Bootstrap 3.3.5 发布，该版本着重修复了 bug，改进辅助功能，以及文档更新。值得关注更新如下：

• Updated to Normalize.css v3.0.3.
• List groups now support <button> elements.
• Cleaned up some extraneous padding on jumbotrons across various viewports.
• Fixed input group sizing classes on all supported elements for real this time.
• Applied a few tooltip and Popover positioning fixes.
• Fixed behavior when using tooltips and popovers that are triggered by multiple events.
• Fixed some memory leakage in the tooltip and popover plugins.
• Fixed incorrect Affix positioning when a webpage has a sticky footer.
• Fixed npm package to include all Grunt scripts, so that grunt dist works if you installed Bootstrap from npm.

更多内容请查看更新日志： changelog
下载：v3.3.5
Bootstrap是Twitter推出的一个用于前端开发的开源工具包。它由Twitter的设计师Mark Otto和Jacob Thornton合作开发，是一个CSS/HTML框架。目前，Bootstrap最新版本为3.3.5 。