diff --git a/dom/point/point.ts b/dom/point/point.ts
index 4935c0fd07..8b46caf2c4 100644
--- a/dom/point/point.ts
+++ b/dom/point/point.ts
@@ -70,6 +70,14 @@ namespace $ {
 		tail() {
 			return $mol_dom_point.tail( this.node )
 		}
+
+		native() {
+			if( this.is_tail() ) return [
+				this.node.parentNode!,
+				[ ... this.node.parentNode!.childNodes ].indexOf( this.node as ChildNode ),
+			] as const
+			return [ this.node, this.pos ] as const
+		}
 		
 		/** Point near the node. -1: before, +1: after. */
 		static near( node: Node, axis: -1 | 1 ) {
diff --git a/dom/range/range.ts b/dom/range/range.ts
index 311a40ff27..ae126c75f7 100644
--- a/dom/range/range.ts
+++ b/dom/range/range.ts
@@ -53,17 +53,25 @@ namespace $ {
 		}
 
 		point_compare( point: $mol_dom_point ) {
-			if( point.is_tail() ) return this.native().comparePoint(
-				point.node.parentNode!,
-				[ ... point.node.parentNode!.childNodes ].indexOf( point.node as ChildNode ),
-			)
-			else return this.native().comparePoint( point.node, point.pos )
+			return this.native().comparePoint( ... point.native() )
+		}
+		
+		point_bound( point: $mol_dom_point ) {
+			const zone = this.point_compare( point )
+			return zone < 0 ? this.anchor : zone > 0 ? this.extend : point
 		}
 		
 		range_contains( range: $mol_dom_range ) {
 			return ( this.point_compare( range.anchor ) === 0 )&&( this.point_compare( range.extend ) === 0 )
 		}
 
+		range_bounds( range: $mol_dom_range ) {
+			return new $mol_dom_range(
+				this.point_bound( range.anchor ),
+				this.point_bound( range.extend ),
+			)
+		}
+
 		select() {
 			const sel = $mol_dom_context.document.getSelection()!
 			sel.removeAllRanges()