diff options
Diffstat (limited to 'node_modules/react-dom/lib/getVendorPrefixedEventName.js')
-rw-r--r-- | node_modules/react-dom/lib/getVendorPrefixedEventName.js | 100 |
1 files changed, 100 insertions, 0 deletions
diff --git a/node_modules/react-dom/lib/getVendorPrefixedEventName.js b/node_modules/react-dom/lib/getVendorPrefixedEventName.js new file mode 100644 index 000000000..4b051442d --- /dev/null +++ b/node_modules/react-dom/lib/getVendorPrefixedEventName.js @@ -0,0 +1,100 @@ +/** + * Copyright 2013-present, Facebook, Inc. + * All rights reserved. + * + * This source code is licensed under the BSD-style license found in the + * LICENSE file in the root directory of this source tree. An additional grant + * of patent rights can be found in the PATENTS file in the same directory. + * + */ + +'use strict'; + +var ExecutionEnvironment = require('fbjs/lib/ExecutionEnvironment'); + +/** + * Generate a mapping of standard vendor prefixes using the defined style property and event name. + * + * @param {string} styleProp + * @param {string} eventName + * @returns {object} + */ +function makePrefixMap(styleProp, eventName) { + var prefixes = {}; + + prefixes[styleProp.toLowerCase()] = eventName.toLowerCase(); + prefixes['Webkit' + styleProp] = 'webkit' + eventName; + prefixes['Moz' + styleProp] = 'moz' + eventName; + prefixes['ms' + styleProp] = 'MS' + eventName; + prefixes['O' + styleProp] = 'o' + eventName.toLowerCase(); + + return prefixes; +} + +/** + * A list of event names to a configurable list of vendor prefixes. + */ +var vendorPrefixes = { + animationend: makePrefixMap('Animation', 'AnimationEnd'), + animationiteration: makePrefixMap('Animation', 'AnimationIteration'), + animationstart: makePrefixMap('Animation', 'AnimationStart'), + transitionend: makePrefixMap('Transition', 'TransitionEnd') +}; + +/** + * Event names that have already been detected and prefixed (if applicable). + */ +var prefixedEventNames = {}; + +/** + * Element to check for prefixes on. + */ +var style = {}; + +/** + * Bootstrap if a DOM exists. + */ +if (ExecutionEnvironment.canUseDOM) { + style = document.createElement('div').style; + + // On some platforms, in particular some releases of Android 4.x, + // the un-prefixed "animation" and "transition" properties are defined on the + // style object but the events that fire will still be prefixed, so we need + // to check if the un-prefixed events are usable, and if not remove them from the map. + if (!('AnimationEvent' in window)) { + delete vendorPrefixes.animationend.animation; + delete vendorPrefixes.animationiteration.animation; + delete vendorPrefixes.animationstart.animation; + } + + // Same as above + if (!('TransitionEvent' in window)) { + delete vendorPrefixes.transitionend.transition; + } +} + +/** + * Attempts to determine the correct vendor prefixed event name. + * + * @param {string} eventName + * @returns {string} + */ +function getVendorPrefixedEventName(eventName) { + if (prefixedEventNames[eventName]) { + return prefixedEventNames[eventName]; + } else if (!vendorPrefixes[eventName]) { + return eventName; + } + + var prefixMap = vendorPrefixes[eventName]; + + for (var styleProp in prefixMap) { + if (prefixMap.hasOwnProperty(styleProp) && styleProp in style) { + return prefixedEventNames[eventName] = prefixMap[styleProp]; + } + } + + return ''; +} + +module.exports = getVendorPrefixedEventName;
\ No newline at end of file |