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  • How to stop CSS animations from running on page load?
    How to stop CSS animations from running on page load?
    To control CSS animations not to automatically play when the page is loaded, there are three methods to do so. 1. Use animation-play-state:paused to pause the animation, and then use JavaScript to start with .style.animationPlayState='running'; 2. Set a huge animation-delay value (such as 9999s) to delay playback, and use JS to set it to 0 seconds to trigger; 3. No animation classes are added at the beginning, and dynamically add an animation class through JS to control the playback timing.
    CSS Tutorial . Web Front-end 1004 2025-07-25 03:51:31
  • css responsive image examples
    css responsive image examples
    Responsive pictures can be implemented in five ways: 1. Use max-width:100% and height:auto to ensure that the picture is scaled in the container and maintains the aspect ratio; 2. Use object-fit to control the image filling method, cover crop filling and contain complete display; 3. Use srcset and sizes attributes to load the appropriate pictures according to the device to improve performance; 4. Use background-size:cover to realize the responsiveness of decorative background images; 5. Use Flexbox or Grid layout to create a responsive picture grid, which automatically adapts to different screen sizes. Each method is suitable for different scenarios and needs to be paid attention to details such as height:auto to prevent deformation.
    CSS Tutorial . Web Front-end 391 2025-07-25 03:38:01
  • CSS selector performance best practices
    CSS selector performance best practices
    CSSselectorperformancemattersonlargesitesbecauseinefficientselectorscanslowrenderingandincreaseloadtimes;1.Keepselectorsshortandsimplebyusingdirectclasseslike.nav-link:hoverinsteadoflongchainslikebodydiv#headerul.navlia:hovertoreducematchingtime;2.Us
    CSS Tutorial . Web Front-end 173 2025-07-25 03:37:20
  • What is CSS-in-JS and why would I use it?
    What is CSS-in-JS and why would I use it?
    CSS-in-JS is a development model for writing CSS styles in JavaScript, with the core of which is to encapsulate styles and component logic together. It defines styles through objects or template strings, and dynamically generates style tag insertion pages at runtime, thereby avoiding style conflicts and improving component development efficiency. 1. It makes component development more natural, styles coexist with components, without switching files; 2. Support dynamic styles, and can adjust styles in real time according to state changes; 3. Automatically add unique class names to effectively avoid style conflicts; 4. Most libraries do not require additional construction configurations and are used out of the box. Mainstream libraries include styled-components, emotion and goober, which are suitable for different project needs. However,
    CSS Tutorial . Web Front-end 499 2025-07-25 03:35:02
  • How to create a pure CSS parallax scrolling effect?
    How to create a pure CSS parallax scrolling effect?
    Pure CSS can achieve parallax scrolling effect, mainly through background-attachment:fixed and hierarchical structure. 1. Use the background-attachment:fixed attribute to make the background image fixed, and use the background-size and background-position to realize a full-screen background, forming a visual illusion that the background is still when scrolling. 2. Create multiple blocks with different backgrounds through layered layout. Each block applies the same fixed background attribute, so that they are rendered in turn when scrolling, sandwiched between ordinary content to form multiple layers of parallax. 3. Pay attention to mobile compatibility issues, and browsers such as iOSSafari may
    CSS Tutorial . Web Front-end 905 2025-07-25 03:33:10
  • What are CSS container queries
    What are CSS container queries
    CSScontainerqueries allows the style of internal elements according to the container size, solving the limitations of traditional media queries. 1. Define container types through container-type, such as inline-size, size or normal; 2. Use @container rules to write responsive styles, supporting conditions such as min-width, max-width, etc.; 3. The container can be named through container-name to avoid conflicts; 4. Pay attention to the independence of nested containers and browser compatibility issues. It is more suitable for component development and improves the maintainability and flexibility of styles.
    CSS Tutorial . Web Front-end 787 2025-07-25 03:20:21
  • The `nomodule` Attribute for JavaScript Modules
    The `nomodule` Attribute for JavaScript Modules
    Nomodule is a boolean property of the tag, used to be compatible with old browsers that do not support ESModules. Its function is: the browser that supports module ignores scripts with nomodule, and loads it if it is not supported. This provides different code paths for different browsers. For example:. The actual usage scenarios include modular development and fallback packaged versions, lazy loading of polyfills. Note when using it: if you do not need to be compatible with old browsers, you do not need to use it, ensure that fallback code is compatible, test fallback validity, and avoid script conflicts.
