fix: cleanup deprecated core functionality (#3219)

BREAKING CHANGE: Several deprecated core functionality has been removed.
- dom.js `getDocumentWritingMode()` removed
- dom.js `getLocalName()` removed
- eventing.js `formElementHandlerAspect()` removed
- eventing.js `HandlerRepository`, `HandlerAspectParams` and
`HandlerAspect` removed
- mixins.js `SbbFocusableDisabledActionMixin` removed
- observers.js completely removed (containing
`NodeIntersectionObserver`, `AgnosticIntersectionObserver`,
`NodeMutationObserver`, `AgnosticMutationObserver`, `NodeResizeObserver`
and `AgnosticResizeObserver`)

src/elements/core/dom.ts

@@ -1,9 +1,7 @@
 export * from './dom/breakpoint.js';
 export * from './dom/find-referenced-element.js';
-export * from './dom/get-document-writing-mode.js';
 export * from './dom/host-context.js';
 export * from './dom/input-element.js';
 export * from './dom/set-or-remove-attribute.js';
 export * from './dom/platform.js';
 export * from './dom/scroll.js';
-export * from './dom/ssr.js';

src/elements/core/eventing.ts

@@ -3,6 +3,5 @@ export * from './eventing/event-emitter.js';
 export * from './eventing/event-target.js';
 export * from './eventing/form-element-handlers.js';
 export * from './eventing/forward-event.js';
-export * from './eventing/handler-repository.js';
 export * from './eventing/is-event-prevented.js';
 export * from './eventing/throttle.js';

src/elements/core/eventing/form-element-handlers.ts

@@ -1,5 +1,3 @@
-import type { HandlerAspect } from './handler-repository.js';
-
 /**
  * Prevents scrolling from pressing Space
  * @param event The origin event.
@@ -9,12 +7,3 @@ export function preventScrollOnSpacebarPress(event: KeyboardEvent): void {
     event.preventDefault();
   }
 }
-
-/**
- * Handler to prevent scrolling on space bar click.
- *
- * @deprecated TODO: remove once radio button became form element
- */
-export const formElementHandlerAspect: HandlerAspect = ({ host, signal }) => {
-  host.addEventListener('keydown', preventScrollOnSpacebarPress, { signal });
-};

src/elements/core/mixins/disabled-mixin.ts

@@ -97,33 +97,3 @@ export const SbbDisabledTabIndexActionMixin = <
   > &
     T;
 };
-
-/**
- * Extends `SbbDisabledMixin` with the `aria-disabled` attribute.
- * For a11y purposes, keeps the element focusable even when disabled.
- * @deprecated Will be removed with next major version
- */
-// eslint-disable-next-line @typescript-eslint/naming-convention
-export const SbbFocusableDisabledActionMixin = <T extends AbstractConstructor<LitElement>>(
-  superClass: T,
-): AbstractConstructor<SbbDisabledMixinType> & T => {
-  abstract class SbbFocusableDisabledAction
-    extends SbbDisabledMixin(superClass)
-    implements SbbDisabledMixinType
-  {
-    protected override willUpdate(changedProperties: PropertyValues<this>): void {
-      super.willUpdate(changedProperties);
-
-      if (!changedProperties.has('disabled')) {
-        return;
-      }
-
-      if (this.disabled) {
-        this.setAttribute('aria-disabled', 'true');
-      } else {
-        this.removeAttribute('aria-disabled');
-      }
-    }
-  }
-  return SbbFocusableDisabledAction as AbstractConstructor<SbbDisabledMixinType> & T;
-};