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Description
The notebookOutlineEntryFactory.ts handles markdown headers with HTML tags, but not other parts (such as collapsing mardown header cells, see foldingModel.ts).
const fullContent = cell.getText().substring(0, 10000);
for (const { depth, text } of getMarkdownHeadersInCell(fullContent)) {
hasHeader = true;
entries.push(new OutlineEntry(index++, depth, cell, text, false, false));
}
if (!hasHeader) {
// no markdown syntax headers, try to find html tags
const match = fullContent.match(/<h([1-6]).*>(.*)<\/h\1>/i);
if (match) {
hasHeader = true;
const level = parseInt(match[1]);
const text = match[2].trim();
entries.push(new OutlineEntry(index++, level, cell, text, false, false));
}
}Thus, if we have HTML tags for outline headers, then we do not render collapsible regions in markdown for such headers.
Not sure if this is a bug or not, but filing this here,
Feel free to close this if this is invalid.