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  • Customizing scrollbar appearance with CSS pseudo-elements
    Customizing scrollbar appearance with CSS pseudo-elements
    Use CSS pseudo-element::-webkit-scrollbar to customize the scrollbar style, 1. Set the scrollbar width; 2. Define the track background color; 3. Set the slider color and rounded corners; 4. Add a hover effect; 5. Apply styles to specific containers. Firefox uses scrollbar-width and scrollbar-color for simple control. IE/old browsers need to accept the default style or use plug-ins instead. Hide the scroll bar to set display:none, and pay attention to color matching and responsive design, and beautify it moderately to enhance the experience.
    CSS Tutorial . Web Front-end 653 2025-07-11 03:13:50
  • Working with background images and CSS properties
    Working with background images and CSS properties
    How to set web page background image with CSS and optimize loading? First, select the appropriate background image, select JPG/WebP/PNG format according to the purpose, and pay attention to copyright in a unified style; second, use CSS attributes to set the background image, including background-image specified path, background-repeat control duplication, background-size and background-position adaptation to the screen; third, optimize the loading speed, improve the user experience by compressing images, using WebP format, delaying loading, adding transition effects and setting transition colors.
    CSS Tutorial . Web Front-end 853 2025-07-11 03:12:51
  • Handling content overflow with CSS properties
    Handling content overflow with CSS properties
    To handle content overflow, you can use the CSS overflow property, set to hidden to hide the content beyond it; if you need to display the scroll bar, use overflow:auto or overflow-y:scroll; text-overflow:ellipsis can be used. Specific methods include: 1. Use overflow:hidden to apply to areas with fixed heights and no scrolling; 2. Combine max-height and overflow-y:auto to achieve content scrolling; 3. Combine white-space and text-overflow to achieve single-line omission; 4. Combine multiple attributes to improve flexibility, such as keeping spaces
    CSS Tutorial . Web Front-end 161 2025-07-11 02:46:51
  • Crafting a sticky footer layout using modern CSS
    Crafting a sticky footer layout using modern CSS
    To achieve a sticky footer, use Flexbox or Grid layout. 1. When using Flexbox, set the container to flex and set flex-direction:column to make the main content area expandable to fill the space; 2. When using Grid, define the row height through grid-template-rows to allow the main content to occupy the remaining space; 3. Pay attention to the mobile browser viewport problem and avoid directly using vh units or dynamically calculating the height to ensure the layout is displayed correctly. These methods can effectively achieve sticky footer effect.
    CSS Tutorial . Web Front-end 360 2025-07-11 02:42:10
  • What are viewport units (vw, vh, vmin, vmax)?
    What are viewport units (vw, vh, vmin, vmax)?
    Viewport units are relative units based on browser viewport size in CSS, used to create responsive layouts. 1. vw and vh represent 1% of the viewport width and height respectively. For example, 10vw is 10% of the width and 20vh is 20% of the height, which is suitable for full-screen display or fixed proportional elements; 2. vmin and vmax are calculated based on the smaller or larger edges of the viewport. For example, vmin equals vh and vmax equals vw in landscape screen, which is suitable for adapting to different screen directions; 3. Usage techniques include setting responsive fonts with vw (with media query limit range) and 100vh to implement full-screen blocks, but it is necessary to note that the mobile address bar affects the visual area, which can be solved by 100dvh or JavaScript.
    CSS Tutorial . Web Front-end 724 2025-07-11 02:34:51
  • Implementing CSS Dark Mode using media queries and custom properties
    Implementing CSS Dark Mode using media queries and custom properties
    To implement dark mode, three methods can be adopted: 1. Use prefers-color-scheme media to query and detect system preferences and automatically apply dark styles; 2. Use CSS custom attributes to uniformly manage color themes, improve maintenance efficiency and facilitate subsequent expansion; 3. Add buttons to manually switch themes through JavaScript, and save user selections in combination with localStorage. Combining these three methods can achieve a complete solution that prioritizes response to system settings and supports user-defined customization.
    CSS Tutorial . Web Front-end 1016 2025-07-11 02:31:41
  • CSS Flexbox tutorial for layout design
    CSS Flexbox tutorial for layout design
    Flexbox is a one-dimensional model for web layout, especially suitable for responsive design. Create elastic containers by setting display:flex; to easily control the arrangement, alignment and scaling of child elements. The arrangement direction is controlled by flex-direction and supports row, row-reverse, column and column-reverse. Center alignment can be achieved through justify-content (spindle) and align-items (crossing axis), and common values ??include center, flex-start, flex-end, space-between, and space-around. Project scaling depends on Fle
    CSS Tutorial . Web Front-end 817 2025-07-11 01:52:30
  • Clearing floats using various CSS methods
    Clearing floats using various CSS methods
    Clearing floats is the key to solving CSS layout problems. When elements float, they will detach from the document stream, causing the container to collapse highly, affecting the layout effect. Common solutions are: 1. Use the clearfix method to insert content and clear floats through pseudo-elements, which is suitable for modern browsers without additional HTML elements; 2. Use overflow attributes (such as overflow:hidden or overflow:auto) to allow the container to contain floating elements, which is simple but may generate scroll bars; 3. Insert empty elements with clear:both style to force clear floats, which is effective but adds non-semantic tags; 4. Use modern layout technologies such as Flexbox or Grid to replace floating to make the layout more
    CSS Tutorial . Web Front-end 751 2025-07-11 01:50:10
  • How to use ::before and ::after pseudo-elements with CSS Selectors?
