@webcomponents/shadydom - npm Package Compare versions

Comparing version 1.4.1 to 1.4.2

externs/shadydom.js

@@ -13,9 +13,2 @@ /**
 /**
- * Block renaming of properties added to Window to
- * prevent conflicts with other closure-compiler code.
- * @type {Object}
- */
-Window.prototype.__handlers;
-
-/**
  * Block renaming of properties added to Node to
@@ -25,3 +18,3 @@ * prevent conflicts with other closure-compiler code.
  */
-Node.prototype.__handlers;
+EventTarget.prototype.__handlers;
 
@@ -35,2 +28,27 @@ /** @type {Object} */
 /** @type {Object} */
-IWrapper.prototype._activeElement;
+IWrapper.prototype._activeElement;
+
+// NOTE: For some reason, Closure likes to remove focus() from the IWrapper
+// class. Not yet clear why focus() is affected and not any other methods (e.g.
+// blur).
+IWrapper.prototype.focus = function() {};
+
+/** @type {!boolean|undefined} */
+Event.prototype.__composed;
+
+/** @type {!boolean|undefined} */
+Event.prototype.__immediatePropagationStopped;
+
+/** @type {!Node|undefined} */
+Event.prototype.__relatedTarget;
+
+/** @type {!Array<!EventTarget>|undefined} */
+Event.prototype.__composedPath;
+
+/** @type {!Array<!EventTarget>|undefined} */
+Event.prototype.__relatedTargetComposedPath;
+
+/**
+ * Prevent renaming of this method on ShadyRoot for testing and debugging.
+ */
+ShadowRoot.prototype._renderRoot = function(){};

package.json

 {
   "name": "@webcomponents/shadydom",
-  "version": "1.4.1",
+  "version": "1.4.2",
   "description": "Shadow DOM polyfill",
@@ -5,0 +5,0 @@ "main": "shadydom.min.js",

shadydom.min.js

@@ -12,59 +12,60 @@ (function(){/*
 function da(){ba();var a=p.Symbol.iterator;a||(a=p.Symbol.iterator=p.Symbol("iterator"));"function"!=typeof Array.prototype[a]&&aa(Array.prototype,a,{configurable:!0,writable:!0,value:function(){return ea(this)}});da=function(){}}function ea(a){var b=0;return fa(function(){return b<a.length?{done:!1,value:a[b++]}:{done:!0}})}function fa(a){da();a={next:a};a[p.Symbol.iterator]=function(){return this};return a}function ha(a){da();var b=a[Symbol.iterator];return b?b.call(a):ea(a)}
-function ia(a){for(var b,c=[];!(b=a.next()).done;)c.push(b.value);return c}function r(a,b){return{index:a,s:[],A:b}}
-function ja(a,b,c,d){var e=0,f=0,h=0,g=0,k=Math.min(b-e,d-f);if(0==e&&0==f)a:{for(h=0;h<k;h++)if(a[h]!==c[h])break a;h=k}if(b==a.length&&d==c.length){g=a.length;for(var l=c.length,n=0;n<k-h&&ka(a[--g],c[--l]);)n++;g=n}e+=h;f+=h;b-=g;d-=g;if(0==b-e&&0==d-f)return[];if(e==b){for(b=r(e,0);f<d;)b.s.push(c[f++]);return[b]}if(f==d)return[r(e,b-e)];k=e;h=f;d=d-h+1;g=b-k+1;b=Array(d);for(l=0;l<d;l++)b[l]=Array(g),b[l][0]=l;for(l=0;l<g;l++)b[0][l]=l;for(l=1;l<d;l++)for(n=1;n<g;n++)if(a[k+n-1]===c[h+l-1])b[l][n]=
