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  • Applying styles based on element attributes using css attribute selectors
    Applying styles based on element attributes using css attribute selectors
    The CSS attribute selector can apply styles based on the attributes and attribute values ??of the element to achieve precise control of specific elements. Style settings are performed by whether there are attributes, exact matches or partial matches attribute values, and combining multiple attribute conditions. For example: 1. When the attribute exists, select: a[download] matches all links with download attributes; 2. Exactly match attribute values: input[type="text"] only matches input boxes with type text; 3. Partial match attribute values: a[href*="example.com"] matches links containing keywords, img[src$=".jpg
    CSS Tutorial . Web Front-end 535 2025-07-07 00:31:41
  • How to override styles with !important CSS tutorial
    How to override styles with !important CSS tutorial
    !important is a keyword in CSS used to increase style priority. By adding !important after attribute value, it can bypass normal cascade order to make the style take effect as much as possible. 1. Suitable for third-party library style overlays, browser plug-ins or user scripts, quick debugging or temporary repairs; 2. The correct usage is to follow it immediately after the attribute value and before the semicolon, and should not be added to the selector or attribute name; 3. Common alternatives include using more specific selectors, adding class name combinations, using ID selectors, etc.; it is recommended to avoid abuse as much as possible to keep the code clear and easy to maintain.
    CSS Tutorial . Web Front-end 652 2025-07-07 00:13:01
  • CSS tutorial for creating loading spinners and animations
    CSS tutorial for creating loading spinners and animations
    There are three ways to create a CSS loading rotator: 1. Use the basic rotator of borders to achieve simple animation through HTML and CSS; 2. Use a custom rotator of multiple points to achieve the jump effect through different delay times; 3. Add a rotator in the button and switch classes through JavaScript to display the loading status. Each approach emphasizes the importance of design details such as color, size, accessibility and performance optimization to enhance the user experience.
    CSS Tutorial . Web Front-end 776 2025-07-07 00:07:50
  • Understanding the CSS Box Model and spacing
    Understanding the CSS Box Model and spacing
    The CSS box model is the core of web page layout. Each HTML element is composed of content, inner margin, border and outer margin; 1. The element size needs to consider the influence of padding and border, and the actual width = content padding × 2 border × 2; 2. The control spacing mainly depends on margin, but attention should be paid to the problem of vertical margin merging; 3. It is recommended to use box-sizing: border-box, so that width and height include padding and content, which is convenient for calculation; 4. Common problems in layout such as default margin in paragraphs, inline-block blank gap, and flex child element margin failure, etc.
    CSS Tutorial . Web Front-end 923 2025-07-06 02:07:51
  • Using the CSS aspect-ratio property
    Using the CSS aspect-ratio property
    The aspect-ratio attribute of CSS is used to set the aspect ratio of an element, such as 16:9 or 4:3, so that the browser automatically calculates the height or width according to the proportion. Common usage scenarios include: 1. The picture container maintains the proportion and avoids deformation; 2. The video embedding is more stable without padding skills; 3. The unified cell proportion in the grid layout. Notes include: After setting width and height, aspect-ratio may fail. Pay attention to browser compatibility and adjust the image display effect with object-fit.
    CSS Tutorial . Web Front-end 538 2025-07-06 02:06:10
  • CSS Animations: Can I use them to create a video game?
    CSS Animations: Can I use them to create a video game?
    Yes,CSSanimationscanbeusedtocreatesimplegamesbuthavesignificantlimitations.1)Theyaresuitedforgamesrelyingonvisualeffects,likepuzzleorcasualgames.2)Theyarenotidealforcomplexgamemechanicsorhigh-performanceneeds,requiringJavaScriptforgamelogicandcontrol
    CSS Tutorial . Web Front-end 724 2025-07-06 02:02:31
  • Contrasting CSS display properties: block, inline, flex, grid
    Contrasting CSS display properties: block, inline, flex, grid
    CSSdisplaypropertiescontrolwebpagelayout.Blockelementstakefullwidthandstackvertically,inlineelementsflowwithintextwithoutlinebreaks,flexboxalignsitemsinrowsorcolumnswitheasyspacing,andgridmanagestwo-dimensionallayoutswithpreciserowandcolumncontrol.Us
    CSS Tutorial . Web Front-end 429 2025-07-06 02:00:50
  • Strategies for building responsive designs with CSS Media Queries
    Strategies for building responsive designs with CSS Media Queries
    The key to responsive design is to reasonably divide breakpoints and adjust the styles in a targeted manner. 1. Understand the basic structure of media query, use @media plus conditional judgment, such as setting styles according to screen width; multiple conditions can be combined to adapt to different devices. 2. Setting reasonable breakpoints should be based on content and design drafts. It is recommended to gradually adapt to large screens starting from the mobile terminal. Common reference values ??include vertical screen max-width:767px for mobile phones, vertical screens on tablets, and above 1023px for desktop browsers. 3. To modify the key styles in a targeted manner, you only need to adjust the parts that really need to be changed, such as layout switching, font size, image button size, element display and hidden. 4. Use the mobile-first strategy to write the mobile style first and then gradually expand it to improve loading speed and maintenance efficiency
    CSS Tutorial . Web Front-end 640 2025-07-06 01:59:11
  • Controlling element visibility with display: none vs visibility: hidden in css
    Controlling element visibility with display: none vs visibility: hidden in css
    To select display:none or visibility:hidden depends on whether element space is retained; 1. display:none completely removes elements, does not occupy space, and is suitable for dynamic control display; 2. visibility:hidden retains space, only visually hidden, suitable for animation or layout maintenance; 3. Note that display:none does not trigger the rendering tree, and cannot obtain the size, while visibility:hidden can still obtain the size through JS.
