国产av日韩一区二区三区精品,成人性爱视频在线观看,国产,欧美,日韩,一区,www.成色av久久成人,2222eeee成人天堂

current location：Home > Technical Articles > Daily Programming > CSS Knowledge

  • How does the auto-fit vs auto-fill keyword work in repeat()?
    How does the auto-fit vs auto-fill keyword work in repeat()?
    Thedifferencebetweenauto-fitandauto-fillinCSSGridisthatauto-fillcreatesasmanytracksaspossiblewithoutresizingthem,leavingextraspace,whileauto-fitresizesthetrackstofilltheavailablespace.1.auto-fillmaintainsconsistenttracksizesandleaveswhitespaceifneede
    CSS Tutorial . Web Front-end 854 2025-06-27 01:42:30
  • What are the :focus and :focus-within pseudo-classes?
    What are the :focus and :focus-within pseudo-classes?
    :focus is used to directly focus the element itself, and :focus-within is used to affect the parent container when the child element gets focus. 1.: focus only takes effect on the current element and is often used for input box highlighting; 2.: focus-within is applied to containers containing interactive elements, and when their child elements are focused, triggering style changes, such as the overall highlighting of form groups or search box; 3. When using it, you should ensure accessibility, retain clear focus indicators, and combine them with keyboard navigation tests. Together, the two improve the usability and user experience of the interface.
    CSS Tutorial . Web Front-end 348 2025-06-27 01:40:21
  • When should you use JavaScript animations over CSS animations?
    When should you use JavaScript animations over CSS animations?
    JavaScript is a better choice. Situations where complex logic or interaction is required, such as condition-based animation chains, user input responses (drag and scroll effects); when state management is used for JavaScript, it facilitates animation and state synchronization; and when animation playback and time is required, such as pause, reversal, positioning, etc. through WebAnimationsAPI. In these three types of scenarios, JavaScript animation is better than CSS animation.
    CSS Tutorial . Web Front-end 417 2025-06-27 01:38:40
  • How do the adjacent and general ~ sibling combinators work in CSS Selectors?
    How do the adjacent and general ~ sibling combinators work in CSS Selectors?
    In the CSS selector, it is the adjacent sibling selector, and only the B element immediately after element A is selected; ~ is a general sibling selector, and all B elements of the same level are selected after element A are selected. For example, h2 p{color:red;} only the first paragraph turns red; while h2~p{font-weight:bold;} makes all subsequent paragraphs bold. Both require elements to be at the same level, and only the subsequent brothers can be selected and cannot be reversed. When using it, you need to pay attention to the structure order and nesting issues.
    CSS Tutorial . Web Front-end 340 2025-06-27 01:35:01
  • How do you select elements that have no children or text using the :empty pseudo-class in CSS Selectors?
    How do you select elements that have no children or text using the :empty pseudo-class in CSS Selectors?
    The:emptypseudo-classinCSSselectselementsthathavenochildrenortextcontent,butithasspecificcriteriaandlimitations.Touseit,apply:emptydirectlytotheselector,suchasdiv:empty,whichhidestrulyemptyelements;however,evenwhitespaceorcommentsinsideanelementmakei
    CSS Tutorial . Web Front-end 769 2025-06-27 01:34:20
  • What is CSS-in-JS and what are its pros and cons?
    What is CSS-in-JS and what are its pros and cons?
    CSS-in-JS is a method of directly managing component styles through JavaScript. Its core advantages include 1. Scope styles avoid conflicts, 2. Dynamic styles are more flexible, and 3. Rich tool support. It improves maintainability by binding styles to components, and achieves efficient development with libraries such as styled-components, emotion, etc., but it also has disadvantages such as runtime performance overhead and increased build time. It is suitable for project scenarios that require highly dynamic or componentization.
    CSS Tutorial . Web Front-end 457 2025-06-27 01:26:31
  • What is margin collapsing and how does it happen?
    What is margin collapsing and how does it happen?
    Margin folding in CSS refers to the phenomenon that the vertical margins of adjacent elements are merged into one margin, which mainly occurs in three situations: 1. Between the parent element and the first or last child element; 2. Between the adjacent brother elements; 3. Between the upper and lower margins of empty elements. For example, the upper and lower margins of two consecutive paragraphs will be combined into the larger value instead of adding them; when the parent element has no border or inner margin, the outer margin of the child element will affect the parent element's position; you can prevent collapse by adding inner margins, borders, or setting overflow attributes. Margin folding only occurs in the vertical direction, does not occur in the horizontal direction, and does not occur in the case of using flex, grid layout, or in the presence of floating or absolute positioning.
    CSS Tutorial . Web Front-end 236 2025-06-27 01:18:41
