v0.2.91

static/js/collaboration-session.js

@@ -105,10 +105,15 @@ export class CollaborationSession {
     const replacements = mergeOwnerReplacements([], ownerReplacements);
     if (!hasTextEffect(operation) && !replacements.length) return null;
 
-    const localLength = this.localDocument().content.length;
+    const localLength = this.buffer
+      ? operationTargetLength(this.buffer.operation)
+      : this.outstanding
+        ? operationTargetLength(this.outstanding.operation)
+        : this.serverContent.length;
     if (operationBaseLength(operation) !== localLength) {
       throw new Error("Local operation base length does not match the collaborative document");
     }
+    const targetLength = operationTargetLength(operation);
 
     if (!this.buffer) {
       this.buffer = pendingEnvelope(this.clientId, this.nextUpdateId++, operation, replacements);
@@ -117,7 +122,7 @@ export class CollaborationSession {
       this.buffer.ownerReplacements = mergeOwnerReplacements(this.buffer.ownerReplacements, replacements);
     }
 
-    if (operationTargetLength(this.buffer.operation) !== this.localDocument().content.length) {
+    if (operationTargetLength(this.buffer.operation) !== targetLength) {
       throw new Error("Buffered operation target length does not match the collaborative document");
     }
     return this.buffer;