From 3ffd8e98bb2928a295532637322a07c20fad0290 Mon Sep 17 00:00:00 2001
From: Alec Gibson <12036746+alecgibson@users.noreply.github.com>
Date: Thu, 16 Dec 2021 16:58:54 +0000
Subject: [PATCH] =?UTF-8?q?=E2=9C=A8=20Add=20support=20for=20`invertWithDo?=
 =?UTF-8?q?c`=20for=20subtypes?=
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This change adds support for the [optional, but recommended][1]
`invertWithDoc(op, doc) -> op'` method, which is already implemented as
[`Delta.invert()`][2]

[1]: https://github.com/ottypes/docs#optional-properties
[2]: https://github.com/quilljs/delta/#invert
---
 lib/type.js | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/lib/type.js b/lib/type.js
index 9abd912..6454355 100644
--- a/lib/type.js
+++ b/lib/type.js
@@ -66,5 +66,11 @@ module.exports = {
         length: end - start,
       });
     },
+
+    invertWithDoc: function(delta, doc) {
+      delta = new Delta(delta);
+      doc = new Delta(doc);
+      return delta.invert(doc);
+    }
   }
 };