avoid transforming functions

sindresorhus · Oct 1, 2015 · f96ea5e · f96ea5e
1 parent 63df83f
commit f96ea5e
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Showing 2 changed files with 14 additions and 1 deletion.
diff --git a/index.js b/index.js
@@ -11,6 +11,10 @@ function toObject(val) {
 	return Object(val);
 }
 
+function isFunc(val) {
+	return typeof val === 'function';
+}
+
 function base(to, from) {
 	if (to === from) {
 		return to;
@@ -24,7 +28,7 @@ function base(to, from) {
 
 			if (Array.isArray(val)) {
 				to[key] = val.slice();
-			} else if (isObj(val)) {
+			} else if (isObj(val) && !isFunc(val)) {
 				to[key] = base(to[key] || {}, val);
 			} else if (val !== undefined) {
 				to[key] = val;

diff --git a/test.js b/test.js
@@ -106,3 +106,12 @@ if (typeof Symbol !== 'undefined') {
 		t.end();
 	});
 }
+
+test('do not transform functions', t => {
+	var target = {
+		foo: function bar() {}
+	};
+	var source = {};
+	t.is(typeof fn({}, target, source).foo, 'function');
+	t.end();
+});