analytcs

public/st.js

@@ -0,0 +1,29 @@
+(function() {
+  var d = document.currentScript && document.currentScript.getAttribute('data-domain');
+  if (!d) d = location.hostname;
+
+  function send(path, ref) {
+    var payload = {
+      domain: d,
+      path: path,
+      referrer: ref || document.referrer || ''
+    };
+    var url = '/api/st';
+    if (navigator.sendBeacon) {
+      navigator.sendBeacon(url, JSON.stringify(payload));
+    } else {
+      fetch(url, { method: 'POST', headers: { 'Content-Type': 'application/json' }, body: JSON.stringify(payload), keepalive: true });
+    }
+  }
+
+  send(location.pathname, document.referrer);
+
+  var _push = history.pushState;
+  history.pushState = function() {
+    _push.apply(history, arguments);
+    send(location.pathname, '');
+  };
+  window.addEventListener('popstate', function() {
+    send(location.pathname, '');
+  });
+})();