From c7aeed9d6984a23225490b07235c5635295f21e0 Mon Sep 17 00:00:00 2001
From: Roman Frolov <justcallmefrolov@gmail.com>
Date: Wed, 12 May 2021 17:27:20 +0300
Subject: [PATCH] [javascript mode] Properly handle exclamation marks in class
 fields

---
 mode/javascript/javascript.js | 1 +
 1 file changed, 1 insertion(+)

diff --git a/mode/javascript/javascript.js b/mode/javascript/javascript.js
index 46ac459d5b..2b508c4829 100644
--- a/mode/javascript/javascript.js
+++ b/mode/javascript/javascript.js
@@ -799,6 +799,7 @@ CodeMirror.defineMode("javascript", function(config, parserConfig) {
     if (value == "@") return cont(expression, classBody)
   }
   function classfield(type, value) {
+    if (value == "!") return cont(classfield)
     if (value == "?") return cont(classfield)
     if (type == ":") return cont(typeexpr, maybeAssign)
     if (value == "=") return cont(expressionNoComma)