    How to use ::before and ::after pseudo-elements with CSS Selectors?
    Using CSS's ::before and ::after pseudo-elements can insert content before and after HTML elements, and are often used to add decorations, icons or separators; 1. It must be used with the content attribute, and can be an empty string; 2. The insertion of content is an inline element and cannot be operated by JS by default; 3. Common uses include inserting arrows, dots, logos, etc., and supports attr() to obtain attribute values, Unicode characters, font icons and background images; 4. It can combine selectors such as nth-child and class names to achieve fine-grained control; 5. Be careful not to act on self-closed tags, hierarchies may be overwritten, affect accessibility and old IE compatibility issues.
    CSS Tutorial . Web Front-end 775 2025-07-11 01:49:50
  • How does the z-index property work and what are stacking contexts?
    How does the z-index property work and what are stacking contexts?
    z-index works in CSS with a dependency on positioning and stacking context and cannot be effective alone. Elements must be positioned in relative, absolute, fixed or sticky before using z-index; 1. Elements in different stacking contexts will not directly compare z-index values; 2. The stacking context is created by the root element, positioning elements with z-index set, etc.; 3. Common problems such as the menu is blocked, it can be solved by improving the z-index of the entire container; 4. The modal box should be placed under the body to avoid nesting in low-level contexts; 5. The hierarchy range should be planned instead of abuse of high numerical values, such as UI overlay layer 1000, modal box 2000, prompt 3000, notification 4000. reason
    CSS Tutorial . Web Front-end 820 2025-07-11 01:07:01
  • Deep dive into the CSS Box Model properties and calculations
    Deep dive into the CSS Box Model properties and calculations
    The core of the box model is the calculation rules of element size, and understanding it can avoid layout problems. 1. The standard box model consists of content, padding, border, and margin. Width only refers to the content area by default; 2. The actual width = width padding border, margin does not participate in the calculation; 3. Use box-sizing: border-box to make width include padding and border; 4. Common misunderstandings include nested padding affecting alignment, percentage width calculation deviation, and table-cell is not affected by box-sizing; 5. It is recommended to set box-sizing uniformly and use developer tools to check
    CSS Tutorial . Web Front-end 646 2025-07-11 00:10:21
  • What is the :placeholder-shown pseudo-class for?
    What is the :placeholder-shown pseudo-class for?
    The :placeholder-shown pseudo-class is used to style the input box when the placeholder text is visible, and it takes effect when the user does not enter content. 1. It is suitable for form scenes that require visual feedback, such as distinguishing empty fields from filled fields; 2. It can be used to adjust borders, background colors or control other elements to display and hide; 3. It acts on elements with placeholder attributes; 4. Common uses include highlighting required items, changing border colors or adding transition animations; 5. Pay attention to its incompatibility and its differences from ::placeholder, which is used to directly style the placeholder text.
    CSS Tutorial . Web Front-end 892 2025-07-11 00:02:01
  • Using CSS variables (custom properties)
    Using CSS variables (custom properties)
    CSS variables (custom attributes) are defined at the beginning, such as --main-color:#333;, which can be dynamically referenced and modified in CSS, suitable for topic switching and style management. 1. Defining variables are usually in: root or specific elements, such as: root{--main-color:#333;}; 2. When using var(--variable name), such as color:var(--main-color); 3. You can set the default value to prevent errors, such as var(--main-color,#000); Common uses include: 1. Unified management of theme colors, and style changes by switching variables; 2. Avoid duplicate code, and centrally manage color, spacing and other values; 3. Dynamic
    CSS Tutorial . Web Front-end 934 2025-07-10 14:07:31
  • Optimizing css for performance: techniques and best practices
    Optimizing css for performance: techniques and best practices
    TooptimizeCSSforfasterwebsites,firstminifyandcombineCSSfilestoreducesizeandHTTPrequests.Second,useefficientselectorsbyavoidingoverqualificationanddeepnesting.Third,leveragecriticalCSSbyinliningessentialstylesandloadingnon-criticalCSSasynchronously.Fo
    CSS Tutorial . Web Front-end 632 2025-07-10 14:07:11

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