diff --git a/src/responsive.ts b/src/responsive.ts
index bd7b2e3..1a84c6b 100644
--- a/src/responsive.ts
+++ b/src/responsive.ts
@@ -16,7 +16,7 @@ export default class Responsive
      *
      * @param currentWidth
      */
-    getNumberOnScreen(currentWidth: number)
+    getNumberOnScreen(currentWidth: number = document.documentElement.clientWidth)
     {
         // Screen too small
         if (currentWidth < vhToPx(this.margin) * 2 + this.minWidth) return 1;