Im从这里使用"变形按钮概念"http://tympanus.net/codrops/2014/05/12/morphing-buttons-concept/
问题是它在IE9中不起作用。错误显示：if（ev.target！==this）｛异常｝未定义或为空
我在stackoverflow上发现的https://stackoverflow.com/a/1143236/3310123
但我似乎无法将其实现到带有"变形按钮"的uiMorphingButton_fixed.js
有人知道要改变什么才能在IE 9中工作吗（它在10和11中工作）？
if（ev.target！==this）可以在uiMorphingButton_fixed.js的第90行找到：var self＝this，onEndTransitionFn=函数（ev）{if（ev.target！==this）返回false；
if( support.transitions ) {
// open: first opacity then width/height/left/top
// close: first width/height/left/top then opacity
if( self.expanded && ev.propertyName !== 'opacity' || !self.expanded && ev.propertyName !== 'width' && ev.propertyName !== 'height' && ev.propertyName !== 'left' && ev.propertyName !== 'top' ) {
return false;
}
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.contentEl.addEventListener( transEndEventName, onEndTransitionFn );
}
else {
onEndTransitionFn();
}
问题似乎就在这里：
support.transitions返回false，因此onEndTransitionFn()运行（在末尾的else中）。
它不向onEndTransitionFn函数发送任何参数。
但该函数需要一个参数，并希望该参数具有target属性。因此，在没有参数的情况下调用它会产生您所看到的错误。
也许删除最后一个if语句之后的else。但无法绕过support.translations仍然是假的这一事实，因此变形可能仍然不起作用。
我更新了.js，所以它现在也可以在IE9上运行。将整个uiMorphingButton_fixed.js替换为：
希望这能帮助到某人：）
/***ui变形按钮固定.js v1.0.0*http://www.codrops.com*获得麻省理工学院许可。*http://www.opensource.org/licenses/mit-license.php*版权所有2014，Codrops*/
;( 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() {
// 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() {
if(support.transitions) {
self.toggle();
} else {
classie.addClass( self.el, 'active open' );
}
} );
// close
if( this.options.closeEl !== '' ) {
var closeEl = this.el.querySelector( this.options.closeEl );
if( closeEl ) {
closeEl.addEventListener( 'click', function() {
if(support.transitions) {
self.toggle();
} else {
classie.removeClass( self.el, 'active open' );
}
} );
}
}
}
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 ) {
// open: first opacity then width/height/left/top
// close: first width/height/left/top then opacity
if( self.expanded && ev.propertyName !== 'opacity' || !self.expanded && ev.propertyName !== 'width' && ev.propertyName !== 'height' && ev.propertyName !== 'left' && ev.propertyName !== 'top' ) {
return false;
}
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.contentEl.addEventListener( transEndEventName, onEndTransitionFn );
}
else {
onEndTransitionFn();
}
// set the left and top values of the contentEl (same like the button)
var buttonPos = this.button.getBoundingClientRect();
// need to reset
classie.addClass( this.contentEl, 'no-transition' );
this.contentEl.style.left = 'auto';
this.contentEl.style.top = 'auto';
// add/remove class "open" to the button wraper
setTimeout( function() {
self.contentEl.style.left = buttonPos.left + 'px';
self.contentEl.style.top = buttonPos.top + 'px';
if( self.expanded ) {
classie.removeClass( self.contentEl, 'no-transition' );
classie.removeClass( self.el, 'open' );
}
else {
setTimeout( function() {
classie.removeClass( self.contentEl, 'no-transition' );
classie.addClass( self.el, 'open' );
}, 25 );
}
}, 25 );
}
// add to global namespace
window.UIMorphingButton = UIMorphingButton;
})( window );