Externalise @speedcurve

Author: csswizardry

_layouts/default.html

@@ -106,31 +106,4 @@
     }
   </script>
 
-  <script type=module>
-
-    (() => {
-      // Bail out if SpeedCurve is not available.
-      if (!window.LUX || typeof window.LUX.addData !== 'function') return;
-
-      const obs = window.obs || Object.create(null);
-
-      // Keys we intend to send. Keep in sync with obs.js
-      const keys = [
-        'dataSaver',
-        'rttBucket',
-        'rttCategory',
-        'downlinkBucket',
-        'downlinkMax',
-        'batteryCritical',
-        'batteryLow',
-        'batteryCharging',
-      ];
-
-      for (const key of keys) {
-        if (Object.prototype.hasOwnProperty.call(obs, key)) {
-          window.LUX.addData(key, obs[key]);
-        }
-      }
-    })();
-
-  </script>
+  <script src=/js/speedcurve.js type=module></script>

js/speedcurve.js

@@ -0,0 +1,30 @@
+/**
+ * All the data previously captured by Obs.js is now sent to SpeedCurve!
+ *
+ * I ❤️ SpeedCurve!
+ */
+
+(() => {
+  // Bail out if SpeedCurve is not available.
+  if (!window.LUX || typeof window.LUX.addData !== 'function') return;
+
+  const obs = window.obs || Object.create(null);
+
+  // Keys we intend to send. Keep in sync with obs.js
+  const keys = [
+    'dataSaver',
+    'rttBucket',
+    'rttCategory',
+    'downlinkBucket',
+    'downlinkMax',
+    'batteryCritical',
+    'batteryLow',
+    'batteryCharging',
+  ];
+
+  for (const key of keys) {
+    if (Object.prototype.hasOwnProperty.call(obs, key)) {
+      window.LUX.addData(key, obs[key]);
+    }
+  }
+})();