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-b.A++;e++;break;case 3:b||(b=r(e,0)),b.s.push(c[f]),f++}b&&k.push(b);return k}function ka(a,b){return a===b};function la(){this.O=this.root=null;this.C=!1;this.h=this.w=this.I=this.assignedSlot=this.assignedNodes=this.j=null;this.childNodes=this.nextSibling=this.previousSibling=this.lastChild=this.firstChild=this.parentNode=this.o=void 0;this.K=this.L=!1;this.v={}}la.prototype.toJSON=function(){return{}};function t(a){a.__shady||(a.__shady=new la);return a.__shady}function u(a){return a&&a.__shady};var v=window.ShadyDOM||{};v.Y=!(!Element.prototype.attachShadow||!Node.prototype.getRootNode);var ma=Object.getOwnPropertyDescriptor(Node.prototype,"firstChild");v.c=!!(ma&&ma.configurable&&ma.get);v.J=v.force||!v.Y;v.m=v.noPatch||!1;v.N=v.preferPerformance;function w(a){return(a=u(a))&&void 0!==a.firstChild}function x(a){return"ShadyRoot"===a.V}function y(a){a=a.__shady_getRootNode();if(x(a))return a}function na(a){return(a=(a=u(a))&&a.root)&&oa(a)}
-var z=Element.prototype,pa=z.matches||z.matchesSelector||z.mozMatchesSelector||z.msMatchesSelector||z.oMatchesSelector||z.webkitMatchesSelector,qa=document.createTextNode(""),ra=0,sa=[];(new MutationObserver(function(){for(;sa.length;)try{sa.shift()()}catch(a){throw qa.textContent=ra++,a;}})).observe(qa,{characterData:!0});function ta(a){sa.push(a);qa.textContent=ra++}var ua=!!document.contains;function va(a,b){for(;b;){if(b==a)return!0;b=b.__shady_parentNode}return!1}
+function ia(a){for(var b,c=[];!(b=a.next()).done;)c.push(b.value);return c}function r(a,b){return{index:a,m:[],u:b}}
+function ja(a,b,c,d){var e=0,f=0,h=0,g=0,k=Math.min(b-e,d-f);if(0==e&&0==f)a:{for(h=0;h<k;h++)if(a[h]!==c[h])break a;h=k}if(b==a.length&&d==c.length){g=a.length;for(var l=c.length,n=0;n<k-h&&ka(a[--g],c[--l]);)n++;g=n}e+=h;f+=h;b-=g;d-=g;if(0==b-e&&0==d-f)return[];if(e==b){for(b=r(e,0);f<d;)b.m.push(c[f++]);return[b]}if(f==d)return[r(e,b-e)];k=e;h=f;d=d-h+1;g=b-k+1;b=Array(d);for(l=0;l<d;l++)b[l]=Array(g),b[l][0]=l;for(l=0;l<g;l++)b[0][l]=l;for(l=1;l<d;l++)for(n=1;n<g;n++)if(a[k+n-1]===c[h+l-1])b[l][n]=
+b[l-1][n-1];else{var q=b[l-1][n]+1,P=b[l][n-1]+1;b[l][n]=q<P?q:P}k=b.length-1;h=b[0].length-1;d=b[k][h];for(a=[];0<k||0<h;)0==k?(a.push(2),h--):0==h?(a.push(3),k--):(g=b[k-1][h-1],l=b[k-1][h],n=b[k][h-1],q=l<n?l<g?l:g:n<g?n:g,q==g?(g==d?a.push(0):(a.push(1),d=g),k--,h--):q==l?(a.push(3),k--,d=l):(a.push(2),h--,d=n));a.reverse();b=void 0;k=[];for(h=0;h<a.length;h++)switch(a[h]){case 0:b&&(k.push(b),b=void 0);e++;f++;break;case 1:b||(b=r(e,0));b.u++;e++;b.m.push(c[f]);f++;break;case 2:b||(b=r(e,0));
+b.u++;e++;break;case 3:b||(b=r(e,0)),b.m.push(c[f]),f++}b&&k.push(b);return k}function ka(a,b){return a===b};function la(){this.K=this.root=null;this.w=!1;this.g=this.s=this.D=this.assignedSlot=this.assignedNodes=this.i=null;this.childNodes=this.nextSibling=this.previousSibling=this.lastChild=this.firstChild=this.parentNode=this.l=void 0;this.G=this.H=!1;this.o={}}la.prototype.toJSON=function(){return{}};function t(a){a.__shady||(a.__shady=new la);return a.__shady}function u(a){return a&&a.__shady};var v=window.ShadyDOM||{};v.T=!(!Element.prototype.attachShadow||!Node.prototype.getRootNode);var ma=Object.getOwnPropertyDescriptor(Node.prototype,"firstChild");v.c=!!(ma&&ma.configurable&&ma.get);v.F=v.force||!v.T;v.j=v.noPatch||!1;v.J=v.preferPerformance;function w(a){return(a=u(a))&&void 0!==a.firstChild}function x(a){return"ShadyRoot"===a.P}function na(a){return(a=(a=u(a))&&a.root)&&oa(a)}
