Struct NodeMeta 

pub struct NodeMeta<Msg> {
    pub class: Option<String>,
    pub on_click: Option<Msg>,
    pub on_input: Option<OnInput<Msg>>,
    pub on_toggle: Option<OnToggle<Msg>>,
    pub ai: AiMeta,
    pub data_appfront_id: Option<u64>,
    pub is_dynamic: bool,
    pub attrs: Vec<(String, String)>,
    pub key: Option<String>,
    pub virtual_scroll: Option<VirtualScroll>,
}

Fields

class: Option<String>

on_click: Option<Msg>

on_input: Option<OnInput<Msg>>

See OnInput. Not serializable — a live closure can’t survive SSR/hydration JSON, and SSR/AI-schema rendering never needs to call it, only know an input exists. Currently only tpt-appfront-dom wires this into a real oninput listener; tpt-appfront-canvas/tpt-appfront-tui don’t consume it yet.

on_toggle: Option<OnToggle<Msg>>

See OnToggle. Two-way binding for Checkbox nodes; not serializable, same reasoning as on_input.

ai: AiMeta

data_appfront_id: Option<u64>

Stable identifier assigned before SSR so the client hydrator can match server-rendered DOM nodes back to their UITree counterpart.

is_dynamic: bool

Whether the subtree this node roots was produced by a #[tpt_appfront_core::component] function whose body reads any Signal. false (the default) means either the node wasn’t produced by the macro, or the macro’s static analysis found no signal reads in the function body. Backends can use this as a hint to skip hydration/listener work for subtrees that never change (see Phase 9 islands hydration).

attrs: Vec<(String, String)>

Arbitrary key/value attributes rendered verbatim by backends. Used for accessibility (role, aria-*, tabindex), semantic landmarks (aria-label, role="navigation"), and any backend-specific attribute that has no first-class NodeMeta field. Serialized as-is, so values must be String (no closures). Backends render these as DOM attributes (HTML/SSR), and ignore the ones they don’t model (canvas/TUI).

key: Option<String>

Stable identity for reconciliation, e.g. a row/entity id. Set via NodeRef::key on items inside a NodeKind::List/NodeKind::DataGrid so backends can diff add/remove/reorder against a previous render instead of rebuilding every child from scratch.

virtual_scroll: Option<VirtualScroll>

Windowed-rendering config for List/DataGrid nodes — see VirtualScroll. None (the default) means render every item.

Trait Implementations

impl<Msg: Clone> Clone for NodeMeta<Msg>

fn clone(&self) -> NodeMeta<Msg>

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl<Msg: Debug> Debug for NodeMeta<Msg>

Manual impl since on_input’s Rc<dyn Fn(String) -> Msg> can’t derive Debug (trait objects for Fn don’t implement it) — every other field still prints normally, on_input prints as a presence marker.

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl<Msg> Default for NodeMeta<Msg>

fn default() -> Self

Returns the “default value” for a type.

impl<'de, Msg> Deserialize<'de> for NodeMeta<Msg>

where Msg: Deserialize<'de>,

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl<Msg> Serialize for NodeMeta<Msg>

where Msg: Serialize,

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.