text: 
  
    // Copyright 2014 Google Inc. All rights reserved.
  //
  // Licensed under the Apache License, Version 2.0 (the "License");
  // you may not use this file except in compliance with the License.
  //     You may obtain a copy of the License at
  //
  // http://www.apache.org/licenses/LICENSE-2.0
  //
  // Unless required by applicable law or agreed to in writing, software
  // distributed under the License is distributed on an "AS IS" BASIS,
  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  //     See the License for the specific language governing permissions and
  // limitations under the License.
  
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instead."),this._normalizedKeyframes=d):this._normalizedKeyframes=new c(d),this._keyframes=d,this.activeDuration=a.calculateActiveDuration(this._timing),this},b.KeyframeEffect.prototype={getFrames:function(){return"function"==typeof this._normalizedKeyframes?this._normalizedKeyframes:this._normalizedKeyframes._frames},set onsample(a){if("function"==typeof this.getFrames())throw new Error("Setting onsample on custom effect KeyframeEffect is not supported.");this._onsample=a,this._animation&&this._animation._rebuildUnderlyingAnimation()},get parent(){return this._parent},clone:function(){if("function"==typeof this.getFrames())throw new Error("Cloning custom effects is not supported.");var b=new KeyframeEffect(this.target,[],a.cloneTimingInput(this._timingInput));return b._normalizedKeyframes=this._normalizedKeyframes,b._keyframes=this._keyframes,b},remove:function(){b.removeMulti([this])}};var f=Element.prototype.animate;Element.prototype.animate=function(a,c){return b.timeline._play(new b.KeyframeEffect(this,a,c))};var g=document.createElementNS("http://www.w3.org/1999/xhtml","div");b.newUnderlyingAnimationForKeyframeEffect=function(a){if(a){var b=a.target||g,c=a._keyframes;"function"==typeof c&&(c=[]);var d=a._timingInput}else var b=g,c=[],d=0;return f.apply(b,[c,d])},b.bindAnimationForKeyframeEffect=function(a){a.effect&&"function"==typeof a.effect._normalizedKeyframes&&b.bindAnimationForCustomEffect(a)};var h=[];b.awaitStartTime=function(a){null===a.startTime&&a._isGroup&&(0==h.length&&requestAnimationFrame(d),h.push(a))};var i=window.getComputedStyle;Object.defineProperty(window,"getComputedStyle",{configurable:!0,enumerable:!0,value:function(){window.document.timeline._updateAnimationsPromises();var a=i.apply(this,arguments);return d()&&(a=i.apply(this,arguments)),window.document.timeline._updateAnimationsPromises(),a}}),window.KeyframeEffect=b.KeyframeEffect,window.Element.prototype.getAnimations=function(){return document.timeline.getAnimations().filter(function(a){return null!==a.effect&&a.effect.target==this}.bind(this))}}(c,e,f),function(a,b){function c(a){a._registered||(a._registered=!0,f.push(a),g||(g=!0,requestAnimationFrame(d)))}function d(){var a=f;f=[],a.sort(function(a,b){return a._sequenceNumber-b._sequenceNumber}),a=a.filter(function(a){a();var b=a._animation?a._animation.playState:"idle";return"running"!=b&&"pending"!=b&&(a._registered=!1),a._registered}),f.push.apply(f,a),f.length?(g=!0,requestAnimationFrame(d)):g=!1}var e=(document.createElementNS("http://www.w3.org/1999/xhtml","div"),0);b.bindAnimationForCustomEffect=function(b){var d,f=b.effect.target,g="function"==typeof b.effect.getFrames();d=g?b.effect.getFrames():b.effect._onsample;var h=b.effect.timing,i=null;h=a.normalizeTimingInput(h);var j=function(){var c=j._animation?j._animation.currentTime:null;null!==c&&(c=a.calculateTimeFraction(a.calculateActiveDuration(h),c,h),isNaN(c)&&(c=null)),c!==i&&(g?d(c,f,b.effect):d(c,b.effect,b.effect._animation)),i=c};j._animation=b,j._registered=!1,j._sequenceNumber=e++,b._callback=j,c(j)};var f=[],g=!1;b.Animation.prototype._register=function(){this._callback&&c(this._callback)}}(c,e,f),function(a,b){function c(a){return a._timing.delay+a.activeDuration+a._timing.endDelay}function d(b,c){this._parent=null,this.children=b||[],this._reparent(this.children),c=a.numericTimingToObject(c),this._timingInput=a.cloneTimingInput(c),this._timing=a.normalizeTimingInput(c,!0),this.timing=a.makeTiming(c,!0,this),this.timing._effect=this,"auto"===this._timing.duration&&(this._timing.duration=this.activeDuration)}window.SequenceEffect=function(){d.apply(this,arguments)},window.GroupEffect=function(){d.apply(this,arguments)},d.prototype={_isAncestor:function(a){for(var b=this;null!==b;){if(b==a)return!0;b=b._parent}return!1},_rebuild:function(){for(var a=this;a;)"auto"===a.timing.duration&&(a._timing.duration=a.activeDuration),a=a._parent;this._animation&&this._animation._rebuildUnderlyingAnimation()},_reparent:function(a){b.removeMulti(a);for(var c=0;c<a.length;c++)a[c]._parent=this},_putChild:function(a,b){for(var c=b?"Cannot append an ancestor or self":"Cannot prepend an ancestor or self",d=0;d<a.length;d++)if(this._isAncestor(a[d]))throw{type:DOMException.HIERARCHY_REQUEST_ERR,name:"HierarchyRequestError",message:c};for(var d=0;d<a.length;d++)b?this.children.push(a[d]):this.children.unshift(a[d]);this._reparent(a),this._rebuild()},append:function(){this._putChild(arguments,!0)},prepend:function(){this._putChild(arguments,!1)},get parent(){return this._parent},get firstChild(){return this.children.length?this.children[0]:null},get lastChild(){return this.children.length?this.children[this.children.length-1]:null},clone:function(){for(var b=a.cloneTimingInput(this._timingInput),c=[],d=0;d<this.children.length;d++)c.push(this.children[d].clone());return this instanceof GroupEffect?new GroupEffect(c,b):new SequenceEffect(c,b)},remove:function(){b.removeMulti([this])}},window.SequenceEffect.prototype=Object.create(d.prototype),Object.defineProperty(window.SequenceEffect.prototype,"activeDuration",{get:function(){var a=0;return this.children.forEach(function(b){a+=c(b)}),Math.max(a,0)}}),window.GroupEffect.prototype=Object.create(d.prototype),Object.defineProperty(window.GroupEffect.prototype,"activeDuration",{get:function(){var a=0;return this.children.forEach(function(b){a=Math.max(a,c(b))}),a}}),b.newUnderlyingAnimationForGroup=function(c){var d,e=null,f=function(b){var c=d._wrapper;return c&&"pending"!=c.playState&&c.effect?null==b?void c._removeChildAnimations():0==b&&c.playbackRate<0&&(e||(e=a.normalizeTimingInput(c.effect.timing)),b=a.calculateTimeFraction(a.calculateActiveDuration(e),-1,e),isNaN(b)||null==b)?(c._forEachChild(function(a){a.currentTime=-1}),void c._removeChildAnimations()):void 0:void 0},g=new KeyframeEffect(null,[],c._timing);return g.onsample=f,d=b.timeline._play(g)},b.bindAnimationForGroup=function(a){a._animation._wrapper=a,a._isGroup=!0,b.awaitStartTime(a),a._constructChildAnimations(),a._setExternalAnimation(a)},b.groupChildDuration=c}(c,e,f)}({},function(){return this}());
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