fix(utils): remove unnecessary keyboard utils (#146)

packages/utils/src/dom/index.ts

@@ -1,6 +1,5 @@
 export * from './attributes';
 export * from './element';
 export * from './event';
-export * from './keyboard';
 export * from './safe-polygon';
 export * from './shadow-dom';

packages/utils/src/dom/keyboard.ts

@@ -1,46 +0,0 @@
-import type { FocusableElement } from 'tabbable';
-import { tabbable } from 'tabbable';
-import { activeElement, getDocument } from './element';
-
-export function getTabbableOptions(): Readonly<{
-  getShadowRoot: boolean;
-  displayCheck: 'full' | 'none';
-}> {
-  // JSDOM does not support the `tabbable` library. To solve this we can
-  // check if `ResizeObserver` is a real function (not polyfilled), which
-  // determines if the current environment is JSDOM-like.
-  const isNativeResizeObserver: boolean = typeof ResizeObserver === 'function' && ResizeObserver.toString().includes('[native code]');
-  const displayCheck: 'full' | 'none' = isNativeResizeObserver ? 'full' : 'none';
-
-  return ({
-    getShadowRoot: true,
-    displayCheck: displayCheck as 'full' | 'none',
-  }) as const;
-}
-
-function getTabbableIn(container: HTMLElement, dir: 1 | -1): FocusableElement | undefined {
-  const list = tabbable(container, getTabbableOptions());
-  const len = list.length;
-  if (len === 0) {
-    return undefined;
-  }
-
-  const active = activeElement(getDocument(container)) as FocusableElement;
-  const index = list.indexOf(active);
-
-  const nextIndex = index === -1 ? (dir === 1 ? 0 : len - 1) : index + dir;
-
-  return list[nextIndex];
-}
-
-export function getNextTabbable(referenceElement: Element | null): FocusableElement | null {
-  return (
-    getTabbableIn(getDocument(referenceElement).body, 1) || (referenceElement as FocusableElement)
-  );
-}
-
-export function getPreviousTabbable(referenceElement: Element | null): FocusableElement | null {
-  return (
-    getTabbableIn(getDocument(referenceElement).body, -1) || (referenceElement as FocusableElement)
-  );
-}