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better null check for stack (closes #354)

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This commit is contained in:
Hakim El Hattab 2013-03-04 17:01:49 -05:00
parent 3bae233289
commit 0926be9781
2 changed files with 4 additions and 4 deletions
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4
js/reveal.js
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@ -718,7 +718,7 @@ var Reveal = (function(){
*/
function setPreviousVerticalIndex( stack, v ) {
if( stack ) {
if( typeof stack === 'object' && typeof stack.setAttribute === 'function' ) {
stack.setAttribute( 'data-previous-indexv', v || 0 );
}
@ -733,7 +733,7 @@ var Reveal = (function(){
*/
function getPreviousVerticalIndex( stack ) {
if( stack && stack.classList.contains( 'stack' ) ) {
if( typeof stack === 'object' && typeof stack.setAttribute === 'function' && stack.classList.contains( 'stack' ) ) {
return parseInt( stack.getAttribute( 'data-previous-indexv' ) || 0, 10 );
}

4
js/reveal.min.js vendored
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