Fix #205: guard splitLines() when server HTML has no newlines so renumber runs

2026-09-10 13:12:52 -05:00
parent 348f792c73
commit 555e5b30be
1 changed files with 7 additions and 0 deletions
@@ -20,6 +20,13 @@
  // box per line, which would shift every following number down one row (#167).
  function splitLines() {
    var html = body.innerHTML;
+    if (html.indexOf('\n') < 0) {
+      // No newline text nodes to split on (already joined in the server
+      // template or stripped upstream): blocks are already adjacent, so
+      // leave the DOM alone. Splitting here would clone the whole markup
+      // into one block and leave renumber() reading stale nodes (#205).
+      return;
+    }
    var parts = html.split('\n');
    var out = [];
    for (var i = 0; i < parts.length; i++) {