diff --git a/demo.html b/demo.html
index adaef1cb..01a57472 100644
--- a/demo.html
+++ b/demo.html
@@ -421,6 +421,11 @@ Reveal.addEventListener( 'customevent', function() {
center: true,
hash: true,
+ // parallaxBackgroundImage: "https://s3.amazonaws.com/hakim-static/reveal-js/reveal-parallax-1.jpg",
+
+ // Parallax background size
+ // parallaxBackgroundSize: "2100px 900px",
+
transition: 'slide', // none/fade/slide/convex/concave/zoom
// More info https://github.com/hakimel/reveal.js#dependencies
diff --git a/js/controllers/backgrounds.js b/js/controllers/backgrounds.js
index 03970fe3..8328fe1a 100644
--- a/js/controllers/backgrounds.js
+++ b/js/controllers/backgrounds.js
@@ -12,6 +12,14 @@ export default class Backgrounds {
}
+ render() {
+
+ this.element = document.createElement( 'div' );
+ this.element.className = 'backgrounds';
+ this.Reveal.getRevealElement().appendChild( this.element );
+
+ }
+
/**
* Creates the slide background elements and appends them
* to the background container. One element is created per
@@ -20,16 +28,15 @@ export default class Backgrounds {
create() {
let printMode = this.Reveal.isPrintingPDF();
- let backgroundElement = this.Reveal.getBackgroundsElement();
// Clear prior backgrounds
- backgroundElement.innerHTML = '';
- backgroundElement.classList.add( 'no-transition' );
+ this.element.innerHTML = '';
+ this.element.classList.add( 'no-transition' );
// Iterate over all horizontal slides
this.Reveal.getHorizontalSlides().forEach( slideh => {
- let backgroundStack = this.createBackground( slideh, backgroundElement );
+ let backgroundStack = this.createBackground( slideh, this.element );
// Iterate over all vertical slides
toArray( slideh.querySelectorAll( 'section' ) ).forEach( slidev => {
@@ -45,10 +52,10 @@ export default class Backgrounds {
// Add parallax background if specified
if( this.Reveal.getConfig().parallaxBackgroundImage ) {
- backgroundElement.style.backgroundImage = 'url("' + this.Reveal.getConfig().parallaxBackgroundImage + '")';
- backgroundElement.style.backgroundSize = this.Reveal.getConfig().parallaxBackgroundSize;
- backgroundElement.style.backgroundRepeat = this.Reveal.getConfig().parallaxBackgroundRepeat;
- backgroundElement.style.backgroundPosition = this.Reveal.getConfig().parallaxBackgroundPosition;
+ this.element.style.backgroundImage = 'url("' + this.Reveal.getConfig().parallaxBackgroundImage + '")';
+ this.element.style.backgroundSize = this.Reveal.getConfig().parallaxBackgroundSize;
+ this.element.style.backgroundRepeat = this.Reveal.getConfig().parallaxBackgroundRepeat;
+ this.element.style.backgroundPosition = this.Reveal.getConfig().parallaxBackgroundPosition;
// Make sure the below properties are set on the element - these properties are
// needed for proper transitions to be set on the element via CSS. To remove
@@ -61,7 +68,7 @@ export default class Backgrounds {
}
else {
- backgroundElement.style.backgroundImage = '';
+ this.element.style.backgroundImage = '';
this.Reveal.getRevealElement().classList.remove( 'has-parallax-background' );
}
@@ -221,7 +228,6 @@ export default class Backgrounds {
update( includeAll = false ) {
let currentSlide = this.Reveal.getCurrentSlide();
- let backgroundElement = this.Reveal.getBackgroundsElement();
let indices = this.Reveal.getIndices();
let currentBackground = null;
@@ -232,7 +238,7 @@ export default class Backgrounds {
// Update the classes of all backgrounds to match the
// states of their slides (past/present/future)
- toArray( backgroundElement.childNodes ).forEach( ( backgroundh, h ) => {
+ toArray( this.element.childNodes ).forEach( ( backgroundh, h ) => {
backgroundh.classList.remove( 'past', 'present', 'future' );
@@ -303,7 +309,7 @@ export default class Backgrounds {
let previousBackgroundHash = this.previousBackground ? this.previousBackground.getAttribute( 'data-background-hash' ) : null;
let currentBackgroundHash = currentBackground.getAttribute( 'data-background-hash' );
if( currentBackgroundHash && currentBackgroundHash === previousBackgroundHash && currentBackground !== this.previousBackground ) {
- backgroundElement.classList.add( 'no-transition' );
+ this.element.classList.add( 'no-transition' );
}
this.previousBackground = currentBackground;
@@ -325,7 +331,7 @@ export default class Backgrounds {
// Allow the first background to apply without transition
setTimeout( () => {
- backgroundElement.classList.remove( 'no-transition' );
+ this.element.classList.remove( 'no-transition' );
}, 1 );
}
@@ -336,7 +342,6 @@ export default class Backgrounds {
*/
updateParallax() {
- let backgroundElement = this.Reveal.getBackgroundsElement();
let indices = this.Reveal.getIndices();
if( this.Reveal.getConfig().parallaxBackgroundImage ) {
@@ -344,7 +349,7 @@ export default class Backgrounds {
let horizontalSlides = this.Reveal.getHorizontalSlides(),
verticalSlides = this.Reveal.getVerticalSlides();
- let backgroundSize = backgroundElement.style.backgroundSize.split( ' ' ),
+ let backgroundSize = this.element.style.backgroundSize.split( ' ' ),
backgroundWidth, backgroundHeight;
if( backgroundSize.length === 1 ) {
@@ -355,7 +360,7 @@ export default class Backgrounds {
backgroundHeight = parseInt( backgroundSize[1], 10 );
}
- let slideWidth = backgroundElement.offsetWidth,
+ let slideWidth = this.element.offsetWidth,
horizontalSlideCount = horizontalSlides.length,
horizontalOffsetMultiplier,
horizontalOffset;
@@ -369,7 +374,7 @@ export default class Backgrounds {
horizontalOffset = horizontalOffsetMultiplier * indices.h * -1;
- let slideHeight = backgroundElement.offsetHeight,
+ let slideHeight = this.element.offsetHeight,
verticalSlideCount = verticalSlides.length,
verticalOffsetMultiplier,
verticalOffset;
@@ -383,7 +388,7 @@ export default class Backgrounds {
verticalOffset = verticalSlideCount > 0 ? verticalOffsetMultiplier * indices.v : 0;
- backgroundElement.style.backgroundPosition = horizontalOffset + 'px ' + -verticalOffset + 'px';
+ this.element.style.backgroundPosition = horizontalOffset + 'px ' + -verticalOffset + 'px';
}
diff --git a/js/reveal.js b/js/reveal.js
index 70310701..44e009b3 100644
--- a/js/reveal.js
+++ b/js/reveal.js
@@ -223,8 +223,8 @@ export default function( revealElement, options ) {
dom.wrapper.classList.remove( 'no-hover' );
}
- // Background element
- dom.background = createSingletonNode( dom.wrapper, 'div', 'backgrounds', null );
+ // Slide backgrounds
+ backgrounds.render();
// Progress bar
dom.progress = createSingletonNode( dom.wrapper, 'div', 'progress', '' );
@@ -2787,7 +2787,6 @@ export default function( revealElement, options ) {
// Returns reveal.js DOM elements
getRevealElement: () => dom.wrapper || document.querySelector( '.reveal' ),
getSlidesElement: () => dom.slides,
- getBackgroundsElement: () => dom.background,
// Checks if reveal.js has been loaded and is ready for use
isReady: () => ready,