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  • CSS tutorial on variables and custom properties
    CSS tutorial on variables and custom properties
    CSS variables improve the neatness and maintenance of the code by storing reusable values ??and achieving one modification and multiple modifications. Its core role is to simplify stylesheet management and support dynamic updates and local scope control. When using it, you need to define variables with the -- prefix, call them through the var() function, pay attention to naming specifications and scope division, and be wary of spelling errors and compatibility issues. The specific points are as follows: 1. Use --prefix to define variables, usually declare global variables in: root; 2. Reference variables through the var() function; 3. Any CSS value such as color, size, shadow, etc. can be stored; 4. Local variables should be defined in a specific selector to avoid conflicts; 5. Dynamic updates can be achieved through JavaScript or media queries; 6
    CSS Tutorial . Web Front-end 546 2025-07-04 03:06:51
  • How to select an element by ID when it contains special characters using CSS Selectors?
    How to select an element by ID when it contains special characters using CSS Selectors?
    To select an ID element with special characters, you need to escape or use an attribute selector. First, use backslashes to escape special characters such as #user\:name in CSS; second, double escape is required in JavaScript to write #user\\:name; third, you can use the attribute selector [id='user:name'] instead to avoid escape problems and have better readability.
    CSS Tutorial . Web Front-end 504 2025-07-04 03:05:41
  • How to change the text selection color on a webpage using the ::selection pseudo-element with CSS Selectors?
    How to change the text selection color on a webpage using the ::selection pseudo-element with CSS Selectors?
    Want to customize the style of text selected by users on the web page? It can be implemented through the ::selection pseudo-element of CSS. ::selection allows setting some properties such as background color, font color, etc. of selected text, but does not support borders or gradient backgrounds. When using it, you can directly apply to specific tags or classes, such as p::selection or .highlight::selection. To ensure compatibility, it is recommended to add the -webkit- prefix to adapt to more devices. In addition, different selectors can be used to set different selection effects for various elements to improve the overall aesthetics of the page and user experience.
    CSS Tutorial . Web Front-end 991 2025-07-04 03:01:11
  • How do you define a simple CSS transition?
    How do you define a simple CSS transition?
    To define a simple CSS transition, use the transition attribute and specify the transition attribute, duration, and optional behavior. 1. Select commonly used animated properties such as color, background-color, opacity, transform and width; 2. Avoid trying non-animated properties such as display or content; 3. Use browser developer tools to quickly test the transition effect; 4. The basic transition needs to specify at least the transition attributes and duration, and time functions and delays can also be added; 5. When you need to respond to the end of the transition in JavaScript, use the transitionend event and pay attention to cleaning up the event listener. pass
    CSS Tutorial . Web Front-end 626 2025-07-04 02:59:01
  • How can you use attribute selectors to match parts of a value (e.g., ^=, $=, *=)?
    How can you use attribute selectors to match parts of a value (e.g., ^=, $=, *=)?
    The CSS attribute selector (^=, $=, \*) can be used to locate elements based on part of the attribute value. 1.^=Match the attribute value starting with a specific string, such as a[href^="https://"], select a link starting with "https://"; 2.$=Match the attribute value ending with a[href$=".pdf"], select a link ending with ".pdf"; 3.\*=Match the attribute value containing a specific substring, such as img[src*="logo"], select an image containing "logo" in src; 4. Multiple selectors can be used in combination to improve accuracy, such as img
    CSS Tutorial . Web Front-end 640 2025-07-04 02:58:30
  • What is CSS linting and what tools can be used for it?
    What is CSS linting and what tools can be used for it?
    CSSlintinghelpscatcherrorsandenforcecodequalityinstylesheets.Itchecksforsyntaxissues,enforcesteam-widestandards,avoidsinefficientpatterns,andimprovesmaintainability.PopulartoolsincludeStylelintforconfigurability,CSSLintforperformancechecks,PostCSSwit
    CSS Tutorial . Web Front-end 187 2025-07-04 02:57:20
  • How to create a parallax scrolling effect CSS tutorial
    How to create a parallax scrolling effect CSS tutorial
    The key to making parallax scrolling effect is to allow elements of different layers to scroll at different speeds. 1. First, build a multi-layer HTML structure, including background, medium scene and foreground, and use CSS to set the container overflow:hidden and absolute positioning; 2. Then listen to scroll events through JavaScript, use transform:translateY() to dynamically adjust the positions of each layer. The background layer scrolls slowly and the medium scene is slightly faster; 3. Finally, optimize performance, use throttling functions to control the scrolling frequency, compress image resources and adapt to the mobile terminal, and consider pure CSS solutions to improve compatibility.
