diff --git a/docs/example_wasm.js b/docs/example_wasm.js
index baab8cf0..c6b91057 100644
--- a/docs/example_wasm.js
+++ b/docs/example_wasm.js
@@ -219,12 +219,12 @@ function __wbg_adapter_32(arg0, arg1, arg2) {
     wasm._dyn_core__ops__function__FnMut__A____Output___R_as_wasm_bindgen__closure__WasmClosure___describe__invoke__h22fd33d9f501a695(arg0, arg1, addHeapObject(arg2));
 }
 
-function __wbg_adapter_35(arg0, arg1, arg2) {
-    wasm._dyn_core__ops__function__FnMut__A____Output___R_as_wasm_bindgen__closure__WasmClosure___describe__invoke__h22fd33d9f501a695(arg0, arg1, addHeapObject(arg2));
+function __wbg_adapter_35(arg0, arg1) {
+    wasm._dyn_core__ops__function__FnMut_____Output___R_as_wasm_bindgen__closure__WasmClosure___describe__invoke__h5402719cc6dde927(arg0, arg1);
 }
 
-function __wbg_adapter_38(arg0, arg1) {
-    wasm._dyn_core__ops__function__FnMut_____Output___R_as_wasm_bindgen__closure__WasmClosure___describe__invoke__h5402719cc6dde927(arg0, arg1);
+function __wbg_adapter_38(arg0, arg1, arg2) {
+    wasm._dyn_core__ops__function__FnMut__A____Output___R_as_wasm_bindgen__closure__WasmClosure___describe__invoke__h22fd33d9f501a695(arg0, arg1, addHeapObject(arg2));
 }
 
 function __wbg_adapter_41(arg0, arg1, arg2) {
@@ -725,28 +725,28 @@ async function init(input) {
         var ret = wasm.memory;
         return addHeapObject(ret);
     };
+    imports.wbg.__wbindgen_closure_wrapper387 = function(arg0, arg1, arg2) {
+        var ret = makeMutClosure(arg0, arg1, 74, __wbg_adapter_26);
+        return addHeapObject(ret);
+    };
     imports.wbg.__wbindgen_closure_wrapper383 = function(arg0, arg1, arg2) {
-        var ret = makeMutClosure(arg0, arg1, 72, __wbg_adapter_41);
+        var ret = makeMutClosure(arg0, arg1, 74, __wbg_adapter_32);
+        return addHeapObject(ret);
+    };
+    imports.wbg.__wbindgen_closure_wrapper380 = function(arg0, arg1, arg2) {
+        var ret = makeMutClosure(arg0, arg1, 74, __wbg_adapter_38);
         return addHeapObject(ret);
     };
     imports.wbg.__wbindgen_closure_wrapper385 = function(arg0, arg1, arg2) {
-        var ret = makeMutClosure(arg0, arg1, 72, __wbg_adapter_35);
+        var ret = makeMutClosure(arg0, arg1, 74, __wbg_adapter_29);
         return addHeapObject(ret);
     };
-    imports.wbg.__wbindgen_closure_wrapper375 = function(arg0, arg1, arg2) {
-        var ret = makeMutClosure(arg0, arg1, 72, __wbg_adapter_38);
-        return addHeapObject(ret);
-    };
-    imports.wbg.__wbindgen_closure_wrapper376 = function(arg0, arg1, arg2) {
-        var ret = makeMutClosure(arg0, arg1, 72, __wbg_adapter_26);
-        return addHeapObject(ret);
-    };
-    imports.wbg.__wbindgen_closure_wrapper381 = function(arg0, arg1, arg2) {
-        var ret = makeMutClosure(arg0, arg1, 72, __wbg_adapter_29);
+    imports.wbg.__wbindgen_closure_wrapper389 = function(arg0, arg1, arg2) {
+        var ret = makeMutClosure(arg0, arg1, 74, __wbg_adapter_41);
         return addHeapObject(ret);
     };
     imports.wbg.__wbindgen_closure_wrapper379 = function(arg0, arg1, arg2) {
-        var ret = makeMutClosure(arg0, arg1, 72, __wbg_adapter_32);
+        var ret = makeMutClosure(arg0, arg1, 74, __wbg_adapter_35);
         return addHeapObject(ret);
     };
 
diff --git a/docs/example_wasm_bg.wasm b/docs/example_wasm_bg.wasm
new file mode 100644
index 00000000..35961b2a
Binary files /dev/null and b/docs/example_wasm_bg.wasm differ
diff --git a/egui/src/containers/window.rs b/egui/src/containers/window.rs
index a7c3a307..a0a70f59 100644
--- a/egui/src/containers/window.rs
+++ b/egui/src/containers/window.rs
@@ -77,6 +77,16 @@ impl<'open> Window<'open> {
         self
     }
 
+    pub fn default_width(mut self, default_width: f32) -> Self {
+        self.resize = self.resize.default_width(default_width);
+        self
+    }
+
+    pub fn default_height(mut self, default_height: f32) -> Self {
+        self.resize = self.resize.default_height(default_height);
+        self
+    }
+
     pub fn default_rect(self, rect: Rect) -> Self {
         self.default_pos(rect.min).default_size(rect.size())
     }
diff --git a/example_wasm/src/lib.rs b/example_wasm/src/lib.rs
index 4f4c5cd6..774960e1 100644
--- a/example_wasm/src/lib.rs
+++ b/example_wasm/src/lib.rs
@@ -1,7 +1,7 @@
 #![deny(warnings)]
 #![warn(clippy::all)]
 
-use egui::{label, Align, Layout, TextStyle};
+use egui::{label, TextStyle};
 
 use wasm_bindgen::prelude::*;
 
@@ -25,17 +25,12 @@ pub struct MyApp {
     frames_painted: u64,
 }
 
-impl egui_web::App for MyApp {
-    fn ui(&mut self, ui: &mut egui::Ui, backend: &mut egui_web::Backend, info: &egui_web::WebInfo) {
-        self.example_app.ui(ui, &info.web_location_hash);
-
-        let mut ui = ui.centered_column(ui.available().width().min(480.0));
-        ui.set_layout(Layout::vertical(Align::Min));
-        ui.add(label!("Egui!").text_style(TextStyle::Heading));
+impl MyApp {
+    fn window_ui(&mut self, ui: &mut egui::Ui, backend: &mut egui_web::Backend) {
         ui.label("Egui is an immediate mode GUI written in Rust, compiled to WebAssembly, rendered with WebGL.");
         ui.label(
-            "Everything you see is rendered as textured triangles. There is no DOM. There are no HTML elements."
-        );
+                "Everything you see is rendered as textured triangles. There is no DOM. There are no HTML elements."
+            );
         ui.label("This is not JavaScript. This is Rust, running at 60 FPS. This is the web page, reinvented with game tech.");
         ui.label("This is also work in progress, and not ready for production... yet :)");
         ui.horizontal(|ui| {
@@ -82,3 +77,15 @@ impl egui_web::App for MyApp {
         ui.label(format!("Total frames painted: {}", self.frames_painted));
     }
 }
+
+impl egui_web::App for MyApp {
+    fn ui(&mut self, ui: &mut egui::Ui, backend: &mut egui_web::Backend, info: &egui_web::WebInfo) {
+        egui::Window::new("Egui")
+            .default_width(500.0)
+            .show(ui.ctx(), |ui| {
+                self.window_ui(ui, backend);
+            });
+
+        self.example_app.ui(ui, &info.web_location_hash);
+    }
+}