Straight through shortcut

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(),
+    };
+  },
+});