dont make the browser hang

src/yuzu_cmd/emu_window/emu_window_sdl3.cpp

@@ -5,6 +5,9 @@
 // SPDX-License-Identifier: GPL-2.0-or-later
 
 #include <SDL3/SDL.h>
+#ifdef __EMSCRIPTEN__
+#include <emscripten.h>
+#endif
 
 #include "common/logging.h"
 #include "common/scm_rev.h"
@@ -29,6 +32,9 @@ EmuWindow_SDL3::EmuWindow_SDL3(InputCommon::InputSubsystem* input_subsystem_, Co
 }
 
 EmuWindow_SDL3::~EmuWindow_SDL3() {
+#ifdef __EMSCRIPTEN__
+    emscripten_cancel_main_loop();
+#endif
     system.HIDCore().UnloadInputDevices();
     input_subsystem->Shutdown();
     SDL_Quit();

src/yuzu_cmd/yuzu.cpp

@@ -8,6 +8,9 @@
 #include <memory>
 #include <regex>
 #include <string>
+#ifdef __EMSCRIPTEN__
+#include <emscripten.h>
+#endif
 
 #include <fmt/ostream.h>
 
@@ -446,9 +449,17 @@ int main(int argc, char** argv) {
     if (system.DebuggerEnabled()) {
         system.InitializeDebugger();
     }
-    while (emu_window->IsOpen()) {
+
+#ifdef __EMSCRIPTEN__
+    // Required so lambda fits snuggly into our "main loop"
+    static EmuWindow_SDL3* static_ems_emu_window = emu_window.get();
+    emscripten_set_main_loop([]() {
+        static_ems_emu_window->WaitEvent();
+    }, 0, 1);
+#else
+    while (emu_window->IsOpen())
         emu_window->WaitEvent();
-    }
+#endif
     system.DetachDebugger();
     void(system.Pause());
     system.ShutdownMainProcess();