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why-cant-we-deploy-today
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group feature detection results in 'features' object, test for canvas and requestAnimationFrame

This commit is contained in:
Hakim El Hattab 2013-10-13 13:08:50 -04:00
parent 9fa1382508
commit 356a1cf3b7
2 changed files with 14 additions and 13 deletions
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23
js/reveal.js
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@ -136,11 +136,8 @@ var Reveal = (function(){
// Cached references to DOM elements // Cached references to DOM elements
dom = {}, dom = {},
// Client support for CSS 3D transforms, see #checkCapabilities() // Features supported by the browser, see #checkCapabilities()
supports3DTransforms, features = {},
// Client support for CSS 2D transforms, see #checkCapabilities()
supports2DTransforms,
// Client is a mobile device, see #checkCapabilities() // Client is a mobile device, see #checkCapabilities()
isMobileDevice, isMobileDevice,
@ -183,7 +180,7 @@ var Reveal = (function(){
checkCapabilities(); checkCapabilities();
if( !supports2DTransforms && !supports3DTransforms ) { if( !features.transforms2d && !features.transforms3d ) {
document.body.setAttribute( 'class', 'no-transforms' ); document.body.setAttribute( 'class', 'no-transforms' );
// If the browser doesn't support core features we won't be // If the browser doesn't support core features we won't be
@ -212,18 +209,22 @@ var Reveal = (function(){
*/ */
function checkCapabilities() { function checkCapabilities() {
supports3DTransforms = 'WebkitPerspective' in document.body.style || features.transforms3d = 'WebkitPerspective' in document.body.style ||
'MozPerspective' in document.body.style || 'MozPerspective' in document.body.style ||
'msPerspective' in document.body.style || 'msPerspective' in document.body.style ||
'OPerspective' in document.body.style || 'OPerspective' in document.body.style ||
'perspective' in document.body.style; 'perspective' in document.body.style;
supports2DTransforms = 'WebkitTransform' in document.body.style || features.transforms2d = 'WebkitTransform' in document.body.style ||
'MozTransform' in document.body.style || 'MozTransform' in document.body.style ||
'msTransform' in document.body.style || 'msTransform' in document.body.style ||
'OTransform' in document.body.style || 'OTransform' in document.body.style ||
'transform' in document.body.style; 'transform' in document.body.style;
features.requestAnimationFrame = typeof window.requestAnimationFrame === 'function';
features.canvas = !!document.createElement( 'canvas' ).getContext;
isMobileDevice = navigator.userAgent.match( /(iphone|ipod|android)/gi ); isMobileDevice = navigator.userAgent.match( /(iphone|ipod|android)/gi );
} }
@ -523,7 +524,7 @@ var Reveal = (function(){
if( typeof options === 'object' ) extend( config, options ); if( typeof options === 'object' ) extend( config, options );
// Force linear transition based on browser capabilities // Force linear transition based on browser capabilities
if( supports3DTransforms === false ) config.transition = 'linear'; if( features.transforms3d === false ) config.transition = 'linear';
dom.wrapper.classList.add( config.transition ); dom.wrapper.classList.add( config.transition );
@ -886,7 +887,7 @@ var Reveal = (function(){
*/ */
function enableRollingLinks() { function enableRollingLinks() {
if( supports3DTransforms && !( 'msPerspective' in document.body.style ) ) { if( features.transforms3d && !( 'msPerspective' in document.body.style ) ) {
var anchors = document.querySelectorAll( SLIDES_SELECTOR + ' a:not(.image)' ); var anchors = document.querySelectorAll( SLIDES_SELECTOR + ' a:not(.image)' );
for( var i = 0, len = anchors.length; i < len; i++ ) { for( var i = 0, len = anchors.length; i < len; i++ ) {
@ -2472,7 +2473,7 @@ var Reveal = (function(){
event.preventDefault(); event.preventDefault();
} }
// ESC or O key // ESC or O key
else if ( ( event.keyCode === 27 || event.keyCode === 79 ) && supports3DTransforms ) { else if ( ( event.keyCode === 27 || event.keyCode === 79 ) && features.transforms3d ) {
if( dom.preview ) { if( dom.preview ) {
closePreview(); closePreview();
} }

4
js/reveal.min.js vendored
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