diff --git a/js/lib.main.js b/js/lib.main.js
index b22837c..a218f76 100644
--- a/js/lib.main.js
+++ b/js/lib.main.js
@@ -38,6 +38,10 @@ const delay = ms => new Promise(res => setTimeout(res, ms));
    implementation of log helper */
 async function log(msg, type) {
     var time = new Date().toISOString();
+    const mode = "prod"
+    if (mode === "prod" && type != "ERR") {
+        return;
+    }
     switch (type) {
         case "ERR":
             console.error(`${time} - ${msg}`);