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  • What is the `aspect-ratio` property used for?
    What is the `aspect-ratio` property used for?
    The aspect-ratio attribute of CSS is used to control the aspect ratio of elements to ensure that media elements maintain proportions under different screen sizes. 1. Commonly used in video and picture containers, such as setting aspect-ratio:16/9 to maintain the ratio. 2. It can prevent layout offsets caused by undetermined media size when the page is loaded. 3. Can be used in combination with layout methods such as Flexbox or Grid, such as setting aspect-ratio:1 to achieve square images. 4. Pay attention to the conflicts that may be caused by width and height definitions when using it, and it is recommended to test cross-browser.
    CSS Tutorial . Web Front-end 278 2025-07-22 02:57:10
  • Explain the difference between `px`, `pt`, and `pc` units
    Explain the difference between `px`, `pt`, and `pc` units
    px, pt and pc are common units in web design and typesetting, but have different uses. 1.px (pixels) is the basic unit of screen display, used for front-end layout, such as font size, margins and element size. The advantages are good compatibility and support consistent scaling; 2.pt (dot) is a printing unit, 1pt=1/72 inch, suitable for printing style and PDF layout, but the screen display is affected by the device; 3.pc (pick card) is a larger printing unit, 1pc=12pt, which is rarely used now, because of poor readability and compatibility, there is no obvious advantage. Understanding the differences will help to select units reasonably according to project needs.
    CSS Tutorial . Web Front-end 601 2025-07-22 02:48:12
  • How do you create CSS gradients?
    How do you create CSS gradients?
    CSSgradientsarecreatedusingthebackground-imagepropertywithlinear-gradient()orradial-gradient().1.Startbychoosingagradienttypeanddirection,suchastoright,tobottom,orcustomangles.2.Definecolorsinorder,usingnamedcolors,hex,RGB,orHSL.3.Addcolorstopsforpre
    CSS Tutorial . Web Front-end 892 2025-07-22 02:41:00
  • What is the CSS `initial` value?
    What is the CSS `initial` value?
    CSS's initial is used to reset properties to browser default state, which does not depend on inheritance and is suitable for clearing global style effects. Use scenarios include: 1. Reset margin or padding that is disturbed by global style; 2. Remove the border or color set by the high-level DOM; 3. Restore font, background, display attributes, etc. to the default value. Note that initial is not "blank", such as color:initial is usually black. In addition, initial is different from unset and revert. It forces it to be set to the browser default, while unset changes according to whether the attribute inherits behavior, and revert falls back to the user agent or author style sheet settings.
    CSS Tutorial . Web Front-end 756 2025-07-22 02:29:51
  • How to style forms using CSS?
    How to style forms using CSS?
    To beautify a form, you need to start from three aspects: basic style, button style and layout responsiveness. First, add basic styles such as padding, border, rounded corners, font adjustments, etc. to the input box; secondly, design the background color, hover state and disable style of the button; finally, control the form structure through flex or grid layout, set the label alignment and adapt to the mobile screen, thereby improving the overall aesthetics and user experience.
    CSS Tutorial . Web Front-end 968 2025-07-22 02:25:10
  • Explain the `overflow` property and its common values
    Explain the `overflow` property and its common values
    overflow is an attribute in CSS that controls the overflow behavior of element content. Common values include: 1.visible (default, no cropping when content overflows); 2.hidden (overflow content is hidden, keeping the interface neat but information may be lost); 3.scroll (always display scroll bars, prompting the user to scroll); 4.auto (only display scroll bars when overflows, most commonly used). When using it, you need to pay attention to the layout environment, white-space settings and mobile compatibility. Reasonable application can improve the interface control effect.
    CSS Tutorial . Web Front-end 328 2025-07-22 02:23:12
  • What is the initial value of a CSS property?
    What is the initial value of a CSS property?
    InCSS,"initialvalue"referstothedefaultvalueapropertytakeswhennostylesareappliedorinherited.1.ItisdefinedbytheCSSspecificationforeachproperty.2.Examplesincludemargin:0,padding:0,andcolor:#000.3.Notallpropertiesareinherited,sonon-inheritedpro
    CSS Tutorial . Web Front-end 415 2025-07-22 02:14:21
  • Difference between `grid-template-columns` and `grid-auto-columns`?
    Difference between `grid-template-columns` and `grid-auto-columns`?