+var y=Element.prototype,pa=y.matches||y.matchesSelector||y.mozMatchesSelector||y.msMatchesSelector||y.oMatchesSelector||y.webkitMatchesSelector,qa=document.createTextNode(""),ra=0,sa=[];(new MutationObserver(function(){for(;sa.length;)try{sa.shift()()}catch(a){throw qa.textContent=ra++,a;}})).observe(qa,{characterData:!0});function ta(a){sa.push(a);qa.textContent=ra++}var ua=!!document.contains;function va(a,b){for(;b;){if(b==a)return!0;b=b.__shady_parentNode}return!1}
 function wa(a){for(var b=a.length-1;0<=b;b--){var c=a[b],d=c.getAttribute("id")||c.getAttribute("name");d&&"length"!==d&&isNaN(d)&&(a[d]=c)}a.item=function(b){return a[b]};a.namedItem=function(b){if("length"!==b&&isNaN(b)&&a[b])return a[b];for(var c=ha(a),d=c.next();!d.done;d=c.next())if(d=d.value,(d.getAttribute("id")||d.getAttribute("name"))==b)return d;return null};return a}
-function A(a,b,c,d){c=void 0===c?"":c;for(var e in b){var f=b[e];if(!(d&&0<=d.indexOf(e))){f.configurable=!0;var h=c+e;if(f.value)a[h]=f.value;else try{Object.defineProperty(a,h,f)}catch(g){}}}}function B(a){var b={};Object.getOwnPropertyNames(a).forEach(function(c){b[c]=Object.getOwnPropertyDescriptor(a,c)});return b};var C=[],xa;function ya(a){xa||(xa=!0,ta(D));C.push(a)}function D(){xa=!1;for(var a=!!C.length;C.length;)C.shift()();return a}D.list=C;var E=B({get childNodes(){return this.__shady_childNodes},get firstChild(){return this.__shady_firstChild},get lastChild(){return this.__shady_lastChild},get textContent(){return this.__shady_textContent},set textContent(a){this.__shady_textContent=a},get childElementCount(){return this.__shady_childElementCount},get children(){return this.__shady_children},get firstElementChild(){return this.__shady_firstElementChild},get lastElementChild(){return this.__shady_lastElementChild},get innerHTML(){return this.__shady_innerHTML},
-set innerHTML(a){return this.__shady_innerHTML=a},get shadowRoot(){return this.__shady_shadowRoot}}),F=B({get parentElement(){return this.__shady_parentElement},get parentNode(){return this.__shady_parentNode},get nextSibling(){return this.__shady_nextSibling},get previousSibling(){return this.__shady_previousSibling},get nextElementSibling(){return this.__shady_nextElementSibling},get previousElementSibling(){return this.__shady_previousElementSibling},get className(){return this.__shady_className},
-set className(a){return this.__shady_className=a}}),za;for(za in E)E[za].enumerable=!1;for(var Aa in F)F[Aa].enumerable=!1;var Ba=v.c||v.m,Ca=Ba?function(){}:function(a){var b=t(a);b.L||(b.L=!0,A(a,F))},Da=Ba?function(){}:function(a){var b=t(a);b.K||(b.K=!0,A(a,E))};function Ea(a,b,c){Ca(a);c=c||null;var d=t(a),e=t(b),f=c?t(c):null;d.previousSibling=c?f.previousSibling:b.__shady_lastChild;if(f=u(d.previousSibling))f.nextSibling=a;if(f=u(d.nextSibling=c))f.previousSibling=a;d.parentNode=b;c?c===e.firstChild&&(e.firstChild=a):(e.lastChild=a,e.firstChild||(e.firstChild=a));e.childNodes=null}
