Enum DomMutation 

pub enum DomMutation<Id> {
    Inserted {
        node: Id,
        parent: Id,
    },
    Removed {
        node: Id,
        former_parent: Id,
    },
    AttributeChanged {
        node: Id,
        name: QualName,
        old_value: Option<String>,
    },
    CharacterDataChanged {
        node: Id,
    },
    SubtreeReplaced {
        node: Id,
    },
    Moved {
        node: Id,
        from_parent: Id,
        to_parent: Id,
    },
}

A recorded structural DOM mutation — render-state-free (no dirty bits, no style). Id is the implementor’s LayoutDom::NodeId.

Variants

Inserted

node was inserted under parent.

Fields

node: Id

parent: Id

Removed

node was removed from former_parent.

Fields

node: Id

former_parent: Id

AttributeChanged

The attribute named name was set or changed on node.

old_value is the attribute’s value before this change (None if the attribute was newly added). It is plain pre-mutation DOM data — not render state — and lets serval-layout reconstruct a Stylo ElementSnapshot at restyle time (the old value is gone from the live DOM by then). See docs/2026-05-25_fine_grained_restyle_plan.md.

Fields

node: Id

name: QualName

old_value: Option<String>

CharacterDataChanged

A text/comment node’s character data changed.

Fields

node: Id

SubtreeReplaced

node’s entire child subtree was replaced (e.g. via innerHTML).

Fields

node: Id

Moved

node moved atomically from from_parent to to_parent (possibly the same parent, reordered) with state preserved — the Node.moveBefore() contract (WHATWG DOM). Unlike a Removed + Inserted pair this promises the subtree never left the tree: consumers may keep per-node retained state (boxes, shaped text, focus, scroll) and treat the move as a splice/graft candidate rather than a teardown. A conservative consumer handles it exactly as removed-from + inserted-under. (docs/2026-07-05_movebefore_dom_standard_plan.md, S1.)

Fields

node: Id

from_parent: Id

to_parent: Id

Trait Implementations

impl<Id: Clone> Clone for DomMutation<Id>

fn clone(&self) -> DomMutation<Id>

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl<Id: Debug> Debug for DomMutation<Id>

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

Formats the value using the given formatter.

impl<Id: Eq> Eq for DomMutation<Id>

impl<Id: PartialEq> PartialEq for DomMutation<Id>

fn eq(&self, other: &DomMutation<Id>) -> bool

Equality operator ==.

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

Inequality operator !=.

impl<Id: PartialEq> StructuralPartialEq for DomMutation<Id>