Leptos Knowledge Patch Skill

Leptos Knowledge Patch

Covers Leptos 0.8.8–0.8.17 (2024-08-26 through 2025-03-01). Claude Opus 4.6 knows Leptos through 0.6.x. It is unaware of the features below.

Index

| Topic | Reference | Key features | |---|---|---| | Components & views | references/components-and-views.md | <ShowLet>, <Show> signal support | | Server functions | references/server-functions.md | Bitcode encoding option |

`<ShowLet>` Component (0.8.8)

New component for unwrapping Option values — similar to <Show> but provides the inner value to children:

<ShowLet
    when=move || some_option.get()
    fallback=|| view! { <p>"Nothing here"</p> }
    let:value
>
    <p>"Got: " {value}</p>
</ShowLet>

`<Show>` Accepts Signals Directly (0.8.8)

<Show when=...> now accepts signals in addition to closures:

let visible = RwSignal::new(true);
// Before: <Show when=move || visible.get()>
// Now also: <Show when=visible>

`Bitcode` Encoding for Server Functions (0.8.11)

New Bitcode encoding option for server function IO, alongside existing Json, Cbor, etc. Requires the bitcode feature on server_fn.

#[server(endpoint = "my_fn", encoding = "Bitcode")]
pub async fn my_server_fn(data: MyData) -> Result<MyResponse, ServerFnError> {
    // ...
}

Reference Files

| File | Contents | |---|---| | components-and-views.md | <ShowLet> component, <Show> signal support | | server-functions.md | Bitcode encoding for server functions |

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