Invoke Intents

intents.html

<script type="text/javascript">
(function() {
  if (window.__twitterIntentHandler) return;
  var intentRegex = /twitter\.com(\:\d{2,4})?\/intent\/(\w+)/,
      windowOptions = 'scrollbars=yes,resizable=yes,toolbar=no,location=yes',
      width = 550,
      height = 420,
      winHeight = screen.height,
      winWidth = screen.width;

  function handleIntent(e) {
    e = e || window.event;
    var target = e.target || e.srcElement,
        m, left, top;

    while (target && target.nodeName.toLowerCase() !== 'a') {
      target = target.parentNode;
    }

    if (target && target.nodeName.toLowerCase() === 'a' && target.href) {
      m = target.href.match(intentRegex);
      if (m) {
        left = Math.round((winWidth / 2) - (width / 2));
        top = 0;

        if (winHeight > height) {
          top = Math.round((winHeight / 2) - (height / 2));
        }

        window.open(target.href, 'intent', windowOptions + ',width=' + width +
                                           ',height=' + height + ',left=' + left + ',top=' + top);
        e.returnValue = false;
        e.preventDefault && e.preventDefault();
      }
    }
  }

  if (document.addEventListener) {
    document.addEventListener('click', handleIntent, false);
  } else if (document.attachEvent) {
    document.attachEvent('onclick', handleIntent);
  }
  window.__twitterIntentHandler = true;
}());
</script>

This snippet of Javascript readies the browser environment to detect anchor tags with hrefs pointing to Twitter Web Intents.

Include the above SCRIPT tag at the end of your HTML page. Somewhere above the SCRIPT tag, include a simple anchor tag pointing to one of the valid Web Intent URLs.

For example:
@twitterapi

When links that match the Web Intents patterns are clicked, this SCRIPT will create a pop-up window for that interaction to complete.