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start moving to es6

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This commit is contained in:
Hakim El Hattab 2020-03-05 20:32:35 +01:00
parent 4b888d87b7
commit 556d6ec93d
1 changed files with 95 additions and 96 deletions
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187
js/reveal.js
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@ -19,27 +19,27 @@
// Browser globals. // Browser globals.
root.Reveal = factory(); root.Reveal = factory();
} }
}( this, function() { }( this || window, () => {
'use strict'; 'use strict';
var Reveal; let Reveal;
// The reveal.js version // The reveal.js version
var VERSION = '4.0.0-dev'; const VERSION = '4.0.0-dev';
var SLIDES_SELECTOR = '.slides section', const SLIDES_SELECTOR = '.slides section';
HORIZONTAL_SLIDES_SELECTOR = '.slides>section', const HORIZONTAL_SLIDES_SELECTOR = '.slides>section';
VERTICAL_SLIDES_SELECTOR = '.slides>section.present>section', const VERTICAL_SLIDES_SELECTOR = '.slides>section.present>section';
HOME_SLIDE_SELECTOR = '.slides>section:first-of-type', const HOME_SLIDE_SELECTOR = '.slides>section:first-of-type';
UA = navigator.userAgent, const UA = navigator.userAgent;
// Methods that may not be invoked via the postMessage API // Methods that may not be invoked via the postMessage API
POST_MESSAGE_METHOD_BLACKLIST = /registerPlugin|registerKeyboardShortcut|addKeyBinding|addEventListener/, const POST_MESSAGE_METHOD_BLACKLIST = /registerPlugin|registerKeyboardShortcut|addKeyBinding|addEventListener/;
// Configuration defaults, can be overridden at initialization time // Configuration defaults, can be overridden at initialization time
config = { let config = {
// The "normal" size of the presentation, aspect ratio will be preserved // The "normal" size of the presentation, aspect ratio will be preserved
// when the presentation is scaled to fit different resolutions // when the presentation is scaled to fit different resolutions
@ -497,7 +497,7 @@
( navigator.platform === 'MacIntel' && navigator.maxTouchPoints > 1 ); // iPadOS ( navigator.platform === 'MacIntel' && navigator.maxTouchPoints > 1 ); // iPadOS
isChrome = /chrome/i.test( UA ) && !/edge/i.test( UA ); isChrome = /chrome/i.test( UA ) && !/edge/i.test( UA );
var testElement = document.createElement( 'div' ); let testElement = document.createElement( 'div' );
features.transforms3d = 'perspective' in testElement.style; features.transforms3d = 'perspective' in testElement.style;
features.transforms2d = 'transform' in testElement.style; features.transforms2d = 'transform' in testElement.style;
@ -528,7 +528,7 @@
var scripts = [], var scripts = [],
scriptsToLoad = 0; scriptsToLoad = 0;
config.dependencies.forEach( function( s ) { config.dependencies.forEach( s => {
// Load if there's no condition or the condition is truthy // Load if there's no condition or the condition is truthy
if( !s.condition || s.condition() ) { if( !s.condition || s.condition() ) {
if( s.async ) { if( s.async ) {
@ -544,7 +544,7 @@
scriptsToLoad = scripts.length; scriptsToLoad = scripts.length;
// Load synchronous scripts // Load synchronous scripts
scripts.forEach( function( s ) { scripts.forEach( s => {
loadScript( s.src, function() { loadScript( s.src, function() {
if( typeof s.callback === 'function' ) s.callback(); if( typeof s.callback === 'function' ) s.callback();
@ -2130,19 +2130,18 @@
dom.overlay.classList.add( 'overlay-preview' ); dom.overlay.classList.add( 'overlay-preview' );
dom.wrapper.appendChild( dom.overlay ); dom.wrapper.appendChild( dom.overlay );
dom.overlay.innerHTML = [ dom.overlay.innerHTML =
'<header>', `<header>
'<a class="close" href="#"><span class="icon"></span></a>', <a class="close" href="#"><span class="icon"></span></a>
'<a class="external" href="'+ url +'" target="_blank"><span class="icon"></span></a>', <a class="external" href="${url}" target="_blank"><span class="icon"></span></a>
'</header>', </header>
