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- What is the viewport meta tag and why is it important?
- Theviewportmetatagisessentialformobilewebsiteoptimization.Itcontrolspagedimensionsandscalingonmobiledevices,ensuringcontentdisplayscorrectlywithoutforcedzooming.Withoutit,browsersdefaulttodesktoprendering,makingsiteshardtoreadornavigate.Apropersetupu
- CSS Tutorial . Web Front-end 471 2025-06-24 00:39:30
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- What is the Critical Rendering Path and how does CSS affect it?
- Critical rendering path (CRP) is the core process for the browser to render a page for the first time, which directly affects the loading speed. It includes six steps: parsing HTML to build a DOM tree, parsing CSS to build a CSSOM tree, generating a rendering tree, layout, drawing and compositing layers. CSS plays a key role in it. Because of its blocking rendering characteristics, it must wait until the CSSOM is completed before the subsequent process can be continued. Optimizing CSS can improve CRP performance by streamlining key CSS and inlining, splitting compressed files, separating styles with media queries, avoiding complex selectors, etc., thereby speeding up the first-screen loading speed.
- CSS Tutorial . Web Front-end 982 2025-06-24 00:39:10
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- @keyframes for professional web design
- @keyframesareessentialinprofessionalwebdesignforcreatingdynamicandengaginguserinterfaces.Theyenhanceuserexperience,guideattention,andimproveperformancebyoffloadinganimationworkfromJavaScripttoCSS.Touse@keyframeseffectively:1)Chooseappropriatetimingan
- CSS Tutorial . Web Front-end 506 2025-06-24 00:37:31
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- What is the scroll-snap-type property for?
- scroll-snap-type is used to control the rolling adsorption behavior of elements in the container, and to achieve precise control of the rolling position by setting the axial direction and stringency. 1. Commonly used for layouts such as full-screen sliders, horizontal carousel diagrams, vertical timelines, etc.; 2. It is necessary to use scroll-snap-align of sub-elements, such as setting .container{scroll-snap-type:ymandatory} and .section{scroll-snap-align:start}; 3. The axial value x/y/block determines the scroll direction, and the strictness value mandatory/proximity determines the adsorption intensity; 4. Common errors include not setting sub-
- CSS Tutorial . Web Front-end 719 2025-06-24 00:37:01
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- What are the three ways to insert CSS into a webpage?
- There are three ways to insert web pages in CSS: 1. Inline styles are suitable for single element modification or debugging, but are not conducive to maintenance and reuse; 2. Internal style sheets are suitable for small projects or test pages, and the current page style is unified but cannot be shared across pages; 3. External style sheets are most recommended, suitable for multi-page projects, centrally manage styles, improve maintenance and loading speed. In actual development, external style sheets are preferred, and the other two methods are considered in special circumstances.
- CSS Tutorial . Web Front-end 592 2025-06-24 00:36:20
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- What is the animation-fill-mode property for?
- The animation-fill-mode attribute is used to control the element style representation before and after the animation starts, and it contains four values: none, forwards, backwards and both. none is the default value, and the elements return to the original style after the animation is over; forwards keep the last frame style after the animation is over; backwards applies the first frame style during the animation delay; both combine the effects of both. This property is suitable for scenes where animations need to be maintained, such as menu slide in, loading instructions, etc., and can be used in combination with animation-delay and animation-direction to take effect in non-infinite repeat animations. Use the genus correctly
- CSS Tutorial . Web Front-end 591 2025-06-24 00:35:01
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- What is CSS containment (contain property)?
- CSScontainmentimprovesperformancebyisolatingelementstolimitbrowserrecalculations.1.Thecontainpropertyenablesdeveloperstospecifyhowisolatedanelementisfromtherestofthepage.2.Valueslikesize,layout,paint,andstyleofferdifferentlevelsofcontainment.3.strict
- CSS Tutorial . Web Front-end 184 2025-06-24 00:34:01
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- Is it possible to use flexbox and grid together?
- Yes,youcanuseflexboxandgridtogethertoenhancelayoutcapabilities.1)Usegridfortheoverallstructure,likedividingthepageintosections.2)Useflexboxwithinthesesectionsforfine-tuningalignmentandspacingofelements.Thiscombinationoffersflexibility,responsiveness,
- CSS Tutorial . Web Front-end 178 2025-06-24 00:29:40
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- What are container queries and how do they differ from media queries?
- Containerqueriesallowstylingelementsbasedontheircontainer'ssize,unlikemediaqueriesthatrelyontheviewport.1.Mediaqueriestargettheviewportandareidealforgloballayoutchangesbutlackcontroloverindividualcomponentsindifferentlayouts.2.Containerqueriestargeta
- CSS Tutorial . Web Front-end 277 2025-06-24 00:26:40
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- What is the CSS object-fit property for images and videos?
- Theobject-fitCSSpropertycontrolshowimagesorvideosscalewithintheircontainer.1.fillstretchesmediatofit,possiblydistortingit.2.containscalesmediatofitentirelywithinthecontainerwhilepreservingaspectratio.3.coverscalesmediatocovertheentirecontainer,croppi
- CSS Tutorial . Web Front-end 1068 2025-06-24 00:25:41
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- What is the difference between a CSS transition and a CSS animation?
- CSS transitions are suitable for simple state changes, while CSS animations are used for complex effects. 1. The transition only supports start and end states, which are suitable for simple interactions such as button hovering; 2. The animation provides complete control through keyframes, suitable for scenes with looping playback or precise timing; 3. Both should be given priority to use opacity and transform attributes for best performance; 4. It should be selected according to needs to avoid unnecessary animations distracting users.
- CSS Tutorial . Web Front-end 516 2025-06-24 00:24:11
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- What does the animation-direction property do (e.g., alternate)?
- Theanimation-directionpropertyinCSScontrolsthedirectionofananimationacrosscycles,offeringfourvalues:1.normalplaystheanimationforwardeachtime,2.reverseplaysitbackward,3.alternatereversesdirectiononeverycyclestartingforward,and4.alternate-reversestarts
- CSS Tutorial . Web Front-end 537 2025-06-24 00:23:51
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- What do the flex-grow, flex-shrink, and flex-basis properties do?
- In a Flexbox layout, flex-grow, flex-shrink, and flex-basis are the three core attributes that control the behavior of child elements. 1.flex-grow determines how much the element can expand when there is extra space, and the larger the value, the larger the proportion; 2.flex-shrink determines the proportion of element shrinkage when there is insufficient space, and the larger the value, the more shrinkage; 3.flex-basis is the initial size of an element before it is stretched and can be set to a fixed value or percentage. They are usually set together by flex abbreviation properties. For example, flex:11200px means that equal proportion expansion and shrinkage are allowed, and adjusted from 200px as the starting point, thereby achieving a flexible and controllable layout effect.
- CSS Tutorial . Web Front-end 196 2025-06-24 00:20:30
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- How can you style scrollbars in CSS?
- Yes,youcanstylescrollbarsinCSS,butthelevelofcontrolvariesbybrowser.TocustomizescrollbarsforapolishedUI,use::-webkit-scrollbarpseudo-elementsforWebKitbrowsers(Chrome,Edge,Safari),allowingfullcustomizationlikecolors,sizes,andhovereffects.ForFirefox,app
- CSS Tutorial . Web Front-end 818 2025-06-24 00:18:22
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