building examples now uses a wasm binary size optimized release build

docs/book/post_build.py

@@ -19,7 +19,7 @@ def build_and_copy_demo(category, md_name):
     name = md_name[:-3]
     example_dir = f"../../examples/{name}"
     if os.path.exists(example_dir):
-        p = subprocess.Popen(["trunk", "build"], cwd=example_dir)
+        p = subprocess.Popen(["trunk", "build", "--release"], cwd=example_dir)
         p.wait()
 
         example_output_path = os.path.join(example_dir, "dist")

examples/.cargo/config.toml

@@ -1,2 +1,6 @@
 [build]
-rustflags = ["--cfg=web_sys_unstable_apis"]
+rustflags = ["--cfg=web_sys_unstable_apis", "--cfg=has_std"]
+
+[unstable]
+build-std = ["std", "panic_abort", "core", "alloc"]
+build-std-features = ["panic_immediate_abort"]

examples/Cargo.toml

@@ -32,3 +32,19 @@ members = [
     "watch_pausable",
     "watch_throttled",
 ]
+
+[package]
+name = "leptos-use-examples"
+version = "0.3.3"
+edition = "2021"
+
+[profile.release]
+opt-level = 'z'
+lto = true
+codegen-units = 1
+panic = "abort"
+
+[lib]
+
+[package.metadata.leptos]
+lib-profile-release = "wasm-release"

examples/src/lib.rs

@@ -0,0 +1 @@
+// necessary to be able to specify a release profile in the workspace root Cargo.toml