    CSS Tutorial . Web Front-end 126 2025-07-06 01:49:11
  • Using CSS Preprocessors effectively to write CSS
    Using CSS Preprocessors effectively to write CSS
    Using CSS preprocessors can improve maintainability and clarity of style sheets. 1. Nesting rules make the structure more intuitive, such as writing ul, li and a styles in .nav according to HTML hierarchy relationships, but the nesting should not exceed three layers; 2. Variables and Mixin improve reusability, such as using $primary-color to define the main tone, or using @mixin to encapsulate common style blocks to reduce duplicate code; 3. Modularly organize the code structure, merge multiple small files through @import, and split styles according to functions, which facilitates team collaboration and post-maintenance.
    CSS Tutorial . Web Front-end 836 2025-07-06 01:39:10
  • 1_60. How do you make an animation run infinitely?
    1_60. How do you make an animation run infinitely?
    To make the animation loop infinitely, it needs to set its repetition mode to a continuous loop. 1. In CSS, use the animation-iteration-count property and set it to infinite; 2. In JavaScript library such as GSAP, set repeat to -1 and enable the loop option in Anime.js; 3. In mobile development, Android can set repeatCount to infinite through XML, and iOS uses the repeatForever method of SwiftUI. At the same time, attention should be paid to performance management, interactive control and cross-device testing.
    CSS Tutorial . Web Front-end 468 2025-07-06 01:38:30
  • What is the difference between Sass and SCSS syntax?
    What is the difference between Sass and SCSS syntax?
    The main difference between Sass and SCSS is the syntax. SCSS uses curly braces {} and semicolon similar to standard CSS; to facilitate the transition from CSS, and supports direct copying of CSS code and adding variables, mixing and other functions; while Sass adopts indented syntax, no curly braces and semicolons are required, and relies on line breaks and spaces to define code blocks. It has a simpler style but is also easy to cause problems due to format errors. The two can be converted to each other through tools. Modern frameworks mostly use SCSS by default because they are easier to learn and have rich resources; file extensions are .sass and .scss respectively, and the choice should be based on personal or team preferences.
    CSS Tutorial . Web Front-end 252 2025-07-06 01:31:21
  • Optimizing CSS performance and file size
    Optimizing CSS performance and file size
    Optimizing CSS performance can improve loading speed and user experience. Specific methods include: 1. Reduce the complexity of selectors, replace multi-level nesting with class names, and avoid wildcards and excessive pseudo-class combinations; 2. Compress and merge CSS files, and use tools such as CSSNano to delete redundant content; 3. Prioritize loading of critical CSS and delay loading of non-critical styles; 4. Regularly check and delete unused redundant styles, and use DevTools and PurgeCSS to assist in cleaning.
    CSS Tutorial . Web Front-end 858 2025-07-06 01:30:31
  • Working with z-index and stacking contexts in css
    Working with z-index and stacking contexts in css
    The ineffectiveness of z-index is often due to the influence of the cascaded context. 1. The stacking context is the "space scope" of an element, and the stacking order of child elements is calculated independently; 2. The creation method includes setting positioning z-index, opacity is less than 1, transform, etc.; 3. z-index is only valid for positioning elements, and the levels cannot be directly compared when the parent-child level is in different contexts; 4. The browser comprehensively determines the stacking order based on the DOM order, positioning, layout method, etc.; 5. Practical problems such as the modal box is blocked, you need to check the context level and adjust the structure or z-index instead of blindly increasing the value.
    CSS Tutorial . Web Front-end 797 2025-07-06 01:22:30

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