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- What are the different types of CSS Selectors available?
- CSS selectors mainly include basic selectors, combination selectors, attribute selectors, pseudo-classes and pseudo-element selectors. 1. The basic selector includes elements, classes, IDs, and wildcard selectors, which are used for basic style settings. 2. The combination selector contains descendants, child elements, adjacent brothers, and general brother selectors, which are used to handle element structure relationships. 3. The attribute selector matches elements according to the attributes and is suitable for specific elements such as forms and links. 4. Pseudo-class and pseudo-element selector are used to control states and generate content, such as:hover, ::before, ::after, etc., to improve interaction and decorative effects.
- CSS Tutorial . Web Front-end 1004 2025-07-03 01:49:10
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- What is CSS and what does it stand for?
- CSS,orCascadingStyleSheets,isthepartofwebdevelopmentthatcontrolsawebpage’svisualappearance,includingcolors,fonts,spacing,andlayout.Theterm“cascading”referstohowstylesareprioritized;forexample,inlinestylesoverrideexternalstyles,andspecificselectorslik
- CSS Tutorial . Web Front-end 589 2025-07-03 01:48:51
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- How to link CSS to HTML tutorial
- To connect CSS to HTML, 1. Use tags to introduce external CSS files, recommend ways, add code to them and ensure the path is correct; 2. Use tags to write internal CSS, suitable for small projects or tests, and the style is written in the HTML area; 3. Use inline styles to write directly on HTML tags, and it is recommended to use them in special cases; common problems include path errors, spelling errors, loading order and cache issues, and they need to be checked one by one to ensure that the style takes effect.
- CSS Tutorial . Web Front-end 419 2025-07-03 01:48:11
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- BEM methodology for writing scalable CSS tutorial
- BEMisaCSSnamingconventionthatimprovesscalabilityandmaintainabilitybystructuringclassnamesaroundblocks,elements,andmodifiers.1)Blocksarestandalonecomponents.2)Elementsareblock-specificchildren.3)Modifiersindicatevariations.Classnamesfollowthe.block__e
- CSS Tutorial . Web Front-end 669 2025-07-03 01:47:00
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- What is the difference between using opacity: 0 and visibility: hidden?
- When using opacity:0, the elements are transparent but still occupy space, interactable, and support transition animation; when using visibility:hidden, the elements are not visible but still occupy space, but do not respond to interaction, and child elements can override this setting. Neither element is removed from the layout, but the behavior and applicable scenarios are different: 1. opacity:0 maintains functionality and animation capabilities; 2. visibility:hidden blocks interaction and allows child elements to be displayed; 3. Transition animation can be used on opacity, but cannot be used for visibility; 4. Screen readers may still read these two hidden elements, and other methods should be used if they need to be completely hidden.
- CSS Tutorial . Web Front-end 266 2025-07-03 01:44:40
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- How to create a custom timing function with cubic-bezier()?
- To customize the cubic-bezier() timing function of CSS, 1. It is necessary to understand that its structure is cubic-bezier(x1,y1,x2,y2), the starting point (0,0), and the end point (1,1), the x value must be between 0 and 1, and y can exceed to achieve the bounce or fallback effect; 2. Common presets such as ease, ease-in, etc. are the abbreviation of built-in curves, but fine control needs to be defined manually; 3. Select the control point and can be assisted by online tools to observe the velocity changes corresponding to the steepness of the curve. If the Y axis is less than 0, there will be rebound, and the X axis may regress beyond the range; 4. Pay attention to good compatibility when using, the value cannot exceed the range, and the multi-attribute transition should be unified; 5. Sample code. c in transition-box
- CSS Tutorial . Web Front-end 867 2025-07-03 01:42:50
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- How can CSS Custom Properties help with theming a website?
- Use CSS custom properties (CSS variables) to simplify website topic management. First, define theme variables, such as colors and fonts in:root, such as: --primary-color:#007bff; Second, call these variables through var (--variable-name) in the style sheet; Third, dynamically switch themes by changing the class name, such as .theme-dark overwrite variable values; Fourth, use JavaScript to implement user theme selection and store preferences; Fifth, group variables logically to improve maintainability; Sixth, local variables can be defined within specific components to achieve differentiated styles. This method centrally manages theme configurations, supports flexible and efficient style updates and multiple styles
- CSS Tutorial . Web Front-end 976 2025-07-03 01:36:02
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- What is the outline: none controversy and how should you handle focus indicators?
