fix: proxyObject ignore empty type

Author: zombieJ

src/proxyObject.ts

@@ -5,7 +5,7 @@ export default function proxyObject<
   Obj extends object,
   ExtendObj extends object
 >(obj: Obj, extendProps: ExtendObj): Obj & ExtendObj {
-  if (typeof Proxy !== 'undefined') {
+  if (typeof Proxy !== 'undefined' && obj) {
     return new Proxy(obj, {
       get(target, prop) {
         if (extendProps[prop]) {

tests/proxyObject.test.ts

@@ -12,4 +12,12 @@ describe('proxyObject', () => {
 
     expect(proxyA.bamboo).toBe('little');
   });
+
+  it('null', () => {
+    const proxyA = proxyObject(null, {
+      bamboo: 'little',
+    });
+
+    expect(proxyA).toBe(null);
+  });
 });