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  • How to create a checkerboard pattern with CSS?
    How to create a checkerboard pattern with CSS?
    To implement checkerboard pattern, two methods can be used for CSS. 1. Use background-image to combine linear-gradient to create a background checkerboard. The grid size is controlled by setting background-size, which is suitable for background images; 2. Use HTML structure to match Flex or Grid layout, and set different background colors through parity selectors, which is suitable for scenes where each grid needs to be independently controlled. In addition, attention should be paid to color comparison, responsive adaptation and performance optimization. The two methods have their own advantages and can be flexibly selected according to needs.
    CSS Tutorial . Web Front-end 636 2025-07-19 02:19:41
  • Why is my CSS not working
    Why is my CSS not working
    CSSnotworking is usually caused by several common problems. 1. Check for syntax errors, such as missing semicolons or spelling errors, and make sure the brackets match; 2. Make sure the CSS file path is correct and the HTML is correctly referenced; 3. Resolve specific conflicts, such as selector priority or !important override; 4. Clear the browser cache, try hard refreshing or disabling the cache to load the latest styles. Using developer tools to gradually troubleshoot can effectively locate the root cause of the problem.
    CSS Tutorial . Web Front-end 664 2025-07-19 02:18:20
  • Describe the difference between `==` and `===` in JavaScript (Oops, wrong language - stick to CSS)
    Describe the difference between `==` and `===` in JavaScript (Oops, wrong language - stick to CSS)
    There are no == or == operators in CSS, they belong to programming languages such as JavaScript. CSS uses selectors and properties to apply styles, rather than comparisons or evaluations. 1. The attribute selector [attr=value] is used for exact matches, similar to strict matches ===; 2. Use ~=, |=, ^=, $=, *=, etc. to achieve partial or fuzzy matches, similar to the behavior of loose matches ==. Choose the right matching method according to your needs to ensure accuracy and performance.
    CSS Tutorial . Web Front-end 768 2025-07-19 02:15:01
  • How does browser default stylesheet affect rendering?
    How does browser default stylesheet affect rendering?
    Browser default styles ensure basic readability by automatically applying margins, fills, fonts, and form element styles, but can cause inconsistent cross-browser layouts. 1. The default margin and fill change the layout flow, such as the spacing of titles, paragraphs and lists; 2. The default font settings affect readability, such as 16px font size and TimesNewRoman font; 3. The form elements are very different in different browsers, so the appearance needs to be reset; 4. Some tags such as strong and em have default emphasis styles and need to be explicitly overwritten. Workarounds include using Normalize.css, reset styles, or globally clear margins and fills, while customizing fonts and form styles for consistency.
    CSS Tutorial . Web Front-end 595 2025-07-19 02:08:30
  • How to use the `:nth-child()` selector?
    How to use the `:nth-child()` selector?
    The :nth-child() selector selects the element's position in the same level. The syntax is:nth-child(an b), where a is the interval and b is the offset. For example, tr:nth-child(2n 1) selects all odd rows, li:nth-child(3n) selects each third list item. Common uses include applying different background colors to the table's parity rows, emphasizing the first three items of the list, or adding styles for every four gallery items. Notes include: It counts all sibling elements rather than just specific tag types. If you want to select a specific type, you should use:nth-of-type(). The browser count starts at 1 and negative values can be matched from the end. Master its formulas and counting methods and use more efficiently
    CSS Tutorial . Web Front-end 809 2025-07-19 02:02:51
  • Explain the adjacent sibling combinator (` `)
    Explain the adjacent sibling combinator (` `)
    Theadjacentsiblingcombinator( )inCSStargetsanelementthatdirectlyfollowsanotherspecificelementwiththesameparent.1.Itselectstheimmediatesiblingafteraspecifiedelement.2.Itrequiresbothelementstosharethesamedirectparent.3.Itisusefulforstylingelementsbased
    CSS Tutorial . Web Front-end 659 2025-07-19 01:59:50
  • How do CSS container queries work?
    How do CSS container queries work?
    CSScontainerqueriesallowstylingelementsbasedontheircontainer'ssize,nottheviewport.1.Defineacontainmentcontextwithcontainer-type:inline-sizeorsize.2.Use@containerrulestoapplystylesconditionally.3.Namecontainerswithcontainer-nameforspecificity.4.Idealf
    CSS Tutorial . Web Front-end 133 2025-07-19 01:55:31
  • What are variable fonts and how to use them with CSS?
