diff options
Diffstat (limited to 'js/reveal.js')
| -rw-r--r-- | js/reveal.js | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/js/reveal.js b/js/reveal.js index 310672d..621a85b 100644 --- a/js/reveal.js +++ b/js/reveal.js @@ -749,7 +749,7 @@ var Reveal = (function(){ // If we were on a vertical stack, remember what vertical index // it was on so we can resume at the same position when returning - if( previousSlide && previousSlide.parentNode.classList.contains( 'stack' ) ) { + if( previousSlide && previousSlide.parentNode && previousSlide.parentNode.classList.contains( 'stack' ) ) { setPreviousVerticalIndex( previousSlide.parentNode, indexv ); } |