What are the common problems with CSS selectors?

To change the CSS list style, first use list-style-type to change the bullet or numbering style. 1. Use list-style-type to set the bullet of ul to disc, circle or square, and the number of ol is decimal, lower-alpha, upper-alpha, lower-roman or upper-roman. 2. Remove the tag completely with list-style:none. 3. Use list-style-image:url('bullet.png') to replace it with a custom image. 4. Use list-style-position:in

Use CSS to create dotted borders, just set the border attribute to dotted. For example, "border:3pxdotted#000" can add a 3-pixel-wide black dot border to the element. By adjusting the border-width, the size of the point can be changed. The wider borders produce larger points. You can set dotted borders for a certain side, such as "border-top:2pxdottedred". Dotted borders are suitable for block-level elements such as div and input. They are often used in focus states or editable areas to improve accessibility. Pay attention to color contrast. At the same time, different from dashed's short-line style, dotted presents a circular dot shape. This feature is widely used in all mainstream browsers.

It is feasible to create a responsive automatic carousel slider with pure CSS, just combine HTML structure, Flexbox layout, and CSS animation. 2. First build a semantic HTML container containing multiple recommendation terms, each .item contains reference content and author information. 3. Use the parent container to set display:flex, width:300% (three slides) and apply overflow:hidden to achieve horizontal arrangement. 4. Use @keyframes to define a translateX transformation from 0% to -100%, and combine animation: scroll15slinearinfinite to achieve seamless automatic scrolling. 5. Add media

:nth-child() is used to select and style the elements according to the position of the elements in the same level, and is often used to create alternating styles or specific modes; 1. Use the even and odd keywords to achieve interlaced color changes, such as li:nth-child(even) to set the background of even items to light gray; 2. Use the an b formula to accurately control the selection rules, such as 3n 1 to select items 1, 4, 7, etc.; 3. Special modes such as -n 3 to select the first 3 child elements; 4. Note that nth-child counts from 1 and calculates all elements of the same level. If you need to count only by the same element, use nth-of-type().

Usebuilt-incursortypeslikepointer,help,ornot-allowedtoprovideimmediatevisualfeedbackfordifferentinteractiveelements.2.ApplycustomcursorimageswiththecursorpropertyusingaURL,optionallyspecifyingahotspotandalwaysincludingafallbacklikeautoorpointer.3.Fol

Using CSS to create a split screen layout can be implemented through Flexbox. First, set the container to display:flex and set the height to 100vh. Use flex:1 to divide the space evenly. The horizontal layout is only possible by default. Vertical layout needs to be set flex-direction:column. In conjunction with media query @media(max-width:768px) can achieve the mobile stacking responsive effect. If you need to fix the sidebar, set a fixed width for it. The main content area uses flex:1 to adapt to the remaining space. At the same time, it is recommended to use box-sizing:border-box globally to avoid padding affecting the layout, and ultimately achieve a simple and responsive split screen design.

CSSgradientsprovidesmoothcolortransitionswithoutimages.1.Lineargradientstransitioncolorsalongastraightlineusingdirectionsliketobottomorangleslike45deg,andsupportmultiplecolorstopsforcomplexeffects.2.Radialgradientsradiatefromacentralpointusingcircleo

Thehiddenattributeanddisplay:nonebothhideelementsbutdifferinsemantics,behavior,andusecases.1.ThehiddenattributeisasemanticHTMLfeaturethathideselementsandisoverriddenbyCSSunlessspecificityor!importantisused,whiledisplay:noneisapresentationalCSSrulefol