diff options
| -rw-r--r-- | components/script/dom/node.rs | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/components/script/dom/node.rs b/components/script/dom/node.rs index dfe91b6e17e..9143677d1e0 100644 --- a/components/script/dom/node.rs +++ b/components/script/dom/node.rs @@ -428,6 +428,7 @@ pub trait NodeHelpers { fn type_id(self) -> NodeTypeId; fn len(self) -> u32; + fn index(self) -> u32; fn parent_node(self) -> Option<Temporary<Node>>; fn first_child(self) -> Option<Temporary<Node>>; @@ -579,6 +580,11 @@ impl<'a> NodeHelpers for JSRef<'a, Node> { } } + // https://dom.spec.whatwg.org/#concept-tree-index + fn index(self) -> u32 { + self.preceding_siblings().count() as u32 + } + fn parent_node(self) -> Option<Temporary<Node>> { self.parent_node.get().map(Temporary::from_rooted) } |