diff --git a/js/global.d.ts b/js/global.d.ts
index 393390ead5..69176af7da 100644
--- a/js/global.d.ts
+++ b/js/global.d.ts
@@ -1,15 +1,9 @@
-// libraries/classes/Controllers/JavaScriptMessagesController.php
-declare var Messages: { [p: string]: string };
-
-// templates/javascript/variables.twig
-declare var firstDayOfCalendar: string;
-declare var themeImagePath: string;
-declare var mysqlDocTemplate: string;
-declare var maxInputVars: number;
-
-declare function sprintf(format: string, ...values: (string|number)[]): string;
-
 interface Window {
+    Messages: { [p: string]: string };
+    maxInputVars: number;
+    mysqlDocTemplate: string;
+    themeImagePath: string;
+    firstDayOfCalendar: string;
     ol: any;
     opera: any;
     zxcvbnts: any;
@@ -17,6 +11,8 @@ interface Window {
     u2f: any;
     drawOpenLayers: () => any;
     variableNames: string[];
+
+    sprintf(format: string, ...values: (string|number)[]): string;
 }
 
 interface JQuery {
diff --git a/js/src/designer/history.ts b/js/src/designer/history.ts
index 10f329723d..9b0b2390f1 100644
--- a/js/src/designer/history.ts
+++ b/js/src/designer/history.ts
@@ -682,7 +682,7 @@ const queryFrom = function () {
     var parts = [];
     var tArray = [];
     tArray = window.fromArray;
-    var K = 0;
+    var K: any = 0;
     var k;
     var key;
     var key2;
diff --git a/js/src/makegrid.ts b/js/src/makegrid.ts
index 6d6b905c1e..46ad2032e5 100644
--- a/js/src/makegrid.ts
+++ b/js/src/makegrid.ts
@@ -1129,7 +1129,7 @@ const makeGrid = function (t, enableResize = undefined, enableReorder = undefine
                     var timeFormat = 'HH:mm:ss';
                     // check for decimal places of seconds
                     if ((Number($td.attr('data-decimals')) > 0) && ($td.attr('data-type').indexOf('time') !== -1)) {
-                        if (datetimeValue && datetimeValue.indexOf('.') === false) {
+                        if (datetimeValue && datetimeValue.indexOf('.') === -1) {
                             datetimeValue += '.';
                         }
 
diff --git a/js/src/modules/functions/checkNumberOfFields.ts b/js/src/modules/functions/checkNumberOfFields.ts
index e718d42533..85cc19ea8c 100644
--- a/js/src/modules/functions/checkNumberOfFields.ts
+++ b/js/src/modules/functions/checkNumberOfFields.ts
@@ -10,6 +10,7 @@ export default function checkNumberOfFields () {
         return false;
     }
 
+    // @ts-ignore
     if (false === window.maxInputVars) {
         return false;
     }
diff --git a/webpack.config.cjs b/webpack.config.cjs
index 7563282c63..e8c290b209 100644
--- a/webpack.config.cjs
+++ b/webpack.config.cjs
@@ -12,8 +12,6 @@ const publicPath = path.resolve(__dirname, 'public');
 const typeScriptErrorsToIgnore = [
     2322, // TS2322: Type '%s' is not assignable to type '%s'.
     2345, // TS2345: Argument of type '%s' is not assignable to parameter of type '%s'.
-    2367, // TS2367: This comparison appears to be unintentional because the types '%s' and '%s' have no overlap.
-    2405, // TS2405: The left-hand side of a 'for...in' statement must be of type 'string' or 'any'.
     2538, // TS2538: Type '%s' cannot be used as an index type.
     2769, // TS2769: No overload matches this call.
     5096, // TS5096: Option 'allowImportingTsExtensions' can only be used when either 'noEmit' or 'emitDeclarationOnly' is set.