fix: update clipboard text on going back to tab

Author: mrcaidev

src/use-clipboard-text.ts

@@ -79,7 +79,11 @@ export function useClipboardText(options: UseClipboardTextOptions = {}) {
   useDocumentEventListener("cut", read);
   useDocumentEventListener("copy", read);
 
-  // TODO: Visibility change event listener
+  useDocumentEventListener("visibilitychange", (_, document) => {
+    if (document.visibilityState === "visible") {
+      read();
+    }
+  });
 
   return {
     /**

tests/use-clipboard-text.test.ts

@@ -3,6 +3,7 @@ import { useClipboardText } from "src";
 
 const mockReadText = vi.fn();
 const mockWriteText = vi.fn();
+const mockVisibilityState = vi.spyOn(document, "visibilityState", "get");
 
 beforeAll(() => {
   vi.stubGlobal("navigator", {
@@ -125,6 +126,32 @@ it("listens to copy events", async () => {
   expect(mockReadText).toHaveBeenCalledTimes(2);
 });
 
+it("refreshes clipboard text when the user goes back to the tab", async () => {
+  mockReadText.mockResolvedValueOnce("hello").mockResolvedValueOnce("world");
+  mockVisibilityState.mockReturnValue("visible");
+
+  const { result } = renderHook(() => useClipboardText());
+  await waitFor(() => expect(result.current.text).not.toEqual(""));
+
+  expect(result.current.text).toEqual("hello");
+  expect(result.current.error).toEqual(null);
+  expect(mockReadText).toHaveBeenCalledTimes(1);
+
+  mockVisibilityState.mockReturnValue("hidden");
+  await act(async () => fireEvent(document, new Event("visibilitychange")));
+
+  expect(result.current.text).toEqual("hello");
+  expect(result.current.error).toEqual(null);
+  expect(mockReadText).toHaveBeenCalledTimes(1);
+
+  mockVisibilityState.mockReturnValue("visible");
+  await act(async () => fireEvent(document, new Event("visibilitychange")));
+
+  expect(result.current.text).toEqual("world");
+  expect(result.current.error).toEqual(null);
+  expect(mockReadText).toHaveBeenCalledTimes(2);
+});
+
 it("recovers from error after any successful read", async () => {
   mockReadText
     .mockRejectedValueOnce(new Error("error"))