Backport PR #12027: fix run cells breaking on non-header markdown cel…

…ls (#12405) Co-authored-by: Andrew Fulton <andrewfulton9@gmail.com>
jupyterlab · Apr 14, 2022 · 161614c · 161614c
1 parent da92d1c
commit 161614c
Showing 1 changed file with 5 additions and 1 deletion.
diff --git a/packages/toc-extension/src/index.ts b/packages/toc-extension/src/index.ts
@@ -109,7 +109,11 @@ async function activateTOC(
         let level = activeCell.headingInfo.level;
         for (let i = cells.indexOf(activeCell) + 1; i < cells.length; i++) {
           const cell = cells[i];
-          if (cell instanceof MarkdownCell && cell.headingInfo.level <= level) {
+          if (
+            cell instanceof MarkdownCell &&
+            cell.headingInfo.level <= level &&
+            cell.headingInfo.level > -1
+          ) {
             break;
           }
           if (cell instanceof CodeCell) {