical properties and values (e.g., margin-inline-start)?
    How do you use the logical properties and values (e.g., margin-inline-start)?
    Logicalpropertieslikemargin-inline-startshouldbeusedwhendesigninglayoutsthatadapttodifferentwritingsystemsorRTLlanguages.1.Theydefinespacingbasedoncontentflowratherthanfixeddirections.2.margin-inline-startadjustsautomaticallydependingonthetextdirecti
    CSS Tutorial . Web Front-end 457 2025-07-03 00:33:40
  • What are attribute selectors and can you provide an example?
    What are attribute selectors and can you provide an example?
    The CSS attribute selector performs precise style control through the attributes and values ??of elements, and supports multiple matching methods. Its basic syntax is element[attribute="value"], for example: [type="text"] exactly matches attribute values; [href] only judges the existence of attributes; [class~="highlight"] matches specific values ??in the space-separated class name list; [attr|=value] is used to match hyphen-separated values ??(such as language code); [attr^=value], [attr$=value] and [attr*=value] respectively
    CSS Tutorial . Web Front-end 377 2025-07-03 00:32:30
  • The Gap Strikes Back: Now Stylable
    The Gap Strikes Back: Now Stylable
    Styling the space between layout items — the gap — has typically required some clever workarounds. But a new CSS feature changes all that with just a few simple CSS properties that make it easy, yet also flexible, to display styled separators between
    CSS Tutorial . Web Front-end 370 2025-07-02 09:21:15
  • When should you choose Flexbox over CSS Grid for a layout?
    When should you choose Flexbox over CSS Grid for a layout?
    Flexbox should be selected for one-dimensional layout, such as navigation bar, responsive components, and vertical centering; use CSSGrid to handle two-dimensional layouts. 1. Flexbox is suitable for horizontal or vertical arrangement of elements, such as link alignment and spacing control in the navigation bar; 2. When building responsive components (such as buttons and form controls), Flexbox provides more intuitive layout adjustments; 3. Flexbox simplifies the vertical centering problem, which can be achieved through align-items and justify-content. For complex layouts that require both rows and columns to be managed simultaneously, CSSGrid should be selected.
    CSS Tutorial . Web Front-end 465 2025-07-02 01:21:51
  • What are named grid lines?
    What are named grid lines?
    NamedgridlinesinCSSGridLayoutallowyoutoassigncustomnamestorowandcolumnlines,improvingreadabilityandmaintainability.1.Theyenhanceclaritybyusingmeaningfulnameslike"sidebar-start"insteadofnumbers.2.Theyofferflexibilitybylettingyoudefinemultipl
    CSS Tutorial . Web Front-end 594 2025-07-02 01:19:40
  • How to create an intrinsically responsive grid layout?
    How to create an intrinsically responsive grid layout?
    To create an intrinsic responsive grid layout, the core method is to use CSSGrid's repeat(auto-fit,minmax()) mode; 1. Set grid-template-columns:repeat(auto-fit,minmax(200px,1fr)) to let the browser automatically adjust the number of columns and limit the minimum and maximum widths of each column; 2. Use gap to control grid spacing; 3. The container should be set to relative units such as width:100%, and use box-sizing:border-box to avoid width calculation errors and center them with margin:auto; 4. Optionally set the row height and content alignment to improve visual consistency, such as row
    CSS Tutorial . Web Front-end 301 2025-07-02 01:19:20
  • What is Autoprefixer and how does it work?
    What is Autoprefixer and how does it work?
    Autoprefixer is a tool that automatically adds vendor prefixes to CSS attributes based on the target browser scope. 1. It solves the problem of manually maintaining prefixes with errors; 2. Work through the PostCSS plug-in form, parse CSS, analyze attributes that need to be prefixed, and generate code according to configuration; 3. The usage steps include installing plug-ins, setting browserslist, and enabling them in the build process; 4. Notes include not manually adding prefixes, keeping configuration updates, prefixes not all attributes, and it is recommended to use them with the preprocessor.
    CSS Tutorial . Web Front-end 244 2025-07-02 01:15:21
  • How do you clear a float?
    How do you clear a float?
    There are two main ways to clear the impact of floating: use the clear attribute or the clearfix technique. 1. When using the clear attribute, set clear:both on the element that needs to be disconnected to make the element appear below the floating element, but additional tags will be introduced; 2. Clearfix tricks to clear the floating hook through pseudo-element::after insertion, no additional DOM nodes are required and highly reusable, suitable for modular development; in addition, modern layouts can consider Flex or Grid to replace float to avoid floating problems.
    CSS Tutorial . Web Front-end 1018 2025-07-02 01:14:51
  • What is feature detection in CSS using @supports?
    What is feature detection in CSS using @supports?
    FeaturedetectioninCSSusing@supportschecksifabrowsersupportsaspecificfeaturebeforeapplyingrelatedstyles.1.ItusesconditionalCSSblocksbasedonproperty-valuepairs,suchas@supports(display:grid).2.Thismethodensuresfuturecompatibilityandavoidsrelianceonunrel
    CSS Tutorial . Web Front-end 811 2025-07-02 01:14:30
  • What is the grid-template-areas property and how do you use it?
    What is the grid-template-areas property and how do you use it?
    The grid-template-areas attribute of CSSGrid defines the layout by naming the area. 1. First define the structure of rows and columns with strings in the container; 2. Then specify the corresponding area name for each grid item; 3. Support responsive design, and the area arrangement method can be redefined in media queries. This method is intuitive and easy to read, making it easy to maintain and adjust the layout.
    CSS Tutorial . Web Front-end 611 2025-07-02 01:14:11
  • CSS tutorial for building a navigation menu from scratch
    CSS tutorial for building a navigation menu from scratch
    To create a CSS navigation menu, first build the structure using HTML's nav elements and an unordered list, then implement horizontal layout through Flexbox, and add hover effects and responsive design. 1. Use semantic HTML structures to include nav, ul, li and a tags; 2. Use Flexbox to set display:flex, gap and list-style:none to achieve horizontal arrangement; 3. Add link styles, hover effects, transition animations and focus states; 4. Use media query to adjust the flex-direction under the small screen to column to achieve vertical stacking layout. The whole process is simple and clear, suitable for mastering basic layout techniques.
    CSS Tutorial . Web Front-end 887 2025-07-02 01:13:51

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