- Focusindicatorsshouldnotberemovedandmustbestyledvisibly.DevelopersoftenuseCSSresetsthatremoveoutlines,butthisharmsaccessibility;instead,customizefocusstyleswithhigh-contrastcolorsandoffsetstoensurevisibility.Keepfocusindicatorsconsistentacrossthesite
- CSS Tutorial . Web Front-end 520 2025-07-03 01:33:40
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- How to align items within a grid cell?
- Set the alignment of items in cells in CSSGrid. You can control the alignment of vertical and horizontal directions through the align-self and justify-self properties respectively; 1. Use align-self (optional values: start, end, center, stretch) for a single project; 2. Use justify-self to set horizontal alignment (also support start, end, center, stretch); 3. When you want to unify all project alignments, use align-items and justify-items in the parent container; FAQs include not enabling Grid layout, unclear cell size, or cross-grid shadowing.
- CSS Tutorial . Web Front-end 411 2025-07-03 01:33:21
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- What is a subgrid and what problem does it solve?
- CSS subgrid (Subgrid) is a feature in the CSSGrid layout module that allows mesh items to inherit the track size (columns and rows) of their parent grid. Mainly solves the problem of maintaining alignment consistency in nested layouts. When using it, you need to set grid-template-columns:subgrid to allow the subgrid to follow the parent structure. Suitable for scenarios such as forms, card components and dashboards. Modern browsers support well, but are not compatible with IE11 and earlier versions. In addition, sub-grids are only suitable for direct child elements, and deep nesting needs to be applied layer by layer.
- CSS Tutorial . Web Front-end 298 2025-07-03 01:32:20
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- How do you keep up-to-date with the latest CSS features and standards?
- TostaycurrentwithCSS,followtrustedblogsandnewsletterslikeCSS-Tricks,MDNWebDocs,andCSSWeeklytolearnaboutnewfeaturesandpracticalusecases.2.Usebrowserdevelopertoolstoinspectmodernwebsitesandexplorereal-worldimplementationsofnewerpropertieslike:has(),cla
- CSS Tutorial . Web Front-end 160 2025-07-03 01:25:50
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- Can you use media queries to check for device orientation (portrait/landscape)?
- Yes, you can use CSS media to query the direction of the device; 1. Use @mediascreenand(orientation:portrait) to detect the vertical screen, which is suitable for adjusting the button size and hiding non-key content; 2. Use @mediascreenand(orientation:landscape) to detect the horizontal screen, which is suitable for displaying horizontal content, changing the layout of the navigation bar, etc.; 3. Note that the orientation reflects the viewport width and height relationship rather than the physical direction, and the behavior of different devices may be inconsistent, so compatibility testing is recommended; 4. You can also use min-aspect-ratio or max-aspect-ratio to determine the actual situation.
- CSS Tutorial . Web Front-end 497 2025-07-03 01:25:30
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- How to use the new :has() relational pseudo-class in CSS Selectors?
- :has() is a new relational pseudo-class added by CSS, allowing the parent element to be selected based on whether the child element exists. The basic usage is parent:has(child){style}, such as p:has(img) will select the paragraph containing the image and apply the style. Practical scenarios include: 1. Automatically adjust the style, such as adding an inner margin to the div containing links; 2. Exact match, such as adding an icon to the paragraph containing external links; 3. Structural style control can be achieved without class or JS. Notes include: 1. Mainstream browsers have supported but Firefox has not been followed up yet; 2. Nested use is not supported: has(:has(...)); 3. The selector should be kept concise to avoid performance problems. Alternatives include adding class manually
- CSS Tutorial . Web Front-end 144 2025-07-03 01:25:00
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- Understanding CSS selectors tutorial
- CSS selector is a key tool for precise control of web elements in front-end development. 1. The basic selector includes element selectors (such as p), class selectors (such as .btn) and ID selectors (such as #header), which are used to match tags, reusable class names and unique IDs, respectively, and the difference is priority and usage scenarios; 2. Combination selectors achieve more precise selection through descendants (such as divp), offspring (such as ul>li), adjacent brothers (such as h1 p) and general brothers (such as h1~p) relationships; 3. Attribute selectors select elements based on attribute values, such as [type="text"], [href] and [class*="col-"]
- CSS Tutorial . Web Front-end 312 2025-07-03 01:22:30
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