From e0544dc1aa701e33d00f287f6448046e9206ce98 Mon Sep 17 00:00:00 2001
From: Jakub Jankiewicz <jcubic@onet.pl>
Date: Tue, 21 May 2024 20:38:01 +0200
Subject: [PATCH] ignore null and undefined in echo

---
 src/prefix.js | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/src/prefix.js b/src/prefix.js
index 462748a..2532e34 100644
--- a/src/prefix.js
+++ b/src/prefix.js
@@ -254,7 +254,10 @@ class WebAdapter {
         }
         this._term.error(message);
     }
-    echo(arg = "", options = {}) {
+    echo(arg = null, options = {}) {
+        if (arg === undefined || arg === null) {
+            return;
+        }
         if (typeof arg !== 'function') {
             arg = to_string(arg);
         }