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- How to create a simple modal/popup with CSS only?
- How to use pure CSS to control pop-up display and hide? The core method is to use anchor point (#) links to cooperate with the :target pseudo-class to control element state. 1. When clicking to open the link, the URL becomes #popup, triggering the .modal:target style to display the pop-up window; 2. The close button jumps to the #anchor point, causing the URL to return to the targetless state, and hiding the pop-up window. The pop-up content is centered and beautified. The absolute positioning and transformation can be used to achieve centering, adding background masks, rounded borders, shadows and other styles. Limitations include: 1. Unable to monitor external area closures; 2. No animation transitions are supported; 3. Weak SEO and barrier-free experiences. Suitable for static display pop-ups without loading additional scripts.
- CSS Tutorial . Web Front-end 330 2025-07-19 03:21:31
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- How to create a dark mode toggle with CSS
- The key to implementing dark mode switching on web pages lies in HTML structure, CSS style separation, JavaScript control class names and persistent storage. First, add button elements: toggle dark mode; second, define the body default style and .dark-mode class style in CSS; then, listen to the button click event with JavaScript and switch the class name: document.body.classList.toggle('dark-mode'); then, use localStorage to save user preferences, read the status when the page is loaded and restore the corresponding mode; finally, you can automatically detect system preferences and prioritize user storage settings. These steps allow for complete darkness
- CSS Tutorial . Web Front-end 163 2025-07-19 03:20:50
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- Explain the different CSS positioning schemes: static, relative, absolute, fixed, sticky
- There are five ways to locate CSS: static, relative, absolute, fixed and sticky. static is the default positioning, following the document flow and does not support offset; relative moves relative to its original position and is still in the document flow; absolute is separated from the document flow, and is positioned relative to the nearest non-static positioning and ancestor positioning; fixed relative to the browser window, and is often used to fix the navigation bar; sticky is between relative and fixed, scrolling to a specific position and fixed, suitable for sticky heads. Mastering their behavioral differences is key to layout.
- CSS Tutorial . Web Front-end 676 2025-07-19 03:19:20
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- How to style the first letter or first line of a paragraph?
- To beautify the beginning of a paragraph to enhance visual appeal, a common practice is to use pseudo-elements of CSS or manually style the document. In web development, p::first-letter can be used to set the first letter style, such as enlarging, bolding, and discoloring, but it should be noted that it is only suitable for block-level elements; if you want to highlight the entire first line, use p::first-line to add styles; in document software such as Word, you can manually adjust the first letter format or create style templates, and InDesign has a built-in "first-sinking" function suitable for publishing and design; when applying, you need to pay attention to details, such as avoiding complex styles affecting reading and ensuring compatibility and format consistency.
- CSS Tutorial . Web Front-end 1053 2025-07-19 02:58:31
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- How to use CSS `filter` effects?
- The CSS filter effect can adjust the appearance of web page elements through a line of code, and supports blur, grayscale, brightness and other effects. Pay attention to the syntax structure and browser compatibility when using it. Its basic syntax is to call functions such as grayscale(), blur(), brightness(), etc. through filter attributes, and can be used superimposedly, such as "filter:grayscale(30%)brightness(80%)blur(2px);". Applicable scenarios include background blur, disabled status identification, screen adaptation color adjustment and creative color transformation, and dynamic effects can be achieved through the:hover pseudo-class. In terms of browsers, modern browsers generally support it, but older versions may require prefixes, and attention should be paid to
- CSS Tutorial . Web Front-end 926 2025-07-19 02:56:31
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- How to make an image responsive with CSS
- To make the image automatically resize and maintain proportion on different devices, it can be achieved through the following methods: 1. Set max-width:100% and height:auto to make the image scale and maintain proportion according to the container width; 2. Use object-fit to control the image filling method, such as cover cropping excess parts, contain complete display, and fill forcibly fill; 3. Provide multi-resolution image resources with srcset to improve loading performance and display quality; 4. Ensure that the image container is set to a reasonable width or use elastic layout to ensure responsive effects.
- CSS Tutorial . Web Front-end 460 2025-07-19 02:45:01
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- What is the aspect-ratio property in CSS?