    CSS Tutorial . Web Front-end 819 2025-07-04 02:43:40
  • How does the prefers-reduced-motion media query improve accessibility?
    How does the prefers-reduced-motion media query improve accessibility?
    Theprefers-reduced-motionmediaqueryhelpsimproveaccessibilitybyrespectinguserpreferencesforreducedmotion,whichbenefitsthosewithvestibulardisorders,migraines,andcognitivesensitivities.1.ItdetectsiftheuserhasenabledreducedmotionintheirOSsettings.2.Devel
    CSS Tutorial . Web Front-end 508 2025-07-04 02:32:31
  • Why is it important to maintain color contrast for readability?
    Why is it important to maintain color contrast for readability?
    Goodcolorcontrastisessentialforreadabilityandaccessibilitybecauseitensurescontentisusableforeveryone.Poorcontrast,suchaslightgraytextonwhiteorpaleyellowonwhite,makesreadingslowerandmoretiring,especiallyforpeoplewithvisualimpairmentsorinless-than-idea
    CSS Tutorial . Web Front-end 239 2025-07-04 02:25:30
  • What is the CSS Painting API?
    What is the CSS Painting API?
    TheCSSPaintingAPIenablesdynamicimagegenerationinCSSusingJavaScript.1.DeveloperscreateaPaintWorkletclasswithapaint()method.2.TheyregisteritviaregisterPaint().3.ThecustompaintfunctionisthenusedinCSSpropertieslikebackground-image.Thisallowsfordynamicvis
    CSS Tutorial . Web Front-end 1045 2025-07-04 02:16:10
  • Can you find an element by its text content using only CSS Selectors?
    Can you find an element by its text content using only CSS Selectors?
    Yes,youcanusethe:contains()pseudo-classinCSStofindelementsbytextcontent.1.Thesyntaxiselement:contains("text"),targetinganyelementcontainingthespecifiedtext.2.Itperformscase-sensitiveandpartialmatchesbydefault,meaningitwillmatchifthetextappe
    CSS Tutorial . Web Front-end 733 2025-07-04 02:02:51
  • How to create a print-friendly stylesheet CSS tutorial
    How to create a print-friendly stylesheet CSS tutorial
    To create a print-friendly style sheet, first use @mediaprint or link print.css file to separate the print style; secondly, hide irrelevant elements such as navigation bar, sidebar and remove background to save ink; finally adjust the font size, font type and margins to improve readability. The specific steps include: 1. Specify the printing style through the @mediaprint rule or HTML link; 2. Set display:none to hide non-essential elements in the printing style, and set the background to white, the text to black, and the link to display the URL; 3. Set the font size to 12pt, use serif fonts, set the margins and the adaptive width of the picture to avoid forced horizontal printing. During testing, you can verify the effect by exporting PDF.
    CSS Tutorial . Web Front-end 855 2025-07-04 01:08:01
  • What is the prefers-reduced-motion media feature for accessibility?
    What is the prefers-reduced-motion media feature for accessibility?
    Reducedmotionisafeaturethathelpsuserswithmotionsensitivityorvestibulardisordersbyminimizinganimationsandmotiononwebsites.Itworksbydetectingtheuser’soperatingsystempreferencethroughCSSorJavaScript,allowingdeveloperstoconditionallyapplyordisableanimati
    CSS Tutorial . Web Front-end 581 2025-07-04 00:58:11
  • Tailwind CSS tutorial for beginners
    Tailwind CSS tutorial for beginners
    TailwindCSS is a practical class-first CSS framework that controls styles by using predefined classes directly on HTML elements. 1. You can first use CDN to introduce the experience during installation; 2. It is recommended to gradually transition to npm to install and configure tailwind.config.js file to load on demand; 3. Practical classes such as bg-blue-600, text-white, etc. for rapid construction of components; 4. Use layout classes such as flex and grid to combine responsive prefixes such as sm: and md: to achieve adaptation; 5. Customize theme colors, fonts and other options through tailwind.config.js. After mastering common categories and structures, development efficiency will be greatly improved.
    CSS Tutorial . Web Front-end 676 2025-07-03 01:50:50

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