fix(whatsapp): use api.whatsapp.com for share links

PR #459 and follow-up issue #575 both point to the same platform change: WhatsApp now handles desktop and mobile share handoff through api.whatsapp.com. Stop branching between web and api hosts and cover the generated URL in a regression test.

Author: nygardk

.changeset/dirty-planes-heal.md

@@ -0,0 +1,5 @@
+---
+'react-share': patch
+---
+
+Use `api.whatsapp.com` for generated WhatsApp share links, following the behavior proposed in PR #459 and requested again in issue #575.

src/WhatsappShareButton.ts

@@ -2,16 +2,10 @@ import assert from './utils/assert';
 import objectToGetParams from './utils/objectToGetParams';
 import createShareButton from './hocs/createShareButton';
 
-function isMobileOrTablet() {
-  return /(android|iphone|ipad|mobile)/i.test(navigator.userAgent);
-}
-
 function whatsappLink(url: string, { title, separator }: { title?: string; separator?: string }) {
   assert(url, 'whatsapp.url');
   return (
-    'https://' +
-    (isMobileOrTablet() ? 'api' : 'web') +
-    '.whatsapp.com/send' +
+    'https://api.whatsapp.com/send' +
     objectToGetParams({
       text: title ? title + separator + url : url,
     })

test/WhatsappShareButton.test.tsx

@@ -0,0 +1,25 @@
+import React from 'react';
+import { fireEvent, render, screen } from '@testing-library/react';
+import { describe, expect, it, vi } from 'vitest';
+
+import WhatsappShareButton from '../src/WhatsappShareButton';
+
+describe('WhatsappShareButton', () => {
+  it('uses the api host for generated share links', () => {
+    const openSpy = vi.spyOn(window, 'open').mockReturnValue(null);
+
+    render(
+      <WhatsappShareButton title="Example" url="https://example.com">
+        Share to WhatsApp
+      </WhatsappShareButton>,
+    );
+
+    fireEvent.click(screen.getByRole('button', { name: 'Share to WhatsApp' }));
+
+    expect(openSpy).toHaveBeenCalledWith(
+      'https://api.whatsapp.com/send?text=Example%20https%3A%2F%2Fexample.com',
+      '',
+      expect.any(String),
+    );
+  });
+});