Struct HtmlHeadingElement 

pub struct HtmlHeadingElement(/* private fields */);

A heading element (<h1> through <h6>).

Chrome equivalent: HTMLHeadingElement. One type for all 6 levels. The actual level is determined by the runtime tag name, not the const TAG_NAME.

Implementations

impl HtmlHeadingElement

pub fn level(&self) -> u8

pub fn set_level(&self, value: impl Into<u8>)

impl HtmlHeadingElement

pub fn heading_level(&self) -> u8

Get the heading level from the tag name.

Returns 1-6 based on the actual runtime tag. Falls back to the stored level data.

Trait Implementations

impl Clone for HtmlHeadingElement

fn clone(&self) -> HtmlHeadingElement

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl ContainerNode for HtmlHeadingElement

fn append(&self, child: impl HasHandle)

Append child as the last child of this node.

fn child(self, child: impl HasHandle) -> Self

Append a child and return self for chaining (GPUI-style).

fn add_children<I, C>(self, items: I) -> Self

where I: IntoIterator<Item = C>, C: HasHandle,

Append multiple children at once.

fn insert_before(&self, child: impl HasHandle)

Insert child before this node in the parent’s child list.

fn first_child(&self) -> Option<Handle>

Get the first child, or None if empty.

fn last_child(&self) -> Option<Handle>

Get the last child, or None if empty.

fn children(&self) -> Vec<Handle>

Collect all children as Handles.

impl Debug for HtmlHeadingElement

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

Formats the value using the given formatter.

impl Element for HtmlHeadingElement

const TAG_NAME: &'static str = ""

The default tag name (e.g., "div", "button", "input").

const IS_FOCUSABLE: bool = false

Whether this element is focusable by default.

type Data = HeadingData

Element-specific data type (e.g., ButtonData). Use () if none.

fn from_handle(handle: Handle) -> Self

Wrap a raw Handle into this element’s typed handle.

fn tag_name(&self) -> &'static str

Get the tag name (runtime — reads from ElementData).

fn id(&self) -> String

Get the id attribute.

fn set_id(&self, id: impl Into<String>)

Set the id attribute.

fn class_name(&self) -> String

Get the class attribute.

fn set_class_name(&self, class: impl Into<String>)

Set the class attribute.

fn class_add(&self, name: &str)

Add a CSS class. No-op if already present. Chrome: element.classList.add("name").

fn class_remove(&self, name: &str)

Remove a CSS class. No-op if absent. Chrome: element.classList.remove("name").

fn class_toggle(&self, name: &str) -> bool

Toggle a CSS class. Returns true if now present. Chrome: element.classList.toggle("name").

fn class_contains(&self, name: &str) -> bool

Check if an element has a CSS class. Chrome: element.classList.contains("name").

fn attribute(&self, name: &str) -> Option<String>

Returns the attribute value for name, or None if absent.

fn set_attribute(&self, name: &str, value: impl Into<String>)

Set an attribute.

fn remove_attribute(&self, name: &str) -> Option<String>

Remove an attribute. Returns the old value.

impl EventTarget for HtmlHeadingElement

fn on<E: Event>( &self, callback: impl FnMut(&E, &EventContext) + 'static, ) -> ListenerId

Add a typed event listener. Returns an ID for removal.

fn on_with_options<E: Event>( &self, callback: impl FnMut(&E, &EventContext) + 'static, options: ListenerOptions, ) -> ListenerId

Add a listener with explicit options.

fn on_capture<E: Event>( &self, callback: impl FnMut(&E, &EventContext) + 'static, ) -> ListenerId

Add a capture-phase listener.

fn on_once<E: Event>( &self, callback: impl FnMut(&E, &EventContext) + 'static, ) -> ListenerId

Add a one-shot listener that auto-removes after first call.

fn off(&self, id: ListenerId)

Remove a listener by its ID.

fn dispatch_event(&self, event: &dyn Event) -> bool

Dispatch an event to this target.

impl HasHandle for HtmlHeadingElement

fn handle(&self) -> Handle

Get the inner Handle for this node/target.

impl Node for HtmlHeadingElement

fn is_alive(&self) -> bool

Check if this node is still alive in the document.

fn parent(&self) -> Option<Handle>

Get the parent node, or None if this is the root or detached.

fn next_sibling(&self) -> Option<Handle>

Get the next sibling in the parent’s child list.

fn prev_sibling(&self) -> Option<Handle>

Get the previous sibling in the parent’s child list.

fn detach(&self)

Detach this node from its parent. The node stays alive but is no longer in the tree.

fn destroy(&self)

Destroy this node. Frees the slot — all handles to it become stale.

fn raw(&self) -> RawId

Get the raw ID for cross-thread communication.

fn node_kind(&self) -> Option<NodeType>

Get the DOM node type (Element, Text, Document, etc.).

fn is_element(&self) -> bool

Is this an element node?

fn is_text(&self) -> bool

Is this a text node?

fn is_document(&self) -> bool

Is this the document root?

fn style(&self) -> StyleAccess

Per-property style access — like JavaScript’s element.style.

fn styled(self, f: impl FnOnce(&mut StyleAccess)) -> Self

Apply styles via closure and return self for chaining.

impl Copy for HtmlHeadingElement