sync: interactive-roles to canonical (use strict added)

Author: johanrd

lib/utils/interactive-roles.js

@@ -1,3 +1,5 @@
+'use strict';
+
 const { roles } = require('aria-query');
 
 // Interactive ARIA roles — concrete roles whose taxonomy descends from `widget`
@@ -106,13 +108,17 @@ function buildCompositeWidgetChildren() {
     const out = new Set();
     const kids = direct.get(role);
     if (!kids) {
+      closed.set(role, out);
       return out;
     }
     for (const child of kids) {
       out.add(child);
       if (!visited.has(child)) {
-        visited.add(child);
-        for (const grandchild of expand(child, visited)) {
+        // Pass a fresh branch-specific visited set so sibling branches do not
+        // contaminate each other's traversal. A shared Set across branches
+        // makes memoized results order-dependent, because whether `child` is
+        // recursed into depends on which sibling ran first.
+        for (const grandchild of expand(child, new Set([...visited, child]))) {
           out.add(grandchild);
         }
       }