check if mark has attributes

packages/core/src/utils/markHasAttributes.ts

@@ -0,0 +1,9 @@
+import { EditorState } from 'prosemirror-state'
+import { MarkType } from 'prosemirror-model'
+import getMarkAttrs from './getMarkAttrs'
+
+export default function markHasAttributes(state: EditorState, type: MarkType, attrs?: Object) {
+  return attrs === null || JSON.stringify(attrs) === JSON.stringify(
+    getMarkAttrs(state, type),
+  )
+}