merge

docs/api/locations/range-ref.md

@@ -0,0 +1,22 @@
+# RangeRef
+
+`RangeRef` objects keep a specific range in a document synced over time as new operations are applied to the editor. You can access their property `current` at any time for the up-to-date `Range` value.
+
+```typescript
+interface RangeRef {
+  current: Range | null
+  affinity: 'forward' | 'backward' | 'outward' | 'inward' | null
+  unref(): Range | null
+}
+```
+
+- [Static methods](range-ref.md#static-methods)
+  - [Transform methods](range-ref.md#transform-methods)
+
+## Static methods
+
+### Transform methods
+
+#### `RangeRef.transform(ref: RangeRef, op: Operation)`
+
+Transform the range refs current value by an `op`.