guide: Add bool example to supported types section

examples/guide-supported-types-examples/bool.js

@@ -0,0 +1,9 @@
+import {
+  take_char_by_value,
+  return_char,
+} from './guide_supported_types_examples';
+
+take_bool_by_value(true);
+
+let b = return_bool();
+console.log(typeof b); // "boolean"

examples/guide-supported-types-examples/src/bool.rs

@@ -0,0 +1,9 @@
+use wasm_bindgen::prelude::*;
+
+#[wasm_bindgen]
+pub fn take_bool_by_value(x: bool) {}
+
+#[wasm_bindgen]
+pub fn return_bool() -> bool {
+    true
+}

examples/guide-supported-types-examples/src/lib.rs

@@ -8,3 +8,4 @@ pub mod exported_types;
 pub mod str;
 pub mod string;
 pub mod char;
+pub mod bool;

guide/src/reference/types.md

@@ -109,6 +109,18 @@ garbage-collected heap and the Wasm linear memory with `TextDecoder` and
 |:---:|:---:|:---:|:---:|:---:|:---:|:---:|
 | Yes | No | No | Yes | No | No | A JavaScript boolean value |
 
+### Example Rust Usage
+
+```rust
+{{#include ../../../examples/guide-supported-types-examples/src/bool.rs}}
+```
+
+### Example JavaScript Usage
+
+```js
+{{#include ../../../examples/guide-supported-types-examples/bool.js}}
+```
+
 ## `wasm_bindgen::JsValue`
 
 | `T` parameter | `&T` parameter | `&mut T` parameter | `T` return value | `Option<T>` parameter | `Option<T>` return value | JavaScript representation |