• Modal/Dimmer - Modals and dimmers now include a new setting useFlex which defaults to auto. Modals and dimmers will automatically revert to using non-flex layouts when there may be layout issues with using flexbox. Modals will fall back to JS position when detachable: false is used or with IE11/Edge (Absolutely positioned elements inside flex containers in IE behave differently).

A general solution will most likely require branching code for IE11 which will disable flex (as IE11 doesnt correctly implement the latest spec for absolute positioned flex containers).

• Sticky - Fixed an issue where ui sticky used with a percentage based width would not resize properly if the content size of container changed when "stuck" #4360

• Sticky - Adds container setting. This can be used to specify the offsetParent of the sticky element and avoid having to calculate on initialization (improving performance)

• Sticky - Fixes bug where sticky would stick at incorrect times when using a different scroll container than body and scrollTop is not 0 on page load.

• Menu - Fixed issue where right menu was not floating correctly inside a menu > container on mobile #2969

• Container - Fix issue with fluid container being 100% + gutter at mobile resolution (causing overflow)
• Grid / Container - ui relaxed grid container and ui very relaxed grid container will now all render at same container width

• Sticky - Fixed sticky content jumping from fixed to bound bottom when scroll position has surpassed bottom of container during page refresh.
• Sticky - Sticky no longer uses bottomPadding to determine bottom edge of container.

• Grid - page grid has been deprecated. page grids used percentage gutters which made it unnecessarily difficult to style responsive page content. Moving forward we recommend using ui container a fixed width responsive container for holding page contents.
• Container - Containers are fixed width containers meant for holding page contents, and are a simpler alternative to ui page grid, view more examples in docs
• Search - Search will now generate results container if one is not present on init
• Dropdown - Fixed dropdown menu items should not center inside of a center aligned container.
• Rail - Rail 100% height now uses border-box to ensure exact height match to container
• Sticky - Fix issues when pushing: true with sticky content having incorrect bottom spacing, when container has bottom padding

• Grid - Fixed right/left/center aligned to adjust align-items in flex containers like equal height/width

• Table - Fixes table on mobile sizes can surpass parent container width
• Sticky - Fix bottom attached position not adjusting for bottom padding on container element

• Button - Fixes <button> inside vertical buttons not taking full container width

• Sticky - Fixes issue with container size not being set explicitly on rail due to improper method renaming

• Grid - Fixed page grid allows for fixed pixel size containers used with a grid instead of percentage