What does padding mean in html?

TheCSSfilterpropertyallowsvisualeffectslikeblur,brightness,andgrayscaletobeapplieddirectlytoHTMLelements.1)Usethesyntaxfilter:filter-function(value)toapplyeffects.2)Combinemultiplefilterswithspaceseparation,e.g.,blur(2px)brightness(70%).3)Commonfunct

Use a div with border to quickly create vertical lines, and define styles and heights by setting border-left and height; 2. Use ::before or ::after pseudo-elements to add vertical lines without additional HTML tags, suitable for decorative separation; 3. In Flexbox layout, by setting the width and background color of the divider class, adaptive vertical dividers between elastic containers can be achieved; 4. In CSSGrid, insert vertical lines as independent columns (such as autowidth columns) into grid layout, which is suitable for responsive design; the most appropriate method should be selected according to the specific layout needs to ensure that the structure is simple and easy to maintain.

When using CSS selectors, low-specific selectors should be used first to avoid excessive limitations; 1. Understand the specificity level and use them reasonably in the order of type, class, and ID; 2. Use multi-purpose class names to improve reusability and maintainability; 3. Use attributes and pseudo-class selectors to avoid performance problems; 4. Keep the selector short and clear scope; 5. Use BEM and other naming specifications to improve structural clarity; 6. Avoid the abuse of tag selectors and:nth-child, and give priority to the use of tool classes or modular CSS to ensure that the style is controllable for a long time.

Yes, you can make HTML elements editable by using the contenteditable attribute. The specific method is to add contenteditable="true" to the target element. For example, you can edit this text, and the user can directly click and modify the content. This attribute is suitable for block-level and in-line elements such as div, p, span, h1 to h6. The default value is "true" to be editable, "false" to be non-editable, and "inherit" to inherit the parent element settings. In order to improve accessibility, it is recommended to add tabindex="0&quo

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.

Useaflexiblecontainerwithheight:100vhormin-heightandbackground-size:covertoensuretheherosectionfillstheviewportwhilemaintainingimageaspectratio.2.PlacecenteredcontentusingFlexboxorplace-items:centerinCSSGridforverticalandhorizontalalignment.3.Maketex

HTMLdata-* attribute is used to store custom data in elements and can be accessed through JavaScript's dataset or getAttribute/setAttribute method; 1. When using dataset, data-camel-case corresponds to camelCaseName, and the values are both string types; 2. Common uses include storing element configuration, server-side data transfer and UI status tracking; 3. Storing sensitive information should be avoided, not repeating the existing content of DOM, keeping the value concise, and accessing it with camelCase, so as to achieve a clear separation of HTML and JavaScript.

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