Don't mutate the user-supplied object

sindresorhus · Dec 21, 2018 · f787bfc · f787bfc
1 parent 1d9e4ee
commit f787bfc
Showing 1 changed file with 3 additions and 1 deletion.
diff --git a/index.js b/index.js
@@ -13,7 +13,9 @@ const isAvailable = options => new Promise((resolve, reject) => {
 	});
 });
 
-const getPort = (options = {}) => {
+const getPort = options => {
+	options = Object.assign({}, options);
+
 	if (typeof options.port === 'number') {
 		options.port = [options.port];
 	}