'<div class="spinner"></div>', <div class="spinner"></div>
'<div class="viewport">', <div class="viewport">
'<iframe src="'+ url +'"></iframe>', <iframe src="${url}"></iframe>
'<small class="viewport-inner">', <small class="viewport-inner">
'<span class="x-frame-error">Unable to load iframe. This is likely due to the site\'s policy (x-frame-options).</span>', <span class="x-frame-error">Unable to load iframe. This is likely due to the site's policy (x-frame-options).</span>
'</small>', </small>
'</div>' </div>`;
].join('');
dom.overlay.querySelector( 'iframe' ).addEventListener( 'load', function( event ) { dom.overlay.querySelector( 'iframe' ).addEventListener( 'load', function( event ) {
dom.overlay.classList.add( 'loaded' ); dom.overlay.classList.add( 'loaded' );
@ -2203,35 +2202,35 @@
html += '<table><th>KEY</th><th>ACTION</th>'; html += '<table><th>KEY</th><th>ACTION</th>';
for( var key in keyboardShortcuts ) { for( var key in keyboardShortcuts ) {
html += '<tr><td>' + key + '</td><td>' + keyboardShortcuts[ key ] + '</td></tr>'; html += `<tr><td>${key}</td><td>${keyboardShortcuts[ key ]}</td></tr>`;
} }
// Add custom key bindings that have associated descriptions // Add custom key bindings that have associated descriptions
for( var binding in registeredKeyBindings ) { for( var binding in registeredKeyBindings ) {
if( registeredKeyBindings[binding].key && registeredKeyBindings[binding].description ) { if( registeredKeyBindings[binding].key && registeredKeyBindings[binding].description ) {
html += '<tr><td>' + registeredKeyBindings[binding].key + '</td><td>' + registeredKeyBindings[binding].description + '</td></tr>'; html += `<tr><td>${registeredKeyBindings[binding].key}</td><td>${registeredKeyBindings[binding].description}</td></tr>`;
} }
} }
html += '</table>'; html += '</table>';
dom.overlay.innerHTML = [ dom.overlay.innerHTML = `
'<header>', <header>
'<a class="close" href="#"><span class="icon"></span></a>', <a class="close" href="#"><span class="icon"></span></a>
'</header>', </header>
'<div class="viewport">', <div class="viewport">
'<div class="viewport-inner">'+ html +'</div>', <div class="viewport-inner">${html}</div>
'</div>' </div>
].join(''); `;
dom.overlay.querySelector( '.close' ).addEventListener( 'click', function( event ) { dom.overlay.querySelector( '.close' ).addEventListener( 'click', function( event ) {
closeOverlay(); closeOverlay();
event.preventDefault(); event.preventDefault();
}, false ); }, false );
setTimeout( function() { requestAnimationFrame( function() {
dom.overlay.classList.add( 'visible' ); dom.overlay.classList.add( 'visible' );
}, 1 ); } );
} }
@ -2581,8 +2580,8 @@
*/ */
function updateOverview() { function updateOverview() {
var vmin = Math.min( window.innerWidth, window.innerHeight ); const vmin = Math.min( window.innerWidth, window.innerHeight );
var scale = Math.max( vmin / 5, 150 ) / vmin; const scale = Math.max( vmin / 5, 150 ) / vmin;
transformSlides( { transformSlides( {
overview: [ overview: [
@ -3840,14 +3839,14 @@
autoAnimateStyleSheet.type = 'text/css'; autoAnimateStyleSheet.type = 'text/css';
document.head.appendChild( autoAnimateStyleSheet ); document.head.appendChild( autoAnimateStyleSheet );
var animationOptions = getAutoAnimateOptions( toSlide ); let animationOptions = getAutoAnimateOptions( toSlide );
// Set our starting state // Set our starting state
fromSlide.dataset.autoAnimate = 'pending'; fromSlide.dataset.autoAnimate = 'pending';
toSlide.dataset.autoAnimate = 'pending'; toSlide.dataset.autoAnimate = 'pending';
// Inject our auto-animate styles for this transition // Inject our auto-animate styles for this transition
var css = getAutoAnimatableElements( fromSlide, toSlide ).map( function( elements ) { let css = getAutoAnimatableElements( fromSlide, toSlide ).map( function( elements ) {
return getAutoAnimateCSS( elements.from, elements.to, elements.options || {}, animationOptions, autoAnimateCounter++ ); return getAutoAnimateCSS( elements.from, elements.to, elements.options || {}, animationOptions, autoAnimateCounter++ );
