Form Resubmission App Launch Test

How to test:
  1. Open this page in Chrome Incognito on iOS/Android.
  2. Tap one of the buttons below to submit a POST request to an external domain.
  3. Once the external page loads (it might show an error like HTTP 405 Method Not Allowed), Pull to Refresh or tap the Reload button in the browser.
  4. Chrome should present a "Confirm form resubmission" dialog.
  5. Tap Continue.
  6. Observe if the browser unexpectedly launches the native app (e.g., WhatsApp, Facebook, Google) instead of simply reloading the page, due to Universal Links being triggered upon resubmission.

1. WhatsApp (Auto POST)

Automatically POSTs to https://wa.me/1234567890 upon loading

2. Facebook (Auto POST)

Automatically POSTs to https://www.facebook.com/ upon loading

3. Google (Auto POST)

Automatically POSTs to https://www.google.com/ upon loading

4. Local (Control - Auto POST)

Automatically POSTs to target.html upon loading