Disabled usage of the POLYGON_MODE_LINE gpu feature in the examples (#14402)

Fixes #14353
Fixes #14371

---------

Signed-off-by: Sarthak Singh <sarthak.singh99@gmail.com>
Co-authored-by: Alice Cecile <alice.i.cecile@gmail.com>
Co-authored-by: BD103 <59022059+BD103@users.noreply.github.com>

Cargo.toml

@@ -753,7 +753,8 @@ doc-scrape-examples = true
 name = "Lines"
 description = "Create a custom material to draw 3d lines"
 category = "3D Rendering"
-wasm = true
+# WASM does not support the `POLYGON_MODE_LINE` feature.
+wasm = false
 
 [[example]]
 name = "ssao"

examples/2d/2d_shapes.rs

@@ -1,16 +1,26 @@
 //! Shows how to render simple primitive shapes with a single color.
+//!
+//! You can toggle wireframes with the space bar except on wasm. Wasm does not support
+//! `POLYGON_MODE_LINE` on the gpu.
 
+#[cfg(not(target_arch = "wasm32"))]
+use bevy::sprite::{Wireframe2dConfig, Wireframe2dPlugin};
 use bevy::{
     prelude::*,
-    sprite::{MaterialMesh2dBundle, Mesh2dHandle, Wireframe2dConfig, Wireframe2dPlugin},
+    sprite::{MaterialMesh2dBundle, Mesh2dHandle},
 };
 
 fn main() {
-    App::new()
-        .add_plugins((DefaultPlugins, Wireframe2dPlugin))
-        .add_systems(Startup, setup)
-        .add_systems(Update, toggle_wireframe)
-        .run();
+    let mut app = App::new();
+    app.add_plugins((
+        DefaultPlugins,
+        #[cfg(not(target_arch = "wasm32"))]
+        Wireframe2dPlugin,
+    ))
+    .add_systems(Startup, setup);
+    #[cfg(not(target_arch = "wasm32"))]
+    app.add_systems(Update, toggle_wireframe);
+    app.run();
 }
 
 const X_EXTENT: f32 = 900.;
@@ -57,6 +67,7 @@ fn setup(
         });
     }
 
+    #[cfg(not(target_arch = "wasm32"))]
     commands.spawn(
         TextBundle::from_section("Press space to toggle wireframes", TextStyle::default())
             .with_style(Style {
@@ -68,6 +79,7 @@ fn setup(
     );
 }
 
+#[cfg(not(target_arch = "wasm32"))]
 fn toggle_wireframe(
     mut wireframe_config: ResMut<Wireframe2dConfig>,
     keyboard: Res<ButtonInput<KeyCode>>,

examples/3d/3d_shapes.rs

@@ -1,11 +1,15 @@
 //! This example demonstrates the built-in 3d shapes in Bevy.
 //! The scene includes a patterned texture and a rotation for visualizing the normals and UVs.
+//!
+//! You can toggle wireframes with the space bar except on wasm. Wasm does not support
+//! `POLYGON_MODE_LINE` on the gpu.
 
 use std::f32::consts::PI;
 
+#[cfg(not(target_arch = "wasm32"))]
+use bevy::pbr::wireframe::{WireframeConfig, WireframePlugin};
 use bevy::{
     color::palettes::basic::SILVER,
-    pbr::wireframe::{WireframeConfig, WireframePlugin},
     prelude::*,
     render::{
         render_asset::RenderAssetUsages,
@@ -17,10 +21,18 @@ fn main() {
     App::new()
         .add_plugins((
             DefaultPlugins.set(ImagePlugin::default_nearest()),
+            #[cfg(not(target_arch = "wasm32"))]
             WireframePlugin,
         ))
         .add_systems(Startup, setup)
-        .add_systems(Update, (rotate, toggle_wireframe))
+        .add_systems(
+            Update,
+            (
+                rotate,
+                #[cfg(not(target_arch = "wasm32"))]
+                toggle_wireframe,
+            ),
+        )
         .run();
 }
 
@@ -128,6 +140,7 @@ fn setup(
         ..default()
     });
 
+    #[cfg(not(target_arch = "wasm32"))]
     commands.spawn(
         TextBundle::from_section("Press space to toggle wireframes", TextStyle::default())
             .with_style(Style {
@@ -174,6 +187,7 @@ fn uv_debug_texture() -> Image {
     )
 }
 
+#[cfg(not(target_arch = "wasm32"))]
 fn toggle_wireframe(
     mut wireframe_config: ResMut<WireframeConfig>,
     keyboard: Res<ButtonInput<KeyCode>>,