- TheCSSaspect-ratiopropertyallowsdeveloperstodefinethewidth-to-heightratioofanelement,ensuringitmaintainsaspecificshapeacrossdifferentscreensizes.1.Itsimplifiesmaintainingproportionswithouthackslikepaddingtricks.2.Usageinvolvessettingaratiosuchas16/9o
- CSS Tutorial . Web Front-end 462 2025-07-19 02:44:01
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- Explain the difference between `auto` and `0` margin
- margin:auto is used to horizontally center block-level elements, the width needs to be set and the left and right margins are set to auto; margin:0 is used to clear all margins of the element. 1.margin:auto achieves horizontal centering by automatically calculating left and right margins, which is suitable for block-level elements with fixed width; 2.margin:0 resets the default margin of the element, which is often used in cases where the default spacing needs to be cleared, such as titles or lists; 3. When using it, please note that margin:auto does not support vertical centering, which only affects the horizontal direction by default, and cannot be used for inline elements, while margin:0 is suitable for all scenarios where margins need to be cleared.
- CSS Tutorial . Web Front-end 538 2025-07-19 02:32:12
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- How to disable text selection with CSS
- To prevent users from selecting text, the most direct way is to use the user-select attribute of CSS; 1. Set user-select:none to disable text selection of specified elements; 2. This style can be applied to specific classes or HTML tags to achieve local or global control; 3. Be careful not to affect the default behavior of form elements such as input boxes to avoid misuse and affect user experience; 4. The mobile side may still support long pressing and selecting or pop-up menus, and compatibility needs special attention; 5. It is not recommended to use this function excessively to avoid affecting normal interactions. If stricter control is required, selectstart events can be blocked in combination with JavaScript, but content copying cannot be completely prevented.
- CSS Tutorial . Web Front-end 963 2025-07-19 02:29:50
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- Explain the different values of the CSS `position` property
- The CSSposition attribute has five main values, which control how elements are positioned in the web page. 1.static is the default behavior, and elements follow document flow and ignore attributes such as top and bottom; 2. Relative allows relative movement without leaving the document flow, retaining the original placeholder space; 3. Absolute causes elements to be separated from the document flow and positioned based on recent positioning ancestor elements; 4. Fixed is similar to absolute but always based on browser window positioning, keeping the position unchanged when scrolling; 5. Sticky is a blending mode, which appears to be relative before scrolling to a specific position, and then fixed to the viewport, suitable for sticky headers or sidebars.
- CSS Tutorial . Web Front-end 294 2025-07-19 02:22:01
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- What is the CSS `overflow` property and its values?
- TheCSSoverflowpropertycontrolshowcontentbehaveswhenitexceedsanelement'sbox.1.overflow:visibleshowsallcontent,evenifitoverflows.2.overflow:hiddenclipsoverflowingcontentandhidesit.3.overflow:scrolladdsscrollbarstohandleoverflow,regardlessofcontentsize.
- CSS Tutorial . Web Front-end 713 2025-07-19 02:20:21
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- How to create a checkerboard pattern with CSS?
- To implement checkerboard pattern, two methods can be used for CSS. 1. Use background-image to combine linear-gradient to create a background checkerboard. The grid size is controlled by setting background-size, which is suitable for background images; 2. Use HTML structure to match Flex or Grid layout, and set different background colors through parity selectors, which is suitable for scenes where each grid needs to be independently controlled. In addition, attention should be paid to color comparison, responsive adaptation and performance optimization. The two methods have their own advantages and can be flexibly selected according to needs.
- CSS Tutorial . Web Front-end 636 2025-07-19 02:19:41
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- Why is my CSS not working
- CSSnotworking is usually caused by several common problems. 1. Check for syntax errors, such as missing semicolons or spelling errors, and make sure the brackets match; 2. Make sure the CSS file path is correct and the HTML is correctly referenced; 3. Resolve specific conflicts, such as selector priority or !important override; 4. Clear the browser cache, try hard refreshing or disabling the cache to load the latest styles. Using developer tools to gradually troubleshoot can effectively locate the root cause of the problem.
- CSS Tutorial . Web Front-end 664 2025-07-19 02:18:20
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- Describe the difference between `==` and `===` in JavaScript (Oops, wrong language - stick to CSS)
- There are no == or == operators in CSS, they belong to programming languages such as JavaScript. CSS uses selectors and properties to apply styles, rather than comparisons or evaluations. 1. The attribute selector [attr=value] is used for exact matches, similar to strict matches ===; 2. Use ~=, |=, ^=, $=, *=, etc. to achieve partial or fuzzy matches, similar to the behavior of loose matches ==. Choose the right matching method according to your needs to ensure accuracy and performance.
- CSS Tutorial . Web Front-end 768 2025-07-19 02:15:01
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