-***API** - All responses fulfilled with settings (like `mockResponse`) will now receive a settings object with all values resolved. For example `url` will be `/user/2/` and not `user/{id}` in the callback. - #3466
-**API** - API now allows the use of settings `response` and `responseAsync` to replace `mockResponse` and `mockResponseAsync`. The use of "mock" may not represent the most common use case which is providing a response from a third party source. (These changes are purely cosmetic and no underlying behavior has changed) - #3491
-**Popup** - Adds `onUnplaceable` callback when element cannot be place in visible screen #3388
-***API** - All responses fulfilled with settings (like `mockResponse`) will now receive a settings object with all values resolved. For example `url` will be `/user/2/` and not `user/{id}` in the callback. - [#3466](https://github.com/Semantic-Org/Semantic-UI/issues/3466)
-**API** - API now allows the use of settings `response` and `responseAsync` to replace `mockResponse` and `mockResponseAsync`. The use of "mock" may not represent the most common use case which is providing a response from a third party source. (These changes are purely cosmetic and no underlying behavior has changed) - [#3491](https://github.com/Semantic-Org/Semantic-UI/issues/3491)
-**Popup** - Adds `onUnplaceable` callback when element cannot be place in visible screen [#3388](https://github.com/Semantic-Org/Semantic-UI/issues/3388)
**Bug Fixes**
-**Build Tools** - CSS build will now correctly call callback after both packaged files are created (compressed and uncompressed) Thanks @youngjay#3405
-**Flag** - A flag with no country set will no longer display an incorrect country flag. Thanks @space-alien #3333
-**Form** - Fixed issue where text would turn transparent inside a `loading form`#3122
-**Menu** - Fixed `1px` offset when `attached segment` follows `tabular menu` (max of 2 consecutive segments) #3479
-**Header** - `sub header` used inside a header now correctly forces `block` styling #3020
-**Popup** - Fixed `is visible`, `is animating`, and `is fluid` to always return `true/false` and not the DOM element. #2781
-**Popup** - Fixed issue with `onEnable` callback being defined with name `onEnabled` and `onDisable` with `onDisabled` in default settings, causing an error. To preserve backwards compatibility, the mispelled callback name has been left, but the bug has been fixed. #3148
-**Search** - Search now correctly hides menu when an error message inside results is clicked. #3039
-**Sidebar** - Fixed css rule issue causing `very thin` sidebar to not work #3300
-**Sidebar** - Sidebar no longer includes `transform` rules on child elements, this was causing layout issues in some cases (for example dropdowns in sidebars) #3306
-**Build Tools** - CSS build will now correctly call callback after both packaged files are created (compressed and uncompressed) Thanks @youngjay[#3405](https://github.com/Semantic-Org/Semantic-UI/issues/3405)
-**Flag** - A flag with no country set will no longer display an incorrect country flag. Thanks @space-alien [#3333](https://github.com/Semantic-Org/Semantic-UI/issues/3333)
-**Form** - Fixed issue where text would turn transparent inside a `loading form`[#3122](https://github.com/Semantic-Org/Semantic-UI/issues/3122)
-**Menu** - Fixed `1px` offset when `attached segment` follows `tabular menu` (max of 2 consecutive segments) [#3479](https://github.com/Semantic-Org/Semantic-UI/issues/3479)
-**Header** - `sub header` used inside a header now correctly forces `block` styling [#3020](https://github.com/Semantic-Org/Semantic-UI/issues/3020)
-**Popup** - Fixed `is visible`, `is animating`, and `is fluid` to always return `true/false` and not the DOM element. [#2781](https://github.com/Semantic-Org/Semantic-UI/issues/2781)
-**Popup** - Fixed issue with `onEnable` callback being defined with name `onEnabled` and `onDisable` with `onDisabled` in default settings, causing an error. To preserve backwards compatibility, the mispelled callback name has been left, but the bug has been fixed. [#3148](https://github.com/Semantic-Org/Semantic-UI/issues/3148)
-**Search** - Search now correctly hides menu when an error message inside results is clicked. [#3039](https://github.com/Semantic-Org/Semantic-UI/issues/3039)
-**Sidebar** - Fixed css rule issue causing `very thin` sidebar to not work [#3300](https://github.com/Semantic-Org/Semantic-UI/issues/3300)
-**Sidebar** - Sidebar no longer includes `transform` rules on child elements, this was causing layout issues in some cases (for example dropdowns in sidebars) [#3306](https://github.com/Semantic-Org/Semantic-UI/issues/3306)
-**Sticky** - Renames variables used to account for scroll offset internally for greater code clarity
-**Transition** - Fixes `noAnimation` error to more reasonably announce that the element is "not in the DOM" #3040
-**Transition** - Fixes `noAnimation` error to more reasonably announce that the element is "not in the DOM" [#3040](https://github.com/Semantic-Org/Semantic-UI/issues/3040)