feat: add support for checking for attributes in extendMarkRange

packages/core/src/helpers/getDebugJSON.ts

@@ -0,0 +1,31 @@
+import { Node as ProseMirrorNode } from 'prosemirror-model'
+
+/**
+ * Returns a node tree with node positions.
+ */
+export default function getDebugJSON(node: ProseMirrorNode) {
+  const debug = (startNode: ProseMirrorNode, startOffset = 0) => {
+    const nodes: any[] = []
+
+    startNode.forEach((n, offset) => {
+      const from = startOffset + offset
+      const to = from + n.nodeSize
+
+      nodes.push({
+        type: n.type.name,
+        attrs: { ...n.attrs },
+        from,
+        to,
+        marks: n.marks.map(mark => ({
+          type: mark.type.name,
+          attrs: { ...mark.attrs },
+        })),
+        content: debug(n, from + 1),
+      })
+    })
+
+    return nodes
+  }
+
+  return debug(node)
+}