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/**
* 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');
var getVendorPrefixedEventName = require('react-dom/lib/getVendorPrefixedEventName');
var endEvents = [];
function detectEvents() {
var animEnd = getVendorPrefixedEventName('animationend');
var transEnd = getVendorPrefixedEventName('transitionend');
if (animEnd) {
endEvents.push(animEnd);
}
if (transEnd) {
endEvents.push(transEnd);
}
}
if (ExecutionEnvironment.canUseDOM) {
detectEvents();
}
// We use the raw {add|remove}EventListener() call because EventListener
// does not know how to remove event listeners and we really should
// clean up. Also, these events are not triggered in older browsers
// so we should be A-OK here.
function addEventListener(node, eventName, eventListener) {
node.addEventListener(eventName, eventListener, false);
}
function removeEventListener(node, eventName, eventListener) {
node.removeEventListener(eventName, eventListener, false);
}
var ReactTransitionEvents = {
addEndEventListener: function (node, eventListener) {
if (endEvents.length === 0) {
// If CSS transitions are not supported, trigger an "end animation"
// event immediately.
window.setTimeout(eventListener, 0);
return;
}
endEvents.forEach(function (endEvent) {
addEventListener(node, endEvent, eventListener);
});
},
removeEndEventListener: function (node, eventListener) {
if (endEvents.length === 0) {
return;
}
endEvents.forEach(function (endEvent) {
removeEventListener(node, endEvent, eventListener);
});
}
};
module.exports = ReactTransitionEvents;
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