Add ability to reset the mapping id, to facilitate destructor in rrweb (rrwebRecord.stop) (#49)

src/index.ts

@@ -2,6 +2,7 @@ import snapshot, {
   serializeNodeWithId,
   transformAttribute,
   visitSnapshot,
+  cleanupSnapshot,
   IGNORED_NODE,
 } from './snapshot';
 import rebuild, { buildNodeWithSN, addHoverClass } from './rebuild';
@@ -15,5 +16,6 @@ export {
   addHoverClass,
   transformAttribute,
   visitSnapshot,
+  cleanupSnapshot,
   IGNORED_NODE,
 };

src/snapshot.ts

@@ -570,4 +570,9 @@ export function visitSnapshot(
   walk(node);
 }
 
+export function cleanupSnapshot() {
+  // allow a new recording to start numbering nodes from scratch
+  _id = 1;
+}
+
 export default snapshot;