tweak undefined

Author: nichoth

src/browser/index.ts

@@ -60,6 +60,7 @@ function logger (
     { prevTime, color },
     env?:Record<string, string>
 ) {
+    args = args || []
     if (!isEnabled(namespace, env)) return
 
     // Set `diff` timestamp

src/node.ts

@@ -230,7 +230,9 @@ function formatArgs ({ diff, color, namespace, useColors }:{
     color:number,
     namespace:string,
     useColors:boolean
-}, args:string[]):typeof args {
+}, args:string[]):string[] {
+    args = args || []
+
     if (useColors) {
         const c = color
         const colorCode = '\u001B[3' + (c < 8 ? c : '8;5;' + c)