亚洲国产日韩欧美一区二区三区,精品亚洲国产成人av在线,国产99视频精品免视看7,99国产精品久久久久久久成人热,欧美日韩亚洲国产综合乱

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

  • What are CSS container queries and how do they differ from media queries?
    What are CSS container queries and how do they differ from media queries?
    CSScontainerqueriesallowstylingelementsbasedontheirparentcontainer’ssize,nottheviewport.1.TheyenableresponsivecomponentsthatadapttolocalcontextswithoutJavaScript.2.Usecontainer-typetodefineacontainmentcontextand@containertoapplystylesconditionally.3.
    CSS Tutorial . Web Front-end 759 2025-07-23 02:14:11
  • How to improve CSS performance?
    How to improve CSS performance?
    The core of improving CSS performance is to reduce the overhead of browser style calculation and layout reordering. Specific methods include: 1. Avoid the use of complex selectors, such as deep nesting, wildcards and attribute selectors, and it is recommended to use efficient class selectors; 2. Reduce style reordering and redrawing, avoid frequent layouts by modifying class at one time, using GPU accelerated attributes, and batch operation of DOM; 3. Reasonably split CSS files, prioritize loading of key styles, compress and merge code to reduce volume; 4. Use BEM naming specifications to reduce conflicts, improve maintainability, thereby optimizing page rendering speed and enhancing user experience.
    CSS Tutorial . Web Front-end 411 2025-07-23 02:12:21
  • Explain Grid template areas and lines
    Explain Grid template areas and lines
    grid-template-areas are suitable for overall structural design, and the layout is intuitively defined with named regions; 1. For example, in the three-column layout, the area is defined by strings such as "headerheaderheader"; 2. Each child element specifies the corresponding name through grid-area; 3. Suitable for responsive design and modular layout; grid-template-lines are suitable for precise control, and the area position is defined by row and column numbers; 1. For example grid-column and grid-row specify the starting and end rows; 2. High flexibility, suitable for dynamic layout; 3. The two cannot be mixed, but grid-template-areas can be used to match gr
    CSS Tutorial . Web Front-end 638 2025-07-23 02:08:50
  • How to select adjacent siblings in CSS?
    How to select adjacent siblings in CSS?
    The adjacent brother selector is a sibling element in CSS that is immediately following an element after a symbol. For example, h2 p selects the first p and sets the color to red, but only the next sibling elements, and both must be of the same level, and there cannot be other nodes in the middle. Common uses include adding styles to the first paragraph under the title, controlling the spacing of form elements, underline navigation bar activation items, etc. If you need to select all subsequent sibling elements, you should use the general sibling selector ~, such as h2~p, all subsequent p elements will be selected.
    CSS Tutorial . Web Front-end 164 2025-07-23 02:01:31
  • Explain the difference between `position: absolute` and `position: fixed`
    Explain the difference between `position: absolute` and `position: fixed`
    The main differences between position:absolute and position:fixed are positioning benchmarks and scrolling behaviors; 1. Absolute is positioned relative to the nearest positioning ancestor elements. If not, the viewport shall be the basis and scrolling with the page; 2. Fixed is always positioned relative to the browser window and does not move with the page scrolling; 3. Both are separated from the document flow, but the hierarchical relationship is affected by different contexts; 4. Absolute is often used for internal positioning of components such as pop-up windows and drop-down menus, fixed is suitable for global fixed elements such as navigation bars and back to top buttons; 5. When using it, pay attention to the setting of parent element positioning attributes and mobile compatibility issues.
    CSS Tutorial . Web Front-end 204 2025-07-23 01:52:31
  • How to create a background gradient using CSS?
    How to create a background gradient using CSS?
    The way to add background gradients to a web page is to use CSS's background-image with linear-gradient or radial-gradient. 1. The most common linear gradient is the up and down direction, the syntax is background-image:linear-gradient(tobottom, white, lightgray) or abbreviated as background-image:linear-gradient(#fff,#f0f0f0); 2. The direction can be changed, such as toright means a gradient from left to right; 3. Radial gradient is suitable for the circular diffusion effect, and the syntax is background-
    CSS Tutorial . Web Front-end 202 2025-07-23 01:52:10
  • Explain descendant and child selectors
    Explain descendant and child selectors
