--- a/crates/eframe/src/web/app_runner.rs
+++ b/crates/eframe/src/web/app_runner.rs
@@ -188,6 +188,7 @@ impl AppRunner {
     /// The result can be painted later with a call to [`Self::run_and_paint`] or [`Self::paint`].
     pub fn logic(&mut self) {
         let canvas_size = super::canvas_size_in_points(self.canvas(), self.egui_ctx());
+        log::info!("canvas_size: {canvas_size:?}");
         let raw_input = self.input.new_frame(canvas_size);
 
         let full_output = self.egui_ctx.run(raw_input, |egui_ctx| {