From f080dcc55f1b4bdf35b1dbc6911739ea2ef6275f Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Ond=C5=99ej=20Hru=C5=A1ka?= <ondra@ondrovo.com>
Date: Tue, 3 Oct 2017 01:29:14 +0200
Subject: [PATCH] workaround for
 https://github.com/espterm/espterm-firmware/issues/240

---
 js/term/soft_keyboard.js | 1 +
 1 file changed, 1 insertion(+)

diff --git a/js/term/soft_keyboard.js b/js/term/soft_keyboard.js
index 55bfa82..9d89960 100644
--- a/js/term/soft_keyboard.js
+++ b/js/term/soft_keyboard.js
@@ -48,6 +48,7 @@ module.exports = function (screen, input) {
 
   // sends the difference between the last and the new composition string
   let sendInputDelta = function (newValue) {
+    if (newValue === null) newValue = '' // this sometimes happens, why?
     let resend = false
     if (newValue.length > lastCompositionString.length) {
       if (newValue.startsWith(lastCompositionString)) {