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- How to add padding and margin in CSS?
- Paddingcontrolsinnerspacing,margincontrolsouterspacing;bothusepixels,percentages,orems.Useindividualpropertiesorshorthandlikepadding:10px20pxormargin:0auto;forcentering.Verticalmarginscollapse,andsmalladjustmentsimprovelayoutclarity.
- CSS Tutorial . Web Front-end 237 2025-09-12 04:51:01
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- How to create a hamburger menu icon with CSS
- Yes, you can create hamburger menu icons with pure CSS, realize the visual effect of three horizontal lines through HTML structure and CSS style, and add animations to "X" close icons, and combine a small amount of JavaScript to achieve interaction. The whole process does not require pictures or frameworks, is highly compatible and loaded quickly.
- CSS Tutorial . Web Front-end 602 2025-09-12 04:06:01
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- How to use the focus pseudo-class in CSS?
- :focus style is used when elements gain focus, such as clicks, touches or keyboard navigation, to improve the accessibility and user experience of forms, buttons and links. It should avoid removing default outlines and use outline and outline-offset to provide visual feedback.
- CSS Tutorial . Web Front-end 318 2025-09-12 03:29:01
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- How to create a dropdown menu in CSS
- The key to creating a pure CSS drop-down menu is to use HTML structure to combine CSS's hover pseudo-class to achieve interaction; first, build a list structure in HTML that includes the main menu and the submenu, where the submenu is wrapped in the parent list item with a specific class; then set the main menu to horizontally arrange and hide the submenu through CSS. The specific steps are: 1. Use display:none to hide the submenu corresponding to the .dropdown-content class; 2. Set position:relative for the parent .dropdown elements to ensure the positioning benchmark; 3. Use position:absolute, top:100% and left:0 to achieve precise positioning; 4.
- CSS Tutorial . Web Front-end 184 2025-09-12 02:52:01
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- How to select an element that has a specific class in CSS?
- ToselectaclassinCSS,useaperiodfollowedbytheclassname,like.highlight{background-color:yellow;},whichtargetsallelementswithclass="highlight".
- CSS Tutorial . Web Front-end 695 2025-09-12 00:51:00
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- How to horizontally center an image in CSS?
- Tocenteranimagehorizontally,useautomarginsonablock-levelimage:setdisplay:blockandmargin-left/righttoauto.2.Forinlineimages,applytext-align:centertotheparentcontainer.3.Formodernlayouts,usedisplay:flexwithjustify-content:centerontheparent.Eachmethodsu
- CSS Tutorial . Web Front-end 370 2025-09-12 00:08:01
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- How to handle image aspect ratio in CSS?
- UseCSSaspect-ratioandobject-fittomaintainimageproportionsresponsively;fallbacktopadding-bottomtechniqueforolderbrowsers,ensuringnodistortionwithmax-width:100%andheight:auto.
- CSS Tutorial . Web Front-end 929 2025-09-11 13:03:01
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- How to style a checkbox in CSS
- Hide the default checkbox and create custom styles through CSS pseudo-elements; 2. Use opacity:0 and position:absolute to keep the checkbox function hidden at the same time; 3. Use the ~ selector to change the custom style when selected; 4. Add::after pseudo-element to display checkmarks; 5. Ensure label association inputs to ensure accessibility; 6. Optionally add hover and focus states to improve interactive experience. This method is highly compatible and easy to maintain.
- CSS Tutorial . Web Front-end 372 2025-09-11 12:32:01
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- How to use CSS variables (custom properties)?
- To define CSS variables, you need to use the --prefix and usually declare in:root, such as --primary-color:#007bff; 2. Reference variables through the var() function, supporting setting of alternate values, such as var(--text-color, black); 3. You can update variables dynamically through JavaScript or media queries to achieve topic switching or responsive adjustments; 4. It is recommended to use semantic naming, unify specifications, and avoid duplicate definitions to improve maintenance and readability.
- CSS Tutorial . Web Front-end 672 2025-09-11 11:48:01
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- How to create a full width container in CSS
- To create a full width container, you need to reset the default margins of body and html, and set width:100% or 100vw; 1. Use width:100% to make the container as wide as its parent element, or use width:100vw to make it span the entire viewport width; 2. Reset the margin and padding of body and html to 0 to avoid the default style limiting width; 3. If you need a full width background but the content is centered, you can nest the container, set the outer layer to full width, and set max-width and margin:0auto in the inner layer; 4. In the Flex or Grid layout, make sure that the parent container does not constrain the width of the child element, and you can adjust the negative margins through calc() to achieve full width visually; 5. Always
- CSS Tutorial . Web Front-end 321 2025-09-11 10:03:01
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- How to create a parallax scrolling effect on a background image with CSS?
- Use the background-attachment:fixed property of CSS to create a background parallax scrolling effect without JavaScript. 1. Apply background-attachment:fixed to containers containing background images, so that the background images are fixed and the content is scrolled, creating a sense of parallax; 2. HTML only requires a div container with class name; 3. This effect is achieved by "sticking" the viewport and scrolling of contents. Modern browsers generally support it and have good performance; 4. Optional optimizations include adding translucent pseudo-element masks to improve text readability, and ensuring that the text is above the mask through z-index, or using multiple blocks of different pictures to create multi-layer parallax; 5. Pay attention to it
- CSS Tutorial . Web Front-end 731 2025-09-11 09:57:01
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- How to apply a blur filter to a background in CSS?
- Use pseudo-element combined with filter:blur() to achieve background blur. Copy the background through ::before and apply the blur effect, with the content layer placed above; or use backdrop-filter to achieve the frosted glass effect, which is suitable for transparent containers. Pay attention to Safari compatibility and performance impact.
- CSS Tutorial . Web Front-end 268 2025-09-11 09:52:00
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- How to create an image overlay effect on hover in CSS?
- Use CSS pseudo-elements to create a hover image overlay effect, enabling smooth transitions through positioning and transparency. 1. Wrap the image in a container and set it to relative positioning; 2. Use ::before to add a translucent mask, which is hidden by default; 3. Set opacity to 1 when hovering to display the mask; 4. Optional::after adds Chinese text and fade in synchronously.
- CSS Tutorial . Web Front-end 838 2025-09-11 09:23:01
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- How to use the ::before and ::after pseudo-elements in CSS?
- The ::before and ::after pseudo-elements are inserted before and after the elements through the content attribute of CSS. They are used to add decorative elements such as quotes, icons, tags, etc. without changing the HTML structure. Content must be set to take effect. It is often used to coordinate positioning to achieve visual effects.
- CSS Tutorial . Web Front-end 718 2025-09-10 05:22:01
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