Added doctest for spreading option

Author: sfisol

crates/vertigo/src/fetch/lazy_cache.rs

@@ -264,7 +264,7 @@ impl<T: PartialEq + Clone> LazyCache<T> {
 }
 
 impl<T: JsJsonDeserialize> LazyCache<T> {
-    /// Helper to easily create a lazy cache of Vec<T> deserialized from provided URL base and route
+    /// Helper to easily create a lazy cache of `Vec<T>` deserialized from provided URL base and route
     ///
     /// ```rust
     /// use vertigo::{Computed, LazyCache, RequestBuilder, AutoJsJson, Resource};

crates/vertigo/src/lib.rs

@@ -294,6 +294,8 @@ pub use log;
 
 /// Allows to create [DomNode] using HTML tags.
 ///
+/// Simple DOM with a param embedded:
+///
 /// ```rust
 /// use vertigo::dom;
 ///
@@ -306,6 +308,24 @@ pub use log;
 ///     </div>
 /// };
 /// ```
+///
+/// Mapping and embedding an `Option`:
+///
+/// ```rust
+/// use vertigo::dom;
+///
+/// let name = "John";
+/// let occupation = Some("Lumberjack");
+///
+/// dom! {
+///     <div>
+///         <h3>"Hello " {name} "!"</h3>
+///         {..occupation.map(|occupation| dom! { <p>"Occupation: " {occupation}</p> })}
+///     </div>
+/// };
+/// ```
+///
+/// Note the spread operator which utilizes the fact that `Option` is iterable in Rust.
 pub use vertigo_macro::dom;
 
 /// Allows to create [DomElement] using HTML tags.

crates/vertigo/src/tests/dom/list_spread.rs

@@ -3,8 +3,7 @@ use crate::{self as vertigo, DomNode};
 
 #[test]
 fn children_from_iter() {
-    let list = (0..10)
-        .map(|i| dom! { <li>{i}</li> });
+    let list = (0..10).map(|i| dom! { <li>{i}</li> });
 
     let node = dom! {
         <ul>
@@ -35,3 +34,22 @@ fn children_from_iter_inline() {
 
     assert_eq!(node.get_children().len(), 11);
 }
+
+#[test]
+fn iter_option() {
+    let some_label = Some("Label".to_string());
+    let none_label = Option::<String>::None;
+
+    let node = dom! {
+        <div>
+            {..some_label}
+            {..none_label}
+        </div>
+    };
+
+    let DomNode::Node { node } = node else {
+        panic!("Expected DomNode::Node")
+    };
+
+    assert_eq!(node.get_children().len(), 1);
+}