} ); } );
@ -3857,7 +3856,7 @@
unmatchedElement.dataset.autoAnimateTarget = 'unmatched'; unmatchedElement.dataset.autoAnimateTarget = 'unmatched';
} ); } );
css.push( '[data-auto-animate="running"] [data-auto-animate-target="unmatched"] { transition: opacity '+ (animationOptions.duration*0.8) +'s ease '+ (animationOptions.duration*0.2) +'s; }' ); css.push( `[data-auto-animate="running"] [data-auto-animate-target="unmatched"] { transition: opacity ${animationOptions.duration*0.8}s ease ${animationOptions.duration*0.2}s; }` );
} }
// Setting the whole chunk of CSS at once is the most // Setting the whole chunk of CSS at once is the most
@ -3866,7 +3865,7 @@
autoAnimateStyleSheet.innerHTML = css.join( '' ); autoAnimateStyleSheet.innerHTML = css.join( '' );
// Start the animation next cycle // Start the animation next cycle
requestAnimationFrame( function() { requestAnimationFrame( () => {
if( autoAnimateStyleSheet ) { if( autoAnimateStyleSheet ) {
// This forces our newly injected styles to be applied in Firefox // This forces our newly injected styles to be applied in Firefox
getComputedStyle( autoAnimateStyleSheet ).fontWeight; getComputedStyle( autoAnimateStyleSheet ).fontWeight;
@ -3887,7 +3886,7 @@
*/ */
function removeEphemeralAutoAnimateAttributes() { function removeEphemeralAutoAnimateAttributes() {
toArray( dom.wrapper.querySelectorAll( '[data-auto-animate-target]' ) ).forEach( function( element ) { toArray( dom.wrapper.querySelectorAll( '[data-auto-animate-target]' ) ).forEach( element => {
delete element.dataset.autoAnimateTarget; delete element.dataset.autoAnimateTarget;
} ); } );
@ -3913,7 +3912,7 @@
// Each element may override any of the auto-animate options // Each element may override any of the auto-animate options
// like transition easing, duration and delay via data-attributes // like transition easing, duration and delay via data-attributes
var options = getAutoAnimateOptions( to, animationOptions ); let options = getAutoAnimateOptions( to, animationOptions );
// If we're using a custom element matcher the element options // If we're using a custom element matcher the element options
// may contain additional transition overrides // may contain additional transition overrides
@ -3921,7 +3920,7 @@
if( typeof elementOptions.duration !== 'undefined' ) options.duration = elementOptions.duration; if( typeof elementOptions.duration !== 'undefined' ) options.duration = elementOptions.duration;
if( typeof elementOptions.easing !== 'undefined' ) options.easing = elementOptions.easing; if( typeof elementOptions.easing !== 'undefined' ) options.easing = elementOptions.easing;
var fromProps = getAutoAnimatableProperties( 'from', from, elementOptions ), let fromProps = getAutoAnimatableProperties( 'from', from, elementOptions ),
toProps = getAutoAnimatableProperties( 'to', to, elementOptions ); toProps = getAutoAnimatableProperties( 'to', to, elementOptions );
// If translation and/or scaling are enabled, css transform // If translation and/or scaling are enabled, css transform
@ -3929,9 +3928,9 @@
// of the 'from' element // of the 'from' element
if( elementOptions.translate !== false || elementOptions.scale !== false ) { if( elementOptions.translate !== false || elementOptions.scale !== false ) {
var presentationScale = Reveal.getScale(); let presentationScale = Reveal.getScale();
var delta = { let delta = {
x: ( fromProps.x - toProps.x ) / presentationScale, x: ( fromProps.x - toProps.x ) / presentationScale,
y: ( fromProps.y - toProps.y ) / presentationScale, y: ( fromProps.y - toProps.y ) / presentationScale,
scaleX: fromProps.width / toProps.width, scaleX: fromProps.width / toProps.width,
@ -3944,13 +3943,13 @@
delta.scaleX = Math.round( delta.scaleX * 1000 ) / 1000; delta.scaleX = Math.round( delta.scaleX * 1000 ) / 1000;
