1 files changed, 8 insertions, 7 deletions

diff --git a/src/render_loop.rs b/src/render_loop.rs
index 9b8d8f5..5a5e21a 100644
--- a/src/render_loop.rs
+++ b/src/render_loop.rs
@@ -1,6 +1,7 @@
 use std::cell::RefCell;
 use std::rc::Rc;
 
+use log::error;
 use wasm_bindgen::prelude::*;
 
 pub struct RenderLoop {
@@ -8,11 +9,9 @@ pub struct RenderLoop {
 }
 
 impl RenderLoop {
-    fn request_animation_frame(f: &Closure<dyn FnMut(f64)>) {
-        web_sys::window()
-            .expect("no window")
-            .request_animation_frame(f.as_ref().unchecked_ref())
-            .expect("should register `requestAnimationFrame` OK");
+    fn request_animation_frame(f: &Closure<dyn FnMut(f64)>) -> Result<(), JsValue> {
+        web_sys::window().ok_or("no window")?.request_animation_frame(f.as_ref().unchecked_ref())?;
+        Ok(())
     }
 
     pub fn new<T: FnMut(f64) -> bool + 'static>(mut fun: T) -> Self {
@@ -21,14 +20,16 @@ impl RenderLoop {
 
         *inner.borrow_mut() = Closure::new(move |t| {
             if fun(t) {
-                Self::request_animation_frame(&rloop.borrow());
+                if let Err(e) = Self::request_animation_frame(&rloop.borrow()) {
+                    error!("couldn't request animation frame: {:?}", e);
+                }
             }
         });
         Self { inner }
     }
 
     pub fn start(&self) -> Result<(), JsValue> {
-        Self::request_animation_frame(&self.inner.borrow());
+        Self::request_animation_frame(&self.inner.borrow())?;
         Ok(())
     }
 }