    HTML Tutorial . Web Front-end 610 2025-07-25 03:18:32
  • What creates a stacking context in CSS?
    What creates a stacking context in CSS?
    The cascaded context is triggered by multiple CSS attributes. Common methods include setting position z-index and opacity.
    CSS Tutorial . Web Front-end 673 2025-07-25 03:08:41
  • HTML `type` Attribute for Script and Style Tags
    HTML `type` Attribute for Script and Style Tags
    And tags require a type attribute to tell the browser how to handle the content. 1. The type attribute specifies script or style language types, such as text/javascript (default) or text/css (default). 2. When using ES6 module, you need to set type="module". 3. Non-standard languages (such as SCSS, TypeScript) need to be combined with construction tools and explicitly set the type. 4. For special purposes, use application/json for storage of data. 5. Types can be omitted in ordinary development, but they must be set correctly in modular or experimental projects.
    HTML Tutorial . Web Front-end 444 2025-07-25 03:07:42
  • A Primer on HTML Elements and Attributes
    A Primer on HTML Elements and Attributes
    HTML elements and attributes are the basis of web page structure. 1. Elements define content structure through tags, such as title, paragraph, link, and content grouping; 2. Attributes provide additional information, such as href specifies link address, src specifies image or script source, class and id are used for style and script operations, alt improves accessibility and SEO; 3. When using it, pay attention to the matching between elements and attributes, such as href only applies to or; 4. Common errors include unclosing tags, misuse of attribute names or values, nesting block-level elements in in-line elements, and using outdated tags such as OR. Proper use of HTML elements and attributes helps build a complete and semantic web page.
    HTML Tutorial . Web Front-end 293 2025-07-25 03:07:21
  • HTML `nofollow` Attribute for Links
    HTML `nofollow` Attribute for Links
    nofollow is an attribute in HTML that controls whether search engines track links. Its function is to prevent weight transfer or crawlers from crawling target pages. Common usage scenarios include: 1. Links in user-generated content; 2. Advertising or sponsored links; 3. Links from untrusted sources; 4. Internal functional links. In addition, there are also a variety of rel attribute variants, such as nofollownoopener, sponsored, ugc and noreferrer, which can be used to express link intentions more accurately. It should be noted that nofollow does not completely prevent search engines from crawling pages, and should not be abused to avoid affecting normal recommendations. Rational use of nofollow helps optimize website structure and improve SEO results
    HTML Tutorial . Web Front-end 583 2025-07-25 03:06:22
  • HTML `body` Tag: Main Content Container Explained
    HTML `body` Tag: Main Content Container Explained
    The main content of the web page is placed in the HTML body tag. 1. The body tag is the main container of web page content, containing all user-visible and interactive elements, such as text, pictures, buttons, links and videos, etc.; 2. It is located inside the html tag, and usually after the head tag, the browser only renders the content in the body; 3. The body tag is crucial for SEO optimization, page layout and interaction functions, and all interactive elements must be placed in it; 4. Correct use of body tags includes ensuring that there is only one body in the document, avoiding placing content outside the body, and using semantic tags to enhance structural clarity; 5. Body is also used to set the global style of the page, such as background, font, margin, etc., which is the core of web page design and development.
    HTML Tutorial . Web Front-end 671 2025-07-25 03:05:41
  • How to align the last item in a flex container?
    How to align the last item in a flex container?
    Usemargin-left:autoonthelastitemtopushittotherightinahorizontalflexcontainer.2.Applyjustify-content:space-betweentoalignthefirstitemleftandthelastitemright.3.Insertaflex-growspacerelementbeforethelastitemformorecontrol.4.Usealign-self:flex-endforvert
    CSS Tutorial . Web Front-end 282 2025-07-25 03:03:41
  • CSS grid layout tutorial
    CSS grid layout tutorial
    CSSGrid layout implements a two-dimensional layout by defining container and row-column properties. 1. Set display:grid; create Grid container; 2. Use grid-template-columns and grid-template-rows to define the size of columns and rows, such as 200px1fr200px; 3. Use grid-column and grid-row to control the position of child elements, such as 1/span2 to span two columns; 4. Use gap to set the spacing, justify-items and align-items to control the alignment, thereby achieving flexible and complex page layout.
    CSS Tutorial . Web Front-end 555 2025-07-25 03:03:20

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