diff --git a/src/public/app/widgets/buttons/attachments_actions.js b/src/public/app/widgets/buttons/attachments_actions.ts
similarity index 86%
rename from src/public/app/widgets/buttons/attachments_actions.js
rename to src/public/app/widgets/buttons/attachments_actions.ts
index 5ee51b9d9..f25e9c376 100644
--- a/src/public/app/widgets/buttons/attachments_actions.js
+++ b/src/public/app/widgets/buttons/attachments_actions.ts
@@ -8,6 +8,8 @@ import appContext from "../../components/app_context.js";
 import openService from "../../services/open.js";
 import utils from "../../services/utils.js";
 import { Dropdown } from "bootstrap";
+import type attachmentsApiRoute from "../../../../routes/api/attachments.js"
+import type FAttachment from "../../entities/fattachment.js";
 
 const TPL = `
 <div class="dropdown attachment-actions">
@@ -79,7 +81,12 @@ const TPL = `
 </div>`;
 
 export default class AttachmentActionsWidget extends BasicWidget {
-    constructor(attachment, isFullDetail) {
+    $uploadNewRevisionInput!: JQuery<HTMLInputElement>;
+    attachment: FAttachment;
+    isFullDetail: boolean;
+    dropdown!: Dropdown;
+
+    constructor(attachment: FAttachment, isFullDetail: boolean) {
         super();
 
         this.attachment = attachment;
@@ -92,20 +99,21 @@ export default class AttachmentActionsWidget extends BasicWidget {
 
     doRender() {
         this.$widget = $(TPL);
-        this.dropdown = Dropdown.getOrCreateInstance(this.$widget.find("[data-bs-toggle='dropdown']"));
+        this.dropdown = Dropdown.getOrCreateInstance(this.$widget.find("[data-bs-toggle='dropdown']")[0]);
         this.$widget.on("click", ".dropdown-item", () => this.dropdown.toggle());
 
         this.$uploadNewRevisionInput = this.$widget.find(".attachment-upload-new-revision-input");
         this.$uploadNewRevisionInput.on("change", async () => {
-            const fileToUpload = this.$uploadNewRevisionInput[0].files[0]; // copy to allow reset below
+
+            const fileToUpload = this.$uploadNewRevisionInput[0].files?.item(0);  // copy to allow reset below
             this.$uploadNewRevisionInput.val("");
-
-            const result = await server.upload(`attachments/${this.attachmentId}/file`, fileToUpload);
-
-            if (result.uploaded) {
-                toastService.showMessage(t("attachments_actions.upload_success"));
-            } else {
-                toastService.showError(t("attachments_actions.upload_failed"));
+            if (fileToUpload) {
+                const result = await server.upload(`attachments/${this.attachmentId}/file`, fileToUpload);
+                if (result.uploaded) {
+                    toastService.showMessage(t("attachments_actions.upload_success"));
+                } else {
+                    toastService.showError(t("attachments_actions.upload_failed"));
+                }
             }
         });
 
@@ -122,6 +130,7 @@ export default class AttachmentActionsWidget extends BasicWidget {
             const $openAttachmentCustomButton = this.$widget.find("[data-trigger-command='openAttachmentCustom']");
             $openAttachmentCustomButton.addClass("disabled").append($('<span class="bx bx-info-circle disabled-tooltip" />').attr("title", t("attachments_actions.open_custom_client_only")));
         }
+
     }
 
     async openAttachmentCommand() {
@@ -141,7 +150,8 @@ export default class AttachmentActionsWidget extends BasicWidget {
     }
 
     async copyAttachmentLinkToClipboardCommand() {
-        this.parent.copyAttachmentLinkToClipboard();
+        //TriliumNextTODO: the parent here is AttachmentDetailWidget
+        this.parent?.copyAttachmentLinkToClipboard();
     }
 
     async deleteAttachmentCommand() {
@@ -158,7 +168,8 @@ export default class AttachmentActionsWidget extends BasicWidget {
             return;
         }
 
-        const { note: newNote } = await server.post(`attachments/${this.attachmentId}/convert-to-note`);
+
+        const { note: newNote } = await server.post<ReturnType<typeof attachmentsApiRoute.convertAttachmentToNote>>(`attachments/${this.attachmentId}/convert-to-note`);
         toastService.showMessage(t("attachments_actions.convert_success", { title: this.attachment.title }));
         await ws.waitForMaxKnownEntityChangeId();
         await appContext.tabManager.getActiveContext().setNote(newNote.noteId);