  • How do you make grid items span multiple columns or rows?
    How do you make grid items span multiple columns or rows?
    In CSSGrid, to make grid items span multiple columns or rows, you need to use grid-column and grid-row attributes. 1. Use grid-column to define the column span, such as grid-column:2/4 means starting from the second column line and span to the fourth column line, or use the span keyword such as grid-column:2/span2 means span 2 columns from the second column line; 2. Use grid-row to define the row span, such as grid-row:1/span2 means span 2 rows from the first row line, or can also be written as grid-row:1/3; 3. Set grid-column and grid-row at the same time to achieve a two-dimensional span, such as grid-
    CSS Tutorial . Web Front-end 778 2025-06-27 01:14:00
  • Where can I find a complete CSS Selectors cheat sheet?
    Where can I find a complete CSS Selectors cheat sheet?
    ThebestCSSselectorcheatsheetsarefoundonlineorasdownloadablePDFs.1.OnlineinteractivereferenceslikeMDNWebDocs,CSS-Tricks,and30SecondsofCSSoffersearchable,up-to-dateguideswithexamples.2.DownloadablePDFsfromCheatography,GitHub,orcodingbootcampsprovideoff
    CSS Tutorial . Web Front-end 461 2025-06-27 01:12:20
  • What are the best practices for overriding styles and managing specificity in CSS Selectors?
    What are the best practices for overriding styles and managing specificity in CSS Selectors?
    Understanding and rationally utilizing the weighting mechanism of selectors is the key to solving the problem of CSS style coverage, rather than relying on !important or inline styles. 1. Specificity consists of four types of weights, including ID, class/attribute/pseudo-class, element/pseudo-element selector, etc., and these weights determine the final style rules; 2. Using BEM naming specifications can reduce specific conflicts caused by nesting and improve maintainability; 3. Reasonably organize hierarchical structures, avoid deep nesting, and give priority to using a single class name to define styles; 4. Modern CSS provides @layer and:where() tools to more finely control the cascade order, help alleviate the style confusion problem in large projects.
    CSS Tutorial . Web Front-end 653 2025-06-27 01:07:51
  • CSS tutorial on how to center a div
    CSS tutorial on how to center a div
    To center a div, you need to select methods according to your needs: 1. You can use margin:0auto horizontally, which is suitable for fixed-width block-level elements; 2. We recommend Flexbox horizontally and vertically, set the container to display:flex and set justify-content and align-items as center; 3. You can use transform:translate (-50%,-50%) to coordinate top:50% and left:50%. Each method corresponds to different scenarios, and the selection depends on the layout requirements.
    CSS Tutorial . Web Front-end 195 2025-06-27 00:48:51
  • What is the difference between a pseudo-class and a pseudo-element in CSS Selectors?
    What is the difference between a pseudo-class and a pseudo-element in CSS Selectors?
    The difference between pseudo-classes and pseudo-elements in CSS is that they have different goals. Pseudo-classes are used to select existing elements in a specific state, such as:hover, :active, or :first-child; while pseudo-elements are used to style parts of elements that do not belong to the actual DOM node, such as:first-letter or insert content through ::before and ::after. The two start with a single colon and a double colon respectively, and pseudo-classes are often used to respond to user interaction or document structure conditions, while pseudo-elements are used to enhance layout or add decorative effects.
    CSS Tutorial . Web Front-end 248 2025-06-27 00:44:11
  • How to use CSS Grid and Flexbox together tutorial
    How to use CSS Grid and Flexbox together tutorial
    CSSGrid and Flexbox each have their own expertise, and the best results are used together. Grid is a two-dimensional layout that is suitable for the overall page structure, such as the arrangement of the header, sidebar, main content area, and footer; Flexbox is a one-dimensional layout that is more suitable for internal arrangement of components, such as navigation bar, button group, card list, etc. For example, use Grid in the middle of the three-column layout and then block up and down, and use Flexbox to automatically align several buttons in a row. The actual combination method is: the outer container uses display:grid to define the overall framework, and the child elements are arranged using display:flex in each area. Common structures include the entire page using Grid to divide blocks, and the navigation bar, button group and card list are aligned with Flexbox. Note
    CSS Tutorial . Web Front-end 779 2025-06-27 00:40:11
  • What is a 'mobile-first' approach in responsive design?
    What is a 'mobile-first' approach in responsive design?
    Amobile-firstapproachinresponsivedesignmeansprioritizingthedesignanddevelopmentofawebsiteformobiledevicesfirst,beforescalinguptolargerscreens.1.Itforcesdesignerstofocusoncorecontentandfunctionalityduetolimitedscreenspace.2.Itimprovesperformancebyredu
    CSS Tutorial . Web Front-end 858 2025-06-27 00:35:11

