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null check background

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This commit is contained in:
Hakim El Hattab 2014-04-28 12:31:34 +02:00
parent 1391253cb8
commit fbf999ec81
1 changed files with 23 additions and 19 deletions
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42
js/reveal.js
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@ -2326,29 +2326,31 @@
// Show the corresponding background element
var indices = getIndices( slide );
var background = getSlideBackground( indices.h, indices.v );
background.style.display = 'block';
if( background ) {
background.style.display = 'block';
// If the background contains media, load it
if( background.hasAttribute( 'data-loaded' ) === false ) {
background.setAttribute( 'data-loaded', 'true' );
// If the background contains media, load it
if( background.hasAttribute( 'data-loaded' ) === false ) {
background.setAttribute( 'data-loaded', 'true' );
var backgroundImage = slide.getAttribute( 'data-background-image' ),
backgroundVideo = slide.getAttribute( 'data-background-video' );
var backgroundImage = slide.getAttribute( 'data-background-image' ),
backgroundVideo = slide.getAttribute( 'data-background-video' );
// Images
if( backgroundImage ) {
background.style.backgroundImage = 'url('+ backgroundImage +')';
}
// Videos
else if ( backgroundVideo ) {
var video = document.createElement( 'video' );
// Images
if( backgroundImage ) {
background.style.backgroundImage = 'url('+ backgroundImage +')';
}
// Videos
else if ( backgroundVideo ) {
var video = document.createElement( 'video' );
// Support comma separated lists of video sources
backgroundVideo.split( ',' ).forEach( function( source ) {
video.innerHTML += '<source src="'+ source +'">';
} );
// Support comma separated lists of video sources
backgroundVideo.split( ',' ).forEach( function( source ) {
video.innerHTML += '<source src="'+ source +'">';
} );
background.appendChild( video );
background.appendChild( video );
}
}
}
@ -2366,7 +2368,9 @@
// Hide the corresponding background element
var indices = getIndices( slide );
var background = getSlideBackground( indices.h, indices.v );
background.style.display = 'none';
if( background ) {
background.style.display = 'none';
}
}