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  • Describe the `border-image` property
    Describe the `border-image` property
    The border-image attribute creates borders through images to improve design flexibility. It includes source, slice, width, outset and repeat sub-attributes, and syntax is such as border-image:url(border.png)30round; when using it, you need to pay attention to setting the source and slice values usually do not have units, compatibility, and priority relationship with border-width; it is common in scenarios such as cards, buttons, and background image modification. For example, by .box{border:10pxsolidtransparent;border-image-source:url(frame.png)
    CSS Tutorial . Web Front-end 693 2025-07-16 02:42:30
  • Compare Flexbox and Grid for different layout needs
    Compare Flexbox and Grid for different layout needs
    Flexbox is suitable for one-dimensional layout, while Grid is suitable for two-dimensional layout. To decide which tool to use, please make judgments based on the following key points: 1. If you only need to align elements along rows or columns (such as navigation bars, forms, and list cards), use Flexbox, which features include spacing control (gap), alignment (justify-content, align-items) and automatic scaling items; 2. If you need to control the complex structure of rows and columns at the same time (such as page layout, dashboard, and picture gallery), use Grid, which supports defining row-template-columns/rows, region naming (grid-template-areas) and precise placement of elements;
    CSS Tutorial . Web Front-end 832 2025-07-16 02:22:10
  • Explain CSS Blend Modes
    Explain CSS Blend Modes
    CSSBlendModes is a tool that creates rich visual effects by mixing elements with content below it. Common patterns include multiply, screen, and overlay. They control the blending of elements with other content through mix-blend-mode, or the blending between background layers through background-blend-mode. When using it, you need to pay attention to performance, readability, browser compatibility and debugging difficulty. It is recommended to test simple colors first and then apply them to the project.
    CSS Tutorial . Web Front-end 883 2025-07-16 02:16:51
  • Explain the concept of specificity fighting
    Explain the concept of specificity fighting
    SpecificityconflictinCSSoccurswhenmultiplerulestargetthesameelement,andthebrowsermustdeterminewhichstyletoapply.Itusesascoringsystembasedonselectortypes:inlinestyles(1000),IDs(100),classes/attributes/pseudo-classes(10),andelements/pseudo-elements(1).
    CSS Tutorial . Web Front-end 553 2025-07-16 02:16:31
  • Explain the `text-overflow` property
    Explain the `text-overflow` property
    TohandletextoverflowinCSS,usethetext-overflowpropertywith1.white-space:nowrap,2.overflow:hidden,and3.adefinedwidthforsingle-linetruncation,wherecommonvaluesareclipandellipsis;formulti-linetruncation,apply-webkit-line-clampwithdisplay:-webkit-boxand-w
    CSS Tutorial . Web Front-end 256 2025-07-16 02:15:31
  • What is the `background-image` property used for?
    What is the `background-image` property used for?
    TheCSSbackground-imagepropertysetsanimageasthebackgroundofanelement.1.Usebackground-image:url('image.jpg')toapplyanimage.2.Combinewithbackground-repeattocontroltiling—useno-repeatforsingleimages,repeat-xorrepeat-yfordirectionaltiling.3.Applybackgroun
    CSS Tutorial . Web Front-end 853 2025-07-16 02:13:02
  • Describe the CSS Box Model including `box-sizing`
    Describe the CSS Box Model including `box-sizing`
    The function of box-sizing is to determine the width and height of HTML elements. The box model consists of content, padding, border, and margin. By default, width and height only act on the content area, and the actual total width is content padding2 border2. Use box-sizing:border-box; to make the width and height set include content, padding and border, making the layout more intuitive. It is recommended to use *{box-sizing:border-box;} to avoid size misalignment. In actual development
    CSS Tutorial . Web Front-end 867 2025-07-16 02:11:10
  • Describe the `word-break` and `word-wrap` properties
    Describe the `word-break` and `word-wrap` properties
    Word-break and overflow-wrap (formerly word-wrap) do differently when dealing with long words or unbreakable content. 1. Word-break controls how to break lines of words in block elements, break-all forces long words to break, keep-all avoids breaking, suitable for Chinese, Japanese and Korean texts. 2. Overflow-wrap disconnects long words when necessary to prevent overflow, break-word makes the context more intelligent. 3. In usage scenarios, use word-break:break-all for code, and use overflow-wrap:break-word for user comments. 4. Pay attention to differences in browser compatibility and different mobile behaviors
    CSS Tutorial . Web Front-end 956 2025-07-16 02:08:02
  • Explain the `border` shorthand property
    Explain the `border` shorthand property
    When using the border abbreviation attribute of CSS, you can set the width, style and color of the element border in one line of code at the same time. It contains three properties: border-width, border-style, border-color, and is usually written in this order, for example: border:2pxsolid#333; If one of these is omitted, the browser will use the default value, and if the color is not specified, the default text color will be used. Common border styles include solid (solid line), dashed (dashed line), dotted (dotted line), double (double line) and none (borderless). border-style must be set, otherwise
    CSS Tutorial . Web Front-end 662 2025-07-16 02:06:20
  • How do you create a sticky footer layout?
