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fix edge case in singleton node creation

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This commit is contained in:
Hakim El Hattab 2014-05-07 22:02:05 +02:00
parent f31f0ffa70
commit c4e202cd0f
1 changed files with 16 additions and 8 deletions
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18
js/reveal.js
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@ -518,17 +518,25 @@
*/ */
function createSingletonNode( container, tagname, classname, innerHTML ) { function createSingletonNode( container, tagname, classname, innerHTML ) {
var node = container.querySelector( '.' + classname ); // Find all nodes matching the description
var nodes = container.querySelectorAll( '.' + classname );
// If no node was found or the node is inside another container // Check all matches to find one which is a direct child of
if( !node || node.parentNode !== container ) { // the specified container
node = document.createElement( tagname ); for( var i = 0; i < nodes.length; i++ ) {
var testNode = nodes[i];
if( testNode.parentNode === container ) {
return testNode;
}
}
// If no node was found, create it now
var node = document.createElement( tagname );
node.classList.add( classname ); node.classList.add( classname );
if( typeof innerHTML === 'string' ) { if( typeof innerHTML === 'string' ) {
node.innerHTML = innerHTML; node.innerHTML = innerHTML;
} }
container.appendChild( node ); container.appendChild( node );
}
return node; return node;