delta.scaleX = Math.round( delta.scaleX * 1000 ) / 1000; delta.scaleX = Math.round( delta.scaleX * 1000 ) / 1000;
var translate = elementOptions.translate !== false && ( delta.x !== 0 || delta.y !== 0 ), let translate = elementOptions.translate !== false && ( delta.x !== 0 || delta.y !== 0 ),
scale = elementOptions.scale !== false && ( delta.scaleX !== 0 || delta.scaleY !== 0 ); scale = elementOptions.scale !== false && ( delta.scaleX !== 0 || delta.scaleY !== 0 );
// No need to transform if nothing's changed // No need to transform if nothing's changed
if( translate || scale ) { if( translate || scale ) {
var transform = []; let transform = [];
if( translate ) transform.push( 'translate('+delta.x+'px, '+delta.y+'px)' ); if( translate ) transform.push( 'translate('+delta.x+'px, '+delta.y+'px)' );
if( scale ) transform.push( 'scale('+delta.scaleX+','+delta.scaleY+')' ); if( scale ) transform.push( 'scale('+delta.scaleX+','+delta.scaleY+')' );
@ -3965,9 +3964,9 @@
} }
// Delete all unchanged 'to' styles // Delete all unchanged 'to' styles
for( var propertyName in toProps.styles ) { for( let propertyName in toProps.styles ) {
var toValue = toProps.styles[propertyName]; const toValue = toProps.styles[propertyName];
var fromValue = fromProps.styles[propertyName]; const fromValue = fromProps.styles[propertyName];
if( toValue === fromValue ) { if( toValue === fromValue ) {
delete toProps.styles[propertyName]; delete toProps.styles[propertyName];
@ -3985,9 +3984,9 @@
} }
} }
var css = ''; let css = '';
var toStyleProperties = Object.keys( toProps.styles ); let toStyleProperties = Object.keys( toProps.styles );
// Only create animate this element IF at least one style // Only create animate this element IF at least one style
// property has changed // property has changed
@ -3997,17 +3996,17 @@
fromProps.styles['transition'] = 'none'; fromProps.styles['transition'] = 'none';
// Animate towards the 'to' state // Animate towards the 'to' state
toProps.styles['transition'] = 'all '+ options.duration +'s '+ options.easing + ' ' + options.delay + 's'; toProps.styles['transition'] = `all ${options.duration}s ${options.easing} ${options.delay}s`;
toProps.styles['transition-property'] = toStyleProperties.join( ', ' ); toProps.styles['transition-property'] = toStyleProperties.join( ', ' );
toProps.styles['will-change'] = toStyleProperties.join( ', ' ); toProps.styles['will-change'] = toStyleProperties.join( ', ' );
// Build up our custom CSS. We need to override inline styles // Build up our custom CSS. We need to override inline styles
// so we need to make our styles vErY IMPORTANT!1!! // so we need to make our styles vErY IMPORTANT!1!!
var fromCSS = Object.keys( fromProps.styles ).map( function( propertyName ) { let fromCSS = Object.keys( fromProps.styles ).map( function( propertyName ) {
return propertyName + ': ' + fromProps.styles[propertyName] + ' !important;'; return propertyName + ': ' + fromProps.styles[propertyName] + ' !important;';
} ).join( '' ); } ).join( '' );
var toCSS = Object.keys( toProps.styles ).map( function( propertyName ) { let toCSS = Object.keys( toProps.styles ).map( function( propertyName ) {
return propertyName + ': ' + toProps.styles[propertyName] + ' !important;'; return propertyName + ': ' + toProps.styles[propertyName] + ' !important;';
} ).join( '' ); } ).join( '' );
@ -4030,17 +4029,17 @@
*/ */
function getAutoAnimateOptions( element, inheritedOptions ) { function getAutoAnimateOptions( element, inheritedOptions ) {
var options = { let options = {
easing: config.autoAnimateEasing, easing: config.autoAnimateEasing,
duration: config.autoAnimateDuration, duration: config.autoAnimateDuration,
delay: 0 delay: 0
}; };
if( inheritedOptions ) options = extend( options, inheritedOptions ); options = {...options, ...inheritedOptions};
// Inherit options from parent elements // Inherit options from parent elements
if( element.closest && element.parentNode ) { if( element.closest && element.parentNode ) {