    How do you create a sticky footer layout?
    Sticky footer layouts can be easily implemented with Flexbox. First, set display:flex and flex-direction:column for the body, and set flex:1 for the main content area to fill the remaining space; at the same time, make sure that the body has min-height:100vh, so that the footer is always fixed to the bottom of the viewport when the content is insufficient; the HTML structure should clearly include three parts: header, main and footer to avoid additional wrapping elements interfering with the layout; common problems to note include not missing the min-height attribute, avoiding setting fixed heights for the header or footer, and checking the compatibility of nested flex projects, especially if IE1 is required.
    CSS Tutorial . Web Front-end 792 2025-07-16 02:05:21
  • What is the difference between `margin` and `padding`?
    What is the difference between `margin` and `padding`?
    In CSS, the main difference between margin and padding is that they affect different parts of the box model. 1. Margin controls the space outside the element border, which is used to adjust the distance between the element and other elements; 2. Padding controls the space inside the element border, which is used to adjust the distance between the content and the border. For example, setting .box{margin:20px;} creates an external space of 20px around the element, while setting .box{padding:15px;} gives 15px internal space between the content and the border. In use scenarios, if you want to separate blocks or center elements, use margin; if you want to add space or expand background area to the text inside the button, use p
    CSS Tutorial . Web Front-end 793 2025-07-16 02:03:41
  • How does the `float` property work and how do you clear floats?
    How does the `float` property work and how do you clear floats?
    The float attribute of CSS was originally designed to achieve the layout effect of text surrounding images, but was later widely used in page layout. float will cause elements to be separated from the document stream and arranged to the left or right, while other content surrounds it; multiple floating elements will be arranged horizontally as space allows, otherwise they will "drop" below. However, floating causes the parent container to collapse highly, which in turn causes release issues, so floating needs to be cleared. Common ways to clear floats include: 1. Add empty elements with clear:both after the floating element; 2. Use clearfix pseudo-element techniques; 3. Use modern layout methods such as Flexbox or Grid to replace float. Which method to choose depends on the project structure and browser
    CSS Tutorial . Web Front-end 234 2025-07-16 01:49:51
  • How to override inherited styles in CSS?
    How to override inherited styles in CSS?
    To override inherited CSS styles, the core approach is to increase the priority of custom styles. 1. You can add!important after the attribute (use with caution, only if necessary). 2. Improve selector specificity, such as using ID or adding class names. 3. Adjust the loading order of the style sheet and place the custom styles at the end to introduce them. 4. Use inline styles (non-regular use is not recommended), which has extremely high priority but is difficult to maintain. Using these techniques rationally can effectively resolve style conflict problems.
    CSS Tutorial . Web Front-end 844 2025-07-16 01:47:20
  • Compare `em` and `rem` units in CSS
    Compare `em` and `rem` units in CSS
    The core difference between rem and em is that the calculation benchmark is different. Rem is always based on the font size of the root element (usually) and is suitable for global consistency scenarios such as basic font size and layout spacing; while em is based on the font size of the recent parent element, suitable for internal use of components that require local scale scaling, such as button icons and form labels; using rem can avoid the size multiplication problem during nesting, and supports overall scaling by adjusting the root font size. When using em, you need to pay attention to the unexpected effects that may be caused by hierarchical overlay.
    CSS Tutorial . Web Front-end 558 2025-07-16 01:38:00

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