Page/space export (Markdown & HTML, both via jsonToHtml -> generateHTML) crashed with
"Export failed:undefined" on any page carrying a `comment` mark. Root cause:
comment.renderHTML returned a LIVE DOM node (document.createElement + a click listener)
whenever a global `document` existed — and the in-process MCP module injects a jsdom
global.window+global.document into the Node server, defeating the old
`typeof document === "undefined"` guard. The server export runs happy-dom's
DOMSerializer, which crashes appending the foreign jsdom node
(NodeUtility.isInclusiveAncestor -> "Cannot read properties of undefined (reading
'length')"). comment is the only extension returning a live node.
Fix: widen the guard with an isNodeRuntime check (process.versions.node) so on any Node
runtime renderHTML returns the plain, serializable spec array — even when MCP injected
jsdom globals. The browser branch (createElement + click -> ACTIVE_COMMENT_EVENT) is
untouched, so in-editor comment interactivity is preserved (Vite defines only
process.env as a member-expression substitution, no `process` object in the browser
bundle, so isNodeRuntime is false there). The mcp schema mirror already returns a spec
array and is not on the export path (tiptapExtensions imports Comment from
@docmost/editor-ext), so no mirror change is needed.
Also: export-modal now reads the real error text from the response Blob
(responseType:'blob' made err.response.data.message always undefined) so a failed export
shows the server's message instead of "undefined".
Adds a regression test that runs the real jsonToHtml on a comment-marked doc with
jsdom globals injected (reproduces the crash on the unpatched code, passes after).
closes#298
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
agent_coder