fix(analytics): serve umami via /trace/trace.js and add privacy policy with opt-out switch (#71)

services/docs/assets/js/core/telemetry.js

@@ -0,0 +1,36 @@
+(function () {
+  var KEY = "umami.disabled";
+  var toggles = document.querySelectorAll("[data-umami-toggle]");
+  if (!toggles.length) return;
+
+  function sync() {
+    var enabled = true;
+    try {
+      enabled = window.localStorage.getItem(KEY) !== "1";
+    } catch (e) {}
+    toggles.forEach(function (el) {
+      el.checked = enabled;
+    });
+  }
+
+  sync();
+
+  toggles.forEach(function (el) {
+    el.addEventListener("change", function () {
+      try {
+        if (el.checked) {
+          window.localStorage.removeItem(KEY);
+        } else {
+          window.localStorage.setItem(KEY, "1");
+        }
+      } catch (e) {}
+      sync();
+    });
+  });
+
+  window.addEventListener("storage", function (e) {
+    if (e.key === KEY || e.key === null) {
+      sync();
+    }
+  });
+})();