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!important 被用来明确 CSS 样式的优先级。这些类还可以作为 mixin(参见 less 文档) 使用。 Copy ... ... Copy // Classes .pull-left { float: left !important; } .pull-right { float: right !important; } // Usage as mixins .element { .pull-left(); } .another-element { .pull-right(...
There are hundreds of classes available—from positioning and sizing to colors and effects. Mix them with CSS variable overrides for even more control. Home Profile Contact Home Profile Contact
Group of classesCSS display .visible-*-block display: block; .visible-*-inline display: inline; .visible-*-inline-block display: inline-block; So, for extra small (xs) screens for example, the available .visible-*-* classes are: .visible-xs-block, .visible-xs-inline, and .visible-xs-...
Scope CSS classes with prefixes Stop the cascade /* Bad example */span{...}.page-container#stream .stream-item .tweet .tweet-header .username { ... }.avatar{...}/* Good example */.avatar{...}.tweet-header.username{...}.tweet.avatar{...} ...
Group of classesCSS display .visible-*-block display: block; .visible-*-inline display: inline; .visible-*-inline-block display: inline-block; So, for extra small (xs) screens for example, the available .visible-*-* classes are: .visible-xs-block, .visible-xs-inline, and .visible-xs-...
工具类(Utility classes) Utility classes—formerly helpers in Bootstrap 3—are a powerful ally in combating CSS bloat and poor page performance. A utility class is typically a single, immutable property-value pairing expressed as a class (e.g.,.d-blockrepresentsdisplay: block;). Their primary ...
最近在重新设计一个 UI 框架,因此也在考察同类项目的特征和要素。在读到《Bootstrap 编码规范》时,顺着链接发现了其作者@mdo的一篇文章,其中讲到 CSS 类名的设计思路。 [译] 使用前缀来限定 CSS 类的作用范围 Original:Scope CSS classes with prefixes ...
Group of classesCSS display .visible-*-block display: block; .visible-*-inline display: inline; .visible-*-inline-block display: inline-block; So, for extra small (xs) screens for example, the available .visible-*-* classes are: .visible-xs-block, .visible-xs-inline, and .visible-xs-...
Bootstrap All CSS ClassesPopular If you want to do more with Bootstrap components, see our complete Bootstrap 4 JavaScript/jQuery reference - all with "Try it Yourself" examples: Bootstrap 4 Exercises Test Yourself With Exercises Exercise: ...