+function z(a,b,c,d){c=void 0===c?"":c;for(var e in b){var f=b[e];if(!(d&&0<=d.indexOf(e))){f.configurable=!0;var h=c+e;if(f.value)a[h]=f.value;else try{Object.defineProperty(a,h,f)}catch(g){}}}}function A(a){var b={};Object.getOwnPropertyNames(a).forEach(function(c){b[c]=Object.getOwnPropertyDescriptor(a,c)});return b};var B=[],xa;function ya(a){xa||(xa=!0,ta(C));B.push(a)}function C(){xa=!1;for(var a=!!B.length;B.length;)B.shift()();return a}C.list=B;var D=A({get childNodes(){return this.__shady_childNodes},get firstChild(){return this.__shady_firstChild},get lastChild(){return this.__shady_lastChild},get textContent(){return this.__shady_textContent},set textContent(a){this.__shady_textContent=a},get childElementCount(){return this.__shady_childElementCount},get children(){return this.__shady_children},get firstElementChild(){return this.__shady_firstElementChild},get lastElementChild(){return this.__shady_lastElementChild},get innerHTML(){return this.__shady_innerHTML},
+set innerHTML(a){return this.__shady_innerHTML=a},get shadowRoot(){return this.__shady_shadowRoot}}),E=A({get parentElement(){return this.__shady_parentElement},get parentNode(){return this.__shady_parentNode},get nextSibling(){return this.__shady_nextSibling},get previousSibling(){return this.__shady_previousSibling},get nextElementSibling(){return this.__shady_nextElementSibling},get previousElementSibling(){return this.__shady_previousElementSibling},get className(){return this.__shady_className},
+set className(a){return this.__shady_className=a}}),za;for(za in D)D[za].enumerable=!1;for(var Aa in E)E[Aa].enumerable=!1;var Ba=v.c||v.j,Ca=Ba?function(){}:function(a){var b=t(a);b.H||(b.H=!0,z(a,E))},Da=Ba?function(){}:function(a){var b=t(a);b.G||(b.G=!0,z(a,D))};function Ea(a,b,c){Ca(a);c=c||null;var d=t(a),e=t(b),f=c?t(c):null;d.previousSibling=c?f.previousSibling:b.__shady_lastChild;if(f=u(d.previousSibling))f.nextSibling=a;if(f=u(d.nextSibling=c))f.previousSibling=a;d.parentNode=b;c?c===e.firstChild&&(e.firstChild=a):(e.lastChild=a,e.firstChild||(e.firstChild=a));e.childNodes=null}
 function Fa(a,b,c){Da(b);var d=t(b);void 0!==d.firstChild&&(d.childNodes=null);if(a.nodeType===Node.DOCUMENT_FRAGMENT_NODE){d=a.__shady_childNodes;for(var e=0;e<d.length;e++)Ea(d[e],b,c);a=t(a);b=void 0!==a.firstChild?null:void 0;a.firstChild=a.lastChild=b;a.childNodes=b}else Ea(a,b,c)}
 function Ga(a,b){var c=t(a);b=t(b);a===b.firstChild&&(b.firstChild=c.nextSibling);a===b.lastChild&&(b.lastChild=c.previousSibling);a=c.previousSibling;var d=c.nextSibling;a&&(t(a).nextSibling=d);d&&(t(d).previousSibling=a);c.parentNode=c.previousSibling=c.nextSibling=void 0;void 0!==b.childNodes&&(b.childNodes=null)}
-function Ha(a){var b=t(a);if(void 0===b.firstChild){b.childNodes=null;var c=b.firstChild=a.__shady_native_firstChild||null;b.lastChild=a.__shady_native_lastChild||null;Da(a);b=c;for(var d;b;b=b.__shady_native_nextSibling)c=t(b),c.parentNode=a,c.nextSibling=b.__shady_native_nextSibling||null,c.previousSibling=d||null,d=b,Ca(b)}};var Ia=window.document,Ja=v.N,Ka=Object.getOwnPropertyDescriptor(Node.prototype,"isConnected"),La=Ka&&Ka.get;function Ma(a){for(var b;b=a.__shady_firstChild;)a.__shady_removeChild(b)}function Na(a){var b=u(a);if(b&&void 0!==b.o){b=a.__shady_childNodes;for(var c=0,d=b.length,e;c<d&&(e=b[c]);c++)Na(e)}if(a=u(a))a.o=void 0}function Oa(a){var b=a;a&&"slot"===a.localName&&(b=(b=(b=u(a))&&b.h)&&b.length?b[0]:Oa(a.__shady_nextSibling));return b}
