Struct NodeDataExt 

#[repr(C)]
pub struct NodeDataExt {
    pub attributes: AttributeTypeVec,
    pub virtual_view: Option<VirtualViewNode>,
    pub dataset: Option<RefAny>,
    pub svg_data: Option<SvgNodeData>,
    pub menu_bar: Option<Box<Menu>>,
    pub context_menu: Option<Box<Menu>>,
    pub key: Option<u64>,
    pub marker: Option<AzString>,
    pub dataset_merge_callback: Option<DatasetMergeCallback>,
    pub component_origin: Option<ComponentOrigin>,
    pub animation_callbacks: Vec<AnimationFunction>,
}

NOTE: NOT EXPOSED IN THE API! Stores extra, not commonly used information for the NodeData. This helps keep the primary NodeData struct smaller for common cases.

Fields

attributes: AttributeTypeVec

Strongly-typed HTML attributes (aria-*, href, alt, etc.) IDs and classes are stored as AttributeType::Id and AttributeType::Class entries. Moved from NodeData to save 48B for the ~95% of nodes with no attributes.

virtual_view: Option<VirtualViewNode>

VirtualView callback data, only set when node_type == NodeType::VirtualView.

dataset: Option<RefAny>

data-* attributes for this node, useful to store UI-related data on the node itself.

svg_data: Option<SvgNodeData>

SVG-specific data or raster clip mask for this DOM node.

menu_bar: Option<Box<Menu>>

Menu bar that should be displayed at the top of this nodes rect.

context_menu: Option<Box<Menu>>

Context menu that should be opened when the item is left-clicked.

key: Option<u64>

Stable key for reconciliation. If provided, allows the framework to track this node across frames even if its position in the array changes. This is crucial for correct lifecycle events when lists are reordered.

marker: Option<AzString>

App-chosen MARKER string, resolvable to this node’s (DomId, NodeId) via CallbackInfo::get_node_id_by_marker. The clean spelling of the “find that other widget from this callback” jump: the app mints a unique string at build time (a UUID, a counter — anything unique in the window), stamps it on the node AND keeps it in whatever dataset the jumping callback holds. Replaces the old get_node_id_of_root_dataset search, which needed an EMPTY instance of the target’s private dataset type just to name it — coupling the caller to widget internals the architecture forbids it from seeing. Unlike an Id attribute, a marker is invisible to CSS matching.

dataset_merge_callback: Option<DatasetMergeCallback>

Callback to merge dataset state from a previous frame’s node into the current node. This enables heavy resource preservation (video decoders, GL textures) across frames.

component_origin: Option<ComponentOrigin>

Tracks which component rendered this DOM subtree. Set by the framework during component rendering — the root node(s) of a component’s output DOM get stamped with the component’s qualified name. Enables the debugger to reconstruct the component invocation tree from the flat rendered DOM, and enables code generation roundtrips.

animation_callbacks: Vec<AnimationFunction>

COMPONENT-ATTACHED presence-animation functions, resolvable by NAME from this node’s -azul-animation-in / -azul-animation-out (after stylesheet @keyframes — the web mechanism stays the only default name source). This replaced the global AppConfig registry (USER ruling 2026-08-17): a sidebar widget ships its fly-out next to its own DOM, not in app-global state.

Trait Implementations

impl Clone for NodeDataExt

fn clone(&self) -> NodeDataExt

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for NodeDataExt

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

Formats the value using the given formatter.

impl Default for NodeDataExt

fn default() -> NodeDataExt

Returns the “default value” for a type.

impl Eq for NodeDataExt

impl Hash for NodeDataExt

fn hash<H: Hasher>(&self, state: &mut H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl Ord for NodeDataExt

fn cmp(&self, other: &Self) -> Ordering

This method returns an Ordering between self and other.

fn max(self, other: Self) -> Self

where Self: Sized,

Compares and returns the maximum of two values.

fn min(self, other: Self) -> Self

where Self: Sized,

Compares and returns the minimum of two values.

fn clamp(self, min: Self, max: Self) -> Self

where Self: Sized,

Restrict a value to a certain interval.

fn clamp_to<R>(self, range: R) -> Self

where Self: Sized, R: ClampBounds<Self>,

🔬This is a nightly-only experimental API. (clamp_to)

Restrict a value to a certain range.

impl PartialEq for NodeDataExt

fn eq(&self, other: &Self) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl PartialOrd for NodeDataExt

fn partial_cmp(&self, other: &Self) -> Option<Ordering>

This method returns an ordering between self and other values if one exists.

fn lt(&self, other: &Rhs) -> bool

Tests less than (for self and other) and is used by the < operator.

fn le(&self, other: &Rhs) -> bool

Tests less than or equal to (for self and other) and is used by the <= operator.

fn gt(&self, other: &Rhs) -> bool

Tests greater than (for self and other) and is used by the > operator.

fn ge(&self, other: &Rhs) -> bool

Tests greater than or equal to (for self and other) and is used by the >= operator.