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uiMorphingButton_inflow.js
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uiMorphingButton_inflow.js
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/**
* uiMorphingButton_inflow.js v1.0.0
* http://www.codrops.com
*
* Licensed under the MIT license.
* http://www.opensource.org/licenses/mit-license.php
*
* Copyright 2014, Codrops
* http://www.codrops.com
*/
;( function( window ) {
'use strict';
var transEndEventNames = {
'WebkitTransition': 'webkitTransitionEnd',
'MozTransition': 'transitionend',
'OTransition': 'oTransitionEnd',
'msTransition': 'MSTransitionEnd',
'transition': 'transitionend'
},
transEndEventName = transEndEventNames[ Modernizr.prefixed( 'transition' ) ],
support = { transitions : Modernizr.csstransitions };
function extend( a, b ) {
for( var key in b ) {
if( b.hasOwnProperty( key ) ) {
a[key] = b[key];
}
}
return a;
}
function UIMorphingButton( el, options ) {
this.el = el;
this.options = extend( {}, this.options );
extend( this.options, options );
this._init();
}
UIMorphingButton.prototype.options = {
closeEl : '',
onBeforeOpen : function() { return false; },
onAfterOpen : function() { return false; },
onBeforeClose : function() { return false; },
onAfterClose : function() { return false; }
}
UIMorphingButton.prototype._init = function() {
// save element height
this.elH = this.el.offsetHeight;
// the button
this.button = this.el.querySelector( 'button' );
// state
this.expanded = false;
// content el
this.contentEl = this.el.querySelector( '.morph-content' );
// init events
this._initEvents();
}
UIMorphingButton.prototype._initEvents = function() {
var self = this;
// open
this.button.addEventListener( 'click', function() { self.toggle(); } );
// close
if( this.options.closeEl !== '' ) {
var closeEl = this.el.querySelector( this.options.closeEl );
if( closeEl ) {
closeEl.addEventListener( 'click', function() { self.toggle(); } );
}
}
}
UIMorphingButton.prototype.toggle = function() {
if( this.isAnimating ) return false;
// callback
if( this.expanded ) {
this.options.onBeforeClose();
}
else {
// add class active (solves z-index problem when more than one button is in the page)
classie.addClass( this.el, 'active' );
this.options.onBeforeOpen();
}
this.isAnimating = true;
var self = this,
onEndTransitionFn = function( ev ) {
if( ev.target !== this ) return false;
if( support.transitions ) {
this.removeEventListener( transEndEventName, onEndTransitionFn );
}
self.isAnimating = false;
// callback
if( self.expanded ) {
// remove class active (after closing)
classie.removeClass( self.el, 'active' );
self.options.onAfterClose();
}
else {
self.options.onAfterOpen();
}
self.expanded = !self.expanded;
};
if( support.transitions ) {
this.el.addEventListener( transEndEventName, onEndTransitionFn );
}
else {
onEndTransitionFn();
}
// add/remove class "open" to the button wraper
this.el.style.height = this.expanded ? this.elH + 'px' : this.contentEl.offsetHeight + 'px';
if( this.expanded ) {
classie.removeClass( this.el, 'open' );
}
else {
classie.addClass( this.el, 'open' );
}
}
// add to global namespace
window.UIMorphingButton = UIMorphingButton;
})( window );