Tool Recommendations

jQuery enterprise message form contact code

jQuery enterprise message form contact code is a simple and practical enterprise message form and contact us introduction page code.
form button
2024-02-29

HTML5 MP3 music box playback effects

HTML5 MP3 music box playback special effect is an mp3 music player based on HTML5 css3 to create cute music box emoticons and click the switch button.

HTML5 cool particle animation navigation menu special effects

HTML5 cool particle animation navigation menu special effect is a special effect that changes color when the navigation menu is hovered by the mouse.
Menu navigation
2024-02-29

jQuery visual form drag and drop editing code

jQuery visual form drag and drop editing code is a visual form based on jQuery and bootstrap framework.
form button
2024-02-29

Organic fruit and vegetable supplier web template Bootstrap5

An organic fruit and vegetable supplier web template-Bootstrap5
Bootstrap template
2023-02-03

Bootstrap3 multifunctional data information background management responsive web page template-Novus

Bootstrap3 multifunctional data information background management responsive web page template-Novus
backend template
2023-02-02

Real estate resource service platform web page template Bootstrap5

Real estate resource service platform web page template Bootstrap5
Bootstrap template
2023-02-02

Simple resume information web template Bootstrap4

Simple resume information web template Bootstrap4
Bootstrap template
2023-02-02

Cute summer elements vector material (EPS PNG)

This is a cute summer element vector material, including the sun, sun hat, coconut tree, bikini, airplane, watermelon, ice cream, ice cream, cold drink, swimming ring, flip-flops, pineapple, conch, shell, starfish, crab, Lemons, sunscreen, sunglasses, etc., the materials are provided in EPS and PNG formats, including JPG previews.
PNG material
2024-05-09

Four red 2023 graduation badges vector material (AI EPS PNG)

This is a red 2023 graduation badge vector material, four in total, available in AI, EPS and PNG formats, including JPG preview.
PNG material
2024-02-29

Singing bird and cart filled with flowers design spring banner vector material (AI EPS)

This is a spring banner vector material designed with singing birds and a cart full of flowers. It is available in AI and EPS formats, including JPG preview.
banner picture
2024-02-29

Golden graduation cap vector material (EPS PNG)

This is a golden graduation cap vector material, available in EPS and PNG formats, including JPG preview.
PNG material
2024-02-27

Home Decor Cleaning and Repair Service Company Website Template

Home Decoration Cleaning and Maintenance Service Company Website Template is a website template download suitable for promotional websites that provide home decoration, cleaning, maintenance and other service organizations. Tip: This template calls the Google font library, and the page may open slowly.
Front-end template
2024-05-09

Fresh color personal resume guide page template

Fresh color matching personal job application resume guide page template is a personal job search resume work display guide page web template download suitable for fresh color matching style. Tip: This template calls the Google font library, and the page may open slowly.
Front-end template
2024-02-29

Designer Creative Job Resume Web Template

Designer Creative Job Resume Web Template is a downloadable web template for personal job resume display suitable for various designer positions. Tip: This template calls the Google font library, and the page may open slowly.
Front-end template
2024-02-28

Modern engineering construction company website template

The modern engineering and construction company website template is a downloadable website template suitable for promotion of the engineering and construction service industry. Tip: This template calls the Google font library, and the page may open slowly.
Front-end template
2024-02-28