var autoAnimatedParent = element.parentNode.closest( '[data-auto-animate-target]' ); let autoAnimatedParent = element.parentNode.closest( '[data-auto-animate-target]' );
if( autoAnimatedParent ) { if( autoAnimatedParent ) {
options = getAutoAnimateOptions( autoAnimatedParent, options ); options = getAutoAnimateOptions( autoAnimatedParent, options );
} }
@ -4071,11 +4070,11 @@
*/ */
function getAutoAnimatableProperties( direction, element, elementOptions ) { function getAutoAnimatableProperties( direction, element, elementOptions ) {
var properties = { styles: [] }; let properties = { styles: [] };
// Position and size // Position and size
if( elementOptions.translate !== false || elementOptions.scale !== false ) { if( elementOptions.translate !== false || elementOptions.scale !== false ) {
var bounds; let bounds;
// Custom auto-animate may optionally return a custom tailored // Custom auto-animate may optionally return a custom tailored
// measurement function // measurement function
@ -4092,11 +4091,11 @@
properties.height = bounds.height; properties.height = bounds.height;
} }
var computedStyles = getComputedStyle( element ); const computedStyles = getComputedStyle( element );
// CSS styles // CSS styles
( elementOptions.styles || config.autoAnimateStyles ).forEach( function( style ) { ( elementOptions.styles || config.autoAnimateStyles ).forEach( style => {
var value; let value;
// `style` is either the property name directly, or an object // `style` is either the property name directly, or an object
// definition of a style property // definition of a style property
@ -4134,14 +4133,14 @@
*/ */
function getAutoAnimatableElements( fromSlide, toSlide ) { function getAutoAnimatableElements( fromSlide, toSlide ) {
var matcher = typeof config.autoAnimateMatcher === 'function' ? config.autoAnimateMatcher : getAutoAnimatePairs; let matcher = typeof config.autoAnimateMatcher === 'function' ? config.autoAnimateMatcher : getAutoAnimatePairs;
var pairs = matcher( fromSlide, toSlide ); let pairs = matcher( fromSlide, toSlide );
var reserved = []; let reserved = [];
// Remove duplicate pairs // Remove duplicate pairs
return pairs.filter( function( pair, index ) { return pairs.filter( ( pair, index ) => {
if( reserved.indexOf( pair.to ) === -1 ) { if( reserved.indexOf( pair.to ) === -1 ) {
reserved.push( pair.to ); reserved.push( pair.to );
return true; return true;
@ -4158,33 +4157,33 @@
*/ */
function getAutoAnimatePairs( fromSlide, toSlide ) { function getAutoAnimatePairs( fromSlide, toSlide ) {
var pairs = []; let pairs = [];
var codeNodes = 'pre'; const codeNodes = 'pre';
var textNodes = 'h1, h2, h3, h4, h5, h6, p, li'; const textNodes = 'h1, h2, h3, h4, h5, h6, p, li';
var mediaNodes = 'img, video, iframe'; const mediaNodes = 'img, video, iframe';
// Eplicit matches via data-id // Eplicit matches via data-id
findAutoAnimateMatches( pairs, fromSlide, toSlide, '[data-id]', function( node ) { findAutoAnimateMatches( pairs, fromSlide, toSlide, '[data-id]', node => {
return node.nodeName + ':::' + node.getAttribute( 'data-id' ); return node.nodeName + ':::' + node.getAttribute( 'data-id' );
} ); } );
// Text // Text
findAutoAnimateMatches( pairs, fromSlide, toSlide, textNodes, function( node ) { findAutoAnimateMatches( pairs, fromSlide, toSlide, textNodes, node => {
return node.nodeName + ':::' + node.innerText; return node.nodeName + ':::' + node.innerText;
} ); } );
// Media // Media
findAutoAnimateMatches( pairs, fromSlide, toSlide, mediaNodes, function( node ) { findAutoAnimateMatches( pairs, fromSlide, toSlide, mediaNodes, node => {
return node.nodeName + ':::' + ( node.getAttribute( 'src' ) || node.getAttribute( 'data-src' ) ); return node.nodeName + ':::' + ( node.getAttribute( 'src' ) || node.getAttribute( 'data-src' ) );
} ); } );
// Code // Code
findAutoAnimateMatches( pairs, fromSlide, toSlide, codeNodes, function( node ) { findAutoAnimateMatches( pairs, fromSlide, toSlide, codeNodes, node => {
