fix date object

package.json

@@ -1,6 +1,6 @@
 {
   "name": "default-composer",
-  "version": "0.5.2",
+  "version": "0.5.3",
   "description": "A JavaScript library that allows you to set default values for nested objects",
   "main": "dist/index.js",
   "umd:main": "dist/index.umd.js",

src/index.test.ts

@@ -313,18 +313,32 @@ describe("defaultComposer", () => {
   it('should respect the Date object', () => {
     const defaults = {
       date: new Date(),
+      range: {
+        startDate: new Date(2020, 1, 1),
+        endDate: new Date(2020, 1, 2),
+      }
     };
 
     const object = {
       date: new Date(2020, 1, 1),
       anotherDate: new Date(2020, 2, 1),
     };
 
+    const output = defaultComposer<any>(defaults, object);
+
     const expected = {
       date: new Date(2020, 1, 1),
       anotherDate: new Date(2020, 2, 1),
+      range: {
+        startDate: new Date(2020, 1, 1),
+        endDate: new Date(2020, 1, 2),
+      }
     };
 
-    expect(defaultComposer<any>(defaults, object)).toEqual(expected);
+    expect(output).toEqual(expected);
+    expect(output.date).toBeInstanceOf(Date);
+    expect(output.anotherDate).toBeInstanceOf(Date);
+    expect(output.range.startDate).toBeInstanceOf(Date);
+    expect(output.range.endDate).toBeInstanceOf(Date);
   });
 });

src/index.ts

@@ -68,7 +68,7 @@ function compose<T>(defaults: Partial<T>, obj: Partial<T>): Partial<T> {
 }
 
 function isObject(value: any): boolean {
-  return typeof value === "object" && value !== null && !Array.isArray(value);
+  return typeof value === "object" && value !== null && !(value instanceof Date) && !Array.isArray(value);
 }
 
 function isEmptyObjectOrArray<T>(object: T): boolean {