Straight through shortcut

src/editor/extensions.ts

@@ -7,6 +7,7 @@ import { TextAlign } from "./align";
 import { SearchHighlight } from "./search";
 import { Proofing } from "./proofing";
 import { Paste } from "./paste";
+import { Shortcuts } from "./shortcuts";
 
 export const editorExtensions: Extensions = [
   StarterKit.configure({
@@ -23,4 +24,5 @@ export const editorExtensions: Extensions = [
   SearchHighlight,
   Proofing,
   Paste,
+  Shortcuts,
 ];

src/editor/shortcuts.ts

@@ -0,0 +1,11 @@
+import { Extension } from "@tiptap/core";
+
+export const Shortcuts = Extension.create({
+  name: "shortcuts",
+
+  addKeyboardShortcuts() {
+    return {
+      "Mod-Shift-x": () => this.editor.commands.toggleStrike(),
+    };
+  },
+});