    Thecoredifferenceisthatgrid-template-columnsdefinesexplicitlysetcolumnsinthelayout,whilegrid-auto-columnscontrolsimplicitlycreatedcolumnswhenneeded.grid-template-columnssetsuptheexactnumberandsizeofcolumnsyoudefine,suchas200px,1fr,2fr,creatingafixeds
    CSS Tutorial . Web Front-end 892 2025-07-22 02:09:21
  • How to create a card layout with CSS
    How to create a card layout with CSS
    The key to creating a card layout with CSS is to have clear structure and reasonable style. A common practice is to combine HTML semantic tags with Flexbox or Grid layouts. 1. The infrastructure uses semantic labels such as, etc. to build a card content framework. 2. Style design controls the appearance and spacing of the card by setting width, inner margins, borders, background colors, shadows and flex layouts. 3. Multi-card arrangement can be used to implement responsive line breaking layouts using Flexbox, or Grid can implement fixed column number layouts, which can automatically adapt to different screen widths. 4. Detail processing includes maintaining the proportion of the picture, enhancing interaction with hovering effect, and restricting text content to avoid layout confusion.
    CSS Tutorial . Web Front-end 835 2025-07-22 02:06:21
  • What is the CSS ch unit and when to use it?
    What is the CSS ch unit and when to use it?
    The ch unit in CSS represents "character unit", which represents the width of the character "0" in the current font. It is mainly suitable for width layouts based on text size, such as setting the input box width to suit a specific number of characters, creating responsive UI components that are visually aligned with the character width, ensuring that each character is arranged neatly in a code editor or preformatted text block; it performs best in monospace fonts, with 1ch equaling the width of any single character; but in proportional fonts, due to the different widths of each character, it may not be able to accurately align.
    CSS Tutorial . Web Front-end 705 2025-07-22 01:51:40
  • When to use `vw` and `vh` units in CSS?
    When to use `vw` and `vh` units in CSS?
    UsevwandvhunitsinCSSforresponsivelayouts.1vwequals1%oftheviewportwidth,and1vhequals1%oftheviewportheight.Usevwforscalingwidthsandfontsizesbasedonscreenwidth,suchasherotextorcontainerwidths.Usevhforverticalspacingandfull-screensectionslikelandingpages
    CSS Tutorial . Web Front-end 931 2025-07-22 01:37:20
  • What is the currentColor keyword in CSS?
    What is the currentColor keyword in CSS?
    CurrentColor is a practical keyword in CSS that references the current text color of an element as the value of other attributes. It makes the code more concise and maintains style consistency by avoiding duplicate color values. Common uses include: 1. SVG icon fill and stroke; 2. Borders matching text color; 3. Background consistent with text color; 4. Link underline or focus outline. It works by directly inheriting the color attribute value of the element and searching up with the DOM tree until the color definition is found. When using it, you should pay attention to: 1. Complex multi-level components may cause color dependence chaos; 2. It is not suitable to use it when strictly distinguishing text and interface colors; 3. Old browsers such as IE11 have limited support. Overall, for old rings without deep compatibility
    CSS Tutorial . Web Front-end 330 2025-07-22 01:21:41
  • What is the difference between `initial`, `inherit`, `unset`, and `revert` keywords?
    What is the difference between `initial`, `inherit`, `unset`, and `revert` keywords?
    initial resets the attribute to the default value defined by the CSS specification, such as margin:initial reset to 0; inherit makes the attribute inherit the calculated value of the parent element, such as color:inherit lets the child element inherit the parent color; unset intelligently chooses inheritance or reset based on whether the attribute is inherited by default, such as color:unset may inherit the parent while border:unset resets; revert falls back to the browser's default style, such as background-color:revert restores the default white background. These keywords are used for style control and reset in different scenarios.
    CSS Tutorial . Web Front-end 569 2025-07-22 01:16:01
  • What is the `empty-cells` property?
    What is the `empty-cells` property?
    Theempty-cellspropertyinCSScontrolsthedisplayofbordersandbackgroundsinemptytablecells.Bydefault,browsershidetheseelementsinemptycells(or),butusingempty-cells:show;ensurestheyremainvisible,maintainingvisualstructure.1.Itacceptstwovalues:showtodisplayb
    CSS Tutorial . Web Front-end 383 2025-07-22 01:15:01

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