return node.nodeName + ':::' + node.innerText; return node.nodeName + ':::' + node.innerText;
} ); } );
pairs.forEach( function( pair ) { pairs.forEach( pair => {
// Disable scale transformations on text nodes, we transiition // Disable scale transformations on text nodes, we transiition
// each individual text property instead // each individual text property instead
@ -4199,7 +4198,7 @@
pair.options = { scale: false, styles: [ 'width', 'height' ] }; pair.options = { scale: false, styles: [ 'width', 'height' ] };
// Lines of code // Lines of code
findAutoAnimateMatches( pairs, pair.from, pair.to, '.hljs .hljs-ln-code', function( node ) { findAutoAnimateMatches( pairs, pair.from, pair.to, '.hljs .hljs-ln-code', node => {
return node.textContent; return node.textContent;
}, { }, {
scale: false, scale: false,
@ -4208,7 +4207,7 @@
} ); } );
// Line numbers // Line numbers
findAutoAnimateMatches( pairs, pair.from, pair.to, '.hljs .hljs-ln-line[data-line-number]', function( node ) { findAutoAnimateMatches( pairs, pair.from, pair.to, '.hljs .hljs-ln-line[data-line-number]', node => {
return node.getAttribute( 'data-line-number' ); return node.getAttribute( 'data-line-number' );
}, { }, {
scale: false, scale: false,
@ -4233,7 +4232,7 @@
*/ */
function getLocalBoundingBox( element ) { function getLocalBoundingBox( element ) {
var presentationScale = Reveal.getScale(); const presentationScale = Reveal.getScale();
return { return {
x: Math.round( ( element.offsetLeft * presentationScale ) * 100 ) / 100, x: Math.round( ( element.offsetLeft * presentationScale ) * 100 ) / 100,
@ -4257,28 +4256,28 @@
*/ */
function findAutoAnimateMatches( pairs, fromScope, toScope, selector, serializer, animationOptions ) { function findAutoAnimateMatches( pairs, fromScope, toScope, selector, serializer, animationOptions ) {
var fromMatches = {}; let fromMatches = {};
var toMatches = {}; let toMatches = {};
[].slice.call( fromScope.querySelectorAll( selector ) ).forEach( function( element, i ) { [].slice.call( fromScope.querySelectorAll( selector ) ).forEach( ( element, i ) => {
var key = serializer( element ); const key = serializer( element );
if( typeof key === 'string' && key.length ) { if( typeof key === 'string' && key.length ) {
fromMatches[key] = fromMatches[key] || []; fromMatches[key] = fromMatches[key] || [];
fromMatches[key].push( element ); fromMatches[key].push( element );
} }
} ); } );
[].slice.call( toScope.querySelectorAll( selector ) ).forEach( function( element, i ) { [].slice.call( toScope.querySelectorAll( selector ) ).forEach( ( element, i ) => {
var key = serializer( element ); const key = serializer( element );
toMatches[key] = toMatches[key] || []; toMatches[key] = toMatches[key] || [];
toMatches[key].push( element ); toMatches[key].push( element );
var fromElement; let fromElement;
// Retrieve the 'from' element // Retrieve the 'from' element
if( fromMatches[key] ) { if( fromMatches[key] ) {
var pimaryIndex = toMatches[key].length - 1; const pimaryIndex = toMatches[key].length - 1;
var secondaryIndex = fromMatches[key].length - 1; const secondaryIndex = fromMatches[key].length - 1;
// If there are multiple identical from elements, retrieve // If there are multiple identical from elements, retrieve
// the one at the same index as our to-element. // the one at the same index as our to-element.
@ -4320,9 +4319,9 @@
*/ */
function getUnmatchedAutoAnimateElements( rootElement ) { function getUnmatchedAutoAnimateElements( rootElement ) {
return [].slice.call( rootElement.children ).reduce( function( result, element ) { return [].slice.call( rootElement.children ).reduce( ( result, element ) => {
var containsAnimatedElements = element.querySelector( '[data-auto-animate-target]' ); const containsAnimatedElements = element.querySelector( '[data-auto-animate-target]' );
// The element is unmatched if // The element is unmatched if
// - It is not an auto-animate target // - It is not an auto-animate target