add hw2

node_modules/@react-aria/focus/dist/useHasTabbableChild.main.js

@@ -0,0 +1,62 @@
+var $a7a032acae3ddda9$exports = require("./FocusScope.main.js");
+var $6RLDH$reactariautils = require("@react-aria/utils");
+var $6RLDH$react = require("react");
+
+
+function $parcel$export(e, n, v, s) {
+  Object.defineProperty(e, n, {get: v, set: s, enumerable: true, configurable: true});
+}
+
+$parcel$export(module.exports, "useHasTabbableChild", () => $259c6413a286f2e6$export$eac1895992b9f3d6);
+/*
+ * Copyright 2022 Adobe. All rights reserved.
+ * This file is licensed to you under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License. You may obtain a copy
+ * of the License at http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software distributed under
+ * the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR REPRESENTATIONS
+ * OF ANY KIND, either express or implied. See the License for the specific language
+ * governing permissions and limitations under the License.
+ */ 
+
+
+function $259c6413a286f2e6$export$eac1895992b9f3d6(ref, options) {
+    let isDisabled = options === null || options === void 0 ? void 0 : options.isDisabled;
+    let [hasTabbableChild, setHasTabbableChild] = (0, $6RLDH$react.useState)(false);
+    (0, $6RLDH$reactariautils.useLayoutEffect)(()=>{
+        if ((ref === null || ref === void 0 ? void 0 : ref.current) && !isDisabled) {
+            let update = ()=>{
+                if (ref.current) {
+                    let walker = (0, $a7a032acae3ddda9$exports.getFocusableTreeWalker)(ref.current, {
+                        tabbable: true
+                    });
+                    setHasTabbableChild(!!walker.nextNode());
+                }
+            };
+            update();
+            // Update when new elements are inserted, or the tabIndex/disabled attribute updates.
+            let observer = new MutationObserver(update);
+            observer.observe(ref.current, {
+                subtree: true,
+                childList: true,
+                attributes: true,
+                attributeFilter: [
+                    'tabIndex',
+                    'disabled'
+                ]
+            });
+            return ()=>{
+                // Disconnect mutation observer when a React update occurs on the top-level component
+                // so we update synchronously after re-rendering. Otherwise React will emit act warnings
+                // in tests since mutation observers fire asynchronously. The mutation observer is necessary
+                // so we also update if a child component re-renders and adds/removes something tabbable.
+                observer.disconnect();
+            };
+        }
+    });
+    return isDisabled ? false : hasTabbableChild;
+}
+
+
+//# sourceMappingURL=useHasTabbableChild.main.js.map