pick #286, export slim DOM options

src/utils.ts

@@ -15,7 +15,7 @@ import {
   scrollData,
   inputData,
 } from './types';
-import { INode } from 'rrweb-snapshot';
+import { INode, IGNORED_NODE } from 'rrweb-snapshot';
 
 export function on(
   type: string,
@@ -197,6 +197,15 @@ export function isBlocked(node: Node | null, blockClass: blockClass): boolean {
   return isBlocked(node.parentNode, blockClass);
 }
 
+export function isIgnored(n: Node | INode): boolean {
+  if ('__sn' in n) {
+    return (n as INode).__sn.id === IGNORED_NODE;
+  }
+  // The main part of the slimDOM check happens in
+  // rrweb-snapshot::serializeNodeWithId
+  return false;
+}
+
 export function isAncestorRemoved(target: INode): boolean {
   const id = mirror.getId(target);
   if (!mirror.has(id)) {