Update XtermAddon.ts

Author: BattlefieldDuck

src/lib/XtermAddon.ts

@@ -35,9 +35,19 @@ export class XtermAddon {
 
     /**
      * Dynamically imports the 'ligatures' addon from `@xterm/addon-ligatures`.
+     *
+     * This addon is designed to be used in environments with access to Node.js APIs (such as Electron).
+     *
      * @returns A promise that resolves to the 'ligatures' addon module.
      */
-    static LigaturesAddon = async () => await import('@xterm/addon-ligatures');
+    static LigaturesAddon = async () => {
+        if (typeof process === 'undefined' || process.versions == null || process.versions.node == null) {
+            // This is not a Node.js environment
+            throw new Error('This module can only be imported in a Node.js environment');
+        }
+
+        return await import('@xterm/addon-ligatures');
+    }
 
     /**
      * Dynamically imports the 'search' addon from `@xterm/addon-search`.