    What are variable fonts and how to use them with CSS?
    Variablefonts are a single font file that contains a variety of font variations, such as thickness, width and italics, and are identified by .woff2 format and specific metadata. When using it, you need to declare the supported axis range through @font-face and flexibly adjust it in CSS. Its advantages lie in efficiency and design flexibility, but attention should be paid to browser compatibility and avoid excessive overlay styles.
    CSS Tutorial . Web Front-end 621 2025-07-19 01:39:50
  • What is the CSS :target pseudo-class used for?
    What is the CSS :target pseudo-class used for?
    CSS's :target pseudo-class is used to match and style target elements in the page based on the URL's fragment identifier (last part). 1. It is often used to highlight the page area that users jump to through anchor links, such as highlighting the target section through background color or border; 2. It can be used for simple tab pages or accordion effects without JavaScript, and control the display and hiding of the target elements through display attributes; 3. It can combine transition to achieve smooth animation effects when target switching; 4. It only takes effect when the URL fragment matches the element id, and does not affect the browser's default scrolling behavior, and is not supported but elegantly downgraded in old browsers such as IE8 and below.
    CSS Tutorial . Web Front-end 267 2025-07-19 01:17:40
  • How do you apply different font styles and weights?
    How do you apply different font styles and weights?
    Toapplyfontstylesandweightseffectively,useboldanditalicforemphasis,understandextendedfontweights,andapplythembasedoncontext.1.Useboldforheadingsorstandouttextanditalicfortitlesorsubtleemphasis,applyingviashortcutslikeCtrl BorCtrl Ibutavoidingoveruse.
    CSS Tutorial . Web Front-end 373 2025-07-19 01:06:31
  • How to add a background image in CSS
    How to add a background image in CSS
    How to add a background image to a web page: 1. Use the background-image attribute to introduce the image path; 2. Use background-repeat to control duplication; 3. Use background-size to set the image size; 4. Use background-position to adjust the display position; 5. Use background-attachment to fix the background image; 6. Add colors or gradients to improve readability. The specific operation is to first use background-image to specify the image path, then set no-repeat to avoid duplication, cover the adaptive screen, center display, fixed to fix the background image, and finally pass
    CSS Tutorial . Web Front-end 302 2025-07-19 01:04:30
  • Explain the CSS `float` property and how to clear floats
    Explain the CSS `float` property and how to clear floats
    The float attribute of CSS is used to float the element left or right so that other content (such as text) can surround it; when all child elements float, the container may collapse, so the float needs to be cleared. Specific methods include using clearfix, overflow attributes or adding clear elements; Flexbox and Grid have replaced floats in modern layouts, but they are still applicable in scenarios such as text-surrounding pictures.
    CSS Tutorial . Web Front-end 578 2025-07-19 00:57:50
  • Describe the use of the `calc()` function in CSS
    Describe the use of the `calc()` function in CSS
    CSS's calc() function supports addition, subtraction, multiplication and division operations to make layout values more flexible. ① It simplifies responsive layouts, such as width:calc (100%-200px) that can dynamically calculate width; ② It automatically processes mixed units such as px, %, em, rem, vw, vh, but pay attention to the spaces around the operator; ③ It is suitable for a variety of attributes, such as top, left positioning, grid/elastic box spacing, transparency or transform values; ④ Compatible with modern browsers, suitable for creating intelligent adaptive layouts.
    CSS Tutorial . Web Front-end 293 2025-07-19 00:21:00
  • What is rem vs em vs px in CSS
    What is rem vs em vs px in CSS
    px is a fixed unit, suitable for elements that do not need to be scaled; em is a relative unit relative to the parent element, suitable for scaling within the component; rem is a relative unit relative to the root element, suitable for layout and fonts to maintain consistency and scalability. When used specifically, px is used to fix sizes such as borders or icons, em is used for scenes that need to be scaled with parent elements such as buttons, and rem is used for most layouts and text designs to improve accessibility and consistency. Which unit to choose depends on the design requirements, and each unit has its applicable scenarios.
    CSS Tutorial . Web Front-end 601 2025-07-19 00:16:00

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