Optimize isText, isElement, isNodeList and isEditor (#5859)

* Remove the `isPlainObject` check from `isText` and `isElement` for performance

* Optimise `isElement`, `isNodeList` and `isText` further

* Update changeset

* Fix changeset

* Refactor object check into `isObject`

packages/slate-history/package.json

@@ -13,9 +13,6 @@
   "files": [
     "dist/"
   ],
-  "dependencies": {
-    "is-plain-object": "^5.0.0"
-  },
   "devDependencies": {
     "@babel/runtime": "^7.23.2",
     "lodash": "^4.17.21",

packages/slate-history/src/history.ts

@@ -1,5 +1,4 @@
-import { isPlainObject } from 'is-plain-object'
-import { Operation, Range } from 'slate'
+import { Operation, Range, isObject } from 'slate'
 
 interface Batch {
   operations: Operation[]
@@ -24,7 +23,7 @@ export const History = {
 
   isHistory(value: any): value is History {
     return (
-      isPlainObject(value) &&
+      isObject(value) &&
       Array.isArray(value.redos) &&
       Array.isArray(value.undos) &&
       (value.redos.length === 0 ||