tests: test_html5: test emscripten_set_element_style

tests/test_html5.c

@@ -421,6 +421,8 @@ int main()
   emscripten_get_screen_size(&width, &height);
   printf("Current screen size: %dx%d\n", width, height);
 
+  emscripten_set_element_style("canvas", "cursor", "crosshair");
+
   /* For the events to function, one must either call emscripten_set_main_loop or enable Module.noExitRuntime by some other means.
      Otherwise the application will exit after leaving main(), and the atexit handlers will clean up all event hooks (by design). */
   EM_ASM(noExitRuntime = true);