perf(classnames): use arguments instead spread

bem · Aug 14, 2019 · 419604e · 419604e
1 parent b749948
commit 419604e
Showing 1 changed file with 4 additions and 3 deletions.
diff --git a/packages/classnames/classnames.tsx b/packages/classnames/classnames.tsx
@@ -11,13 +11,14 @@
  *
  * @param strings classNames strings
  */
-export function classnames(...strings: Array<string | undefined>) {
+export function classnames(...strings: Array<string | undefined>): string;
+export function classnames() {
     let className = '';
     const uniqueCache = new Set();
-    const classNameList = strings.join(' ').split(' ');
+    const classNameList: string[] = [].slice.call(arguments);
 
     for (const value of classNameList) {
-        if (value === '' || uniqueCache.has(value)) {
+        if (value === '' || value === undefined || uniqueCache.has(value)) {
             continue;
         }