Offcanvas as component (#29017)

* Add a new offcanvas component

* offcanvas.js: switch to string constants and `event.key`

* Remove unneeded code

* Sass optimizations

* Fixes

Make sure the element is hidden and not offscreen when inactive
fix close icon negative margins
Add content in right & bottom examples
Re-fix bottom offcanvas height not to cover all viewport

* Wording tweaks

* update tests and offcanvas class

* separate scrollbar functionality and use it in offcanvas

* Update .bundlewatch.config.json

* fix focus

* update btn-close / fix focus on close

* add aria-modal and role
return focus on trigger when offcanvas is closed
change body scrolling timings

* move common code to reusable functions

* add aria-labelledby

* Replace lorem ipsum text

* fix focus when offcanvas is closed

* updates

* revert modal, add tests for scrollbar

* show backdrop by default

* Update offcanvas.md

* Update offcanvas CSS to better match modals

- Add background-clip for borders
- Move from outline to border (less clever, more consistent)
- Add scss-docs in vars

* Revamp offcanvas docs

- Add static example to show and explain the components
- Split live examples and rename them
- Simplify example content
- Expand docs notes elsewhere
- Add sass docs

* Add .offcanvas-title instead of .modal-title

* Rename offcanvas example to offcanvas-navbar to reflect it's purpose

* labelledby references title and not header

* Add default shadow to offcanvas

* enable offcanvas-body to fill all the remaining wrapper area

* Be more descriptive, on Accessibility area

* remove redundant classes

* ensure in case of an already open offcanvas, not to open another one

* bring back backdrop|scroll combinations

* bring back toggling class

* refactor scrollbar method, plus tests

* add check if element is not full-width, according to #30621

* revert all in modal

* use documentElement innerWidth

* Rename classes to -start and -end

Also copyedit some docs wording

* omit some things on scrollbar

* PASS BrowserStack tests

-- IOS devices, Android devices and Browsers on Mac, hide scrollbar by default and appear it, only while scrolling.

* Rename '_handleClosing' to '_addEventListeners'

* change pipe usage to comma

* change Data.getData to Data.get

Co-authored-by: XhmikosR <xhmikosr@gmail.com>
Co-authored-by: Martijn Cuppens <martijn.cuppens@gmail.com>
Co-authored-by: Mark Otto <markdotto@gmail.com>

2 files changed, 3 insertions, 6 deletions

diff --git a/site/data/examples.yml b/site/data/examples.yml
index 0ddafaf416..d243bdad0d 100644
--- a/site/data/examples.yml
+++ b/site/data/examples.yml
@@ -47,12 +47,8 @@
       description: "Single navbar example with a fixed top navbar along with some additional content."
     - name: Navbar bottom
       description: "Single navbar example with a bottom navbar along with some additional content."
-
-- category: Experiments
-  description: "Examples that focus on future-friendly features or techniques."
-  examples:
-    - name: Offcanvas
-      description: "Turn your expandable navbar into a sliding offcanvas menu."
+    - name: Offcanvas navbar
+      description: "Turn your expandable navbar into a sliding offcanvas menu (doesn't use our offcanvas component)."
 
 - category: RTL
   description: "See Bootstrap's RTL version in action with these modified Custom Components examples."
diff --git a/site/data/sidebar.yml b/site/data/sidebar.yml
index 2c8f9b45c9..4e43255a3b 100644
--- a/site/data/sidebar.yml
+++ b/site/data/sidebar.yml
@@ -72,6 +72,7 @@
     - title: Modal
     - title: Navs & tabs
     - title: Navbar
+    - title: Offcanvas
     - title: Pagination
     - title: Popovers
     - title: Progress