Why the editor autosave was silently failing

A null prototype and a content-dependent bug

tobi · July 21, 2026 · 1 min read

The symptom

Autosave failed only when the document contained a heading.

const source = editorRef.current?.getJSON() ?? props.initialDoc
const doc = JSON.parse(JSON.stringify(source)) as RillDoc

ProseMirror builds node attrs with a null prototype, and React only serializes plain objects as data.

Why the editor autosave was silently failing · Rill