pre-installations and preparations

node_modules/@mui/base/node/useMenu/menuReducer.js

@@ -0,0 +1,49 @@
+"use strict";
+
+var _interopRequireDefault = require("@babel/runtime/helpers/interopRequireDefault");
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+exports.menuReducer = menuReducer;
+var _extends2 = _interopRequireDefault(require("@babel/runtime/helpers/extends"));
+var _useList = require("../useList");
+function menuReducer(state, action) {
+  if (action.type === _useList.ListActionTypes.itemHover) {
+    return (0, _extends2.default)({}, state, {
+      highlightedValue: action.item
+    });
+  }
+  const newState = (0, _useList.listReducer)(state, action);
+
+  // make sure an item is always highlighted
+  if (newState.highlightedValue === null && action.context.items.length > 0) {
+    return (0, _extends2.default)({}, newState, {
+      highlightedValue: action.context.items[0]
+    });
+  }
+  if (action.type === _useList.ListActionTypes.keyDown) {
+    if (action.event.key === 'Escape') {
+      return (0, _extends2.default)({}, newState, {
+        open: false
+      });
+    }
+  }
+  if (action.type === _useList.ListActionTypes.blur) {
+    var _action$context$listb;
+    if (!((_action$context$listb = action.context.listboxRef.current) != null && _action$context$listb.contains(action.event.relatedTarget))) {
+      var _action$context$listb2, _action$event$related;
+      // To prevent the menu from closing when the focus leaves the menu to the button.
+      // For more details, see https://github.com/mui/material-ui/pull/36917#issuecomment-1566992698
+      const listboxId = (_action$context$listb2 = action.context.listboxRef.current) == null ? void 0 : _action$context$listb2.getAttribute('id');
+      const controlledBy = (_action$event$related = action.event.relatedTarget) == null ? void 0 : _action$event$related.getAttribute('aria-controls');
+      if (listboxId && controlledBy && listboxId === controlledBy) {
+        return newState;
+      }
+      return (0, _extends2.default)({}, newState, {
+        open: false,
+        highlightedValue: action.context.items[0]
+      });
+    }
+  }
+  return newState;
+}