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null check parentNode in case slide has been detached

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This commit is contained in:
Hakim El Hattab
2012-11-13 21:08:04 -05:00
parent ad54b07a84
commit d9371e21a0
2 changed files with 3 additions and 3 deletions
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2
js/reveal.js
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@@ -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 );
}

4
js/reveal.min.js vendored
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