add replaceRange command

packages/core/src/commands/replaceRange.ts

@@ -0,0 +1,23 @@
+import { NodeType } from 'prosemirror-model'
+import getNodeType from '../helpers/getNodeType'
+import { Command, Range, AnyObject } from '../types'
+
+/**
+ * Replaces text with a node within a range.
+ */
+export const replaceRange = (range: Range, typeOrName: string | NodeType, attributes: AnyObject = {}): Command => ({ tr, state, dispatch }) => {
+  const type = getNodeType(typeOrName, state.schema)
+  const { from, to } = range
+  const $from = tr.doc.resolve(from)
+  const index = $from.index()
+
+  if (!$from.parent.canReplaceWith(index, index, type)) {
+    return false
+  }
+
+  if (dispatch) {
+    tr.replaceWith(from, to, type.create(attributes))
+  }
+
+  return true
+}