Limit devicemotion and deviceorientation to Android devices only …

…(UA) (#15)

CHANGELOG.md

@@ -1,5 +1,9 @@
 # changelog
 
+## Unreleased
+
+* Fix `deviceorientation` and `devicemotion` deprecation warnings in Firefox browsers on desktop.
+
 ## 0.1.8
 **Date**: 2024-06-20
 

src/signals/collect.ts

@@ -28,6 +28,14 @@ const M = Math;
  */
 let ssig: Signals | undefined;
 
+/**
+ * Returns true if the browser is an Android device based on the user agent string (very naively).
+ * @internal 
+ */
+function isAndroidUA() {
+  return /Android/i.test(navigator.userAgent);
+}
+
 /**
  * Computes rolling stats of a variable.
  * Retrigger continuously resets the timer when subsequent "on" events happen.
@@ -350,6 +358,13 @@ export class Signals {
       g: false,
     };
 
+    if (!isAndroidUA()) {
+      // We limit this signal to Android phones, which is generally the only place where we would expect to get
+      // this data anyhow.
+      return sig;
+    }
+
+
     window[x]("devicemotion", (e) => {
       sig.ts = e.timeStamp;
       sig.i = e.interval;
@@ -382,6 +397,12 @@ export class Signals {
       bd: bd.s,
     };
 
+    if (!isAndroidUA()) {
+      // We limit this signal to Android phones, which is generally the only place where we would expect to get
+      // this data anyhow.
+      return sig;
+    }
+
     let hasPrevious: true | undefined;
     window[x]("deviceorientation", (e) => {
       if (e.gamma == null || e.beta == null || e.alpha == null) return;