noname

diff --git a/src/util.ts b/src/util.ts
index c6e68b3..23e9b93 100644
--- a/src/util.ts
+++ b/src/util.ts
@@ -130,6 +130,14 @@ export function decodeURIComponentSafe(value: string): string | null {
   }
 }
 
+export function defaultObject<Type>(defaultValue: Type): Record<string, Type> {
+  return new Proxy({}, {
+    get: function(target: Record<string, Type>, name: string) {
+      return target[name] ?? defaultValue;
+    },
+  });
+}
+
 export function escapeRegExp(string: string) {
   return string.replace(/[.*+?^${}()|[\]\\]/g, '\\$&');
 }
diff --git a/test/util.js b/test/util.js
index bd86a92..611e478 100644
--- a/test/util.js
+++ b/test/util.js
@@ -255,4 +255,12 @@ t.test('Util', async t => {
     t.equal(tablify([[1], [], [2, 3]]), '1\n\n2  3\n');
     t.end();
   });
+
+  t.test('defaultObject', t => {
+    const foo = util.defaultObject('foo');
+    foo.bar = 'bar';
+    t.equal(foo.foo, 'foo');
+    t.equal(foo.bar, 'bar');
+    t.end();
+  });
 });