    The difference between a child selector and a child element selector is that it matches nested levels. 1. The child selector (denoted by spaces) matches descendant elements at any nested level. For example, .parent.child will select all .child elements inside .parent, no matter how deep the nested; 2. The child element selector (denoted by >) only matches direct child elements, such as .parent>.child selects only .child of .parent. Styles affect all matching descendants when using child selectors, while child element selectors affect only direct child elements, which is especially important when building navigation bars or multi-level lists.
    CSS Tutorial . Web Front-end 566 2025-07-23 01:48:30
  • What are the best practices for writing maintainable CSS?
    What are the best practices for writing maintainable CSS?
    To maintain CSS for a long time, the key is to have clear structure, unified naming and clear logic. Specific practices include: 1. Organize CSS with a modular structure, split files by module, and use tools to merge to facilitate modification, collaboration and reuse; 2. Maintain a unified style of naming, use semantic names to avoid too deep levels, and recommend BEM or SMACSS specifications; 3. Avoid global pollution, and control scopes through CSS-in-JS, CSSModules or structural isolation; 4. Appropriate use of tools such as PostCSS, stylelint and preprocessors to improve code quality and standardize collaboration processes.
    CSS Tutorial . Web Front-end 546 2025-07-23 01:15:12
  • How does the `:hover` pseudo-class work?
    How does the `:hover` pseudo-class work?
    The:hoverpseudo-classinCSSworkswithmousepointersbutnotreliablyontouchscreens.1.Itactivateswhenauserhoversoveranelementwithoutclicking.2.Itdoesn’tworkwithkeyboardnavigationortouchinputbydefault.3.Somemobiledevicesbrieflyapply:hoverafteratap.4.Commonus
    CSS Tutorial . Web Front-end 156 2025-07-23 00:57:01
  • What is the purpose of the CSS `clip-path` property?
    What is the purpose of the CSS `clip-path` property?
    The clip-path attribute of CSS controls the display part of the element by defining the clip area, and supports basic shapes such as circles, ellipse and polygons, such as circle (50%) to create circular clipping areas; 1. Use inset(), circle(), ellipse(), and polygon() to achieve geometric shape clipping; 2. Reference SVG elements to create complex paths; 3. Support responsive design and animation transitions; 4. Pay attention to performance impact and browser compatibility. This feature is suitable for scenes such as image display, interactive buttons, etc., but it needs to be used reasonably.
    CSS Tutorial . Web Front-end 446 2025-07-23 00:47:42
  • Describe the `contain` property
    Describe the `contain` property
    ThecontainpropertyinCSSimprovesperformanceandlayoutcontrolbyisolatingelements.1.Itlimitslayout,style,paint,andsizeoperationswithinanelement,allowingbrowseroptimizations.2.Valuesincludelayout,paint,size,andstyle,eachrestrictingspecificbehaviors.3.Comb
    CSS Tutorial . Web Front-end 814 2025-07-22 03:16:30
  • What is the `:dir()` pseudo-class?
    What is the `:dir()` pseudo-class?
    Youwouldusethe:dir()pseudo-classinCSStoapplystylesbasedontheactualtextdirection—eitherleft-to-right(ltr)orright-to-left(rtl)—asdeterminedbythebrowser’sUnicodebidialgorithm,notlanguageattributes.1.IthelpsadjustUIelementslikemargins,padding,oriconsforR
    CSS Tutorial . Web Front-end 426 2025-07-22 03:12:30
  • What does !important do in CSS
    What does !important do in CSS
    !important is used in CSS to override other styles, by adding the !important flag, this style property will take precedence over conventional cascading and specificity rules. For example, if a paragraph sets p{color:red!important;}, even if there is a subsequent declaration of p{color:blue;}, the text color is still red. Its applicable scenarios include: ① Overwrite inline styles generated by third-party libraries or JavaScript that cannot be modified; ② Handle old code that is difficult to refactor; ③ Quick debugging or prototype design. However, it should be used with caution, as it will destroy the natural stacking logic of CSS, resulting in difficulty in maintenance and complex debugging. Alternatives include: ① Improve selector specificity; ② Add new class name control style; ③
    CSS Tutorial . Web Front-end 157 2025-07-22 03:04:00
  • CSS variables (custom properties) tutorial
    CSS variables (custom properties) tutorial
    CSS variables improve code maintenance and flexibility by defining reusable style values. It starts with -- and is called by var(), and is suitable for scenes such as unified colors and sizes. It is recommended to name according to purpose such as --color-primary, --font-size-base, and can be combined with component-level namespaces to avoid conflicts. Practical scenarios include theme switching, responsive design, and simplified component configuration. When using it, you need to pay attention to scope, correct calling method, default value settings and appropriate use. After mastering, it can effectively improve CSS maintainability and be compatible with mainstream browsers.
    CSS Tutorial . Web Front-end 129 2025-07-22 03:00:48

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