[Webkit-unassigned] [Bug 257450] document.focus or window onblur not trigger util a mouse move or click user gesture happened when an url-scheme launch dialog shows

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=257450

--- Comment #1 from Jeason Xu <jeason.xu93 at gmail.com> ---
Here is demo code:
const launchSharingApp = (urlScheme) => {
  if (!urlScheme) return;
  const frameId = 'url-scheme-frame-id';
  let tempIframe = document.getElementById(frameId);
  if (!tempIframe) {
    tempIframe = document.createElement('iframe');
    tempIframe.id = frameId;
    tempIframe.style.display = 'none';
    document.body.appendChild(tempIframe);
  }
  tempIframe.contentWindow.location.href = urlScheme;
  setTimeout(() => {
    if (!document.hasFocus()) {
      /** if lost focus very fast, it means broswer's own confirm dialog shows.
       * User has no chance to touch other app */
      console.log('app installed');
    }
  }, 50);
};
launchSharingApp('...')

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