-function Pa(a,b,c){if(a=(a=u(a))&&a.j)b&&a.addedNodes.push(b),c&&a.removedNodes.push(c),Qa(a)}
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+function Ha(a){var b=t(a);if(void 0===b.firstChild){b.childNodes=null;var c=b.firstChild=a.__shady_native_firstChild||null;b.lastChild=a.__shady_native_lastChild||null;Da(a);b=c;for(var d;b;b=b.__shady_native_nextSibling)c=t(b),c.parentNode=a,c.nextSibling=b.__shady_native_nextSibling||null,c.previousSibling=d||null,d=b,Ca(b)}};var Ia=window.document,Ja=v.J,Ka=Object.getOwnPropertyDescriptor(Node.prototype,"isConnected"),La=Ka&&Ka.get;function Ma(a){for(var b;b=a.__shady_firstChild;)a.__shady_removeChild(b)}function Na(a){var b=u(a);if(b&&void 0!==b.l){b=a.__shady_childNodes;for(var c=0,d=b.length,e;c<d&&(e=b[c]);c++)Na(e)}if(a=u(a))a.l=void 0}function Oa(a){var b=a;a&&"slot"===a.localName&&(b=(b=(b=u(a))&&b.g)&&b.length?b[0]:Oa(a.__shady_nextSibling));return b}
+function Pa(a,b,c){if(a=(a=u(a))&&a.i)b&&a.addedNodes.push(b),c&&a.removedNodes.push(c),Qa(a)}
+var J=A({get parentNode(){var a=u(this);a=a&&a.parentNode;return void 0!==a?a:this.__shady_native_parentNode},get firstChild(){var a=u(this);a=a&&a.firstChild;return void 0!==a?a:this.__shady_native_firstChild},get lastChild(){var a=u(this);a=a&&a.lastChild;return void 0!==a?a:this.__shady_native_lastChild},get nextSibling(){var a=u(this);a=a&&a.nextSibling;return void 0!==a?a:this.__shady_native_nextSibling},get previousSibling(){var a=u(this);a=a&&a.previousSibling;return void 0!==a?a:this.__shady_native_previousSibling},
 get childNodes(){if(w(this)){var a=u(this);if(!a.childNodes){a.childNodes=[];for(var b=this.__shady_firstChild;b;b=b.__shady_nextSibling)a.childNodes.push(b)}var c=a.childNodes}else c=this.__shady_native_childNodes;c.item=function(a){return c[a]};return c},get parentElement(){var a=u(this);(a=a&&a.parentNode)&&a.nodeType!==Node.ELEMENT_NODE&&(a=null);return void 0!==a?a:this.__shady_native_parentElement},get isConnected(){if(La&&La.call(this))return!0;if(this.nodeType==Node.DOCUMENT_FRAGMENT_NODE)return!1;
 var a=this.ownerDocument;if(ua){if(a.__shady_native_contains(this))return!0}else if(a.documentElement&&a.documentElement.__shady_native_contains(this))return!0;for(a=this;a&&!(a instanceof Document);)a=a.__shady_parentNode||(x(a)?a.host:void 0);return!!(a&&a instanceof Document)},get textContent(){if(w(this)){for(var a=[],b=0,c=this.__shady_childNodes,d;d=c[b];b++)d.nodeType!==Node.COMMENT_NODE&&a.push(d.__shady_textContent);return a.join("")}return this.__shady_native_textContent},set textContent(a){if("undefined"===
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-b),a;if(a===this)throw Error("Failed to execute 'appendChild' on 'Node': The new child element contains the parent.");if(b){var c=u(b);c=c&&c.parentNode;if(void 0!==c&&c!==this||void 0===c&&b.__shady_native_parentNode!==this)throw Error("Failed to execute 'insertBefore' on 'Node': The node before which the new node is to be inserted is not a child of this node.");}if(b===a)return a;var d=[],e=(c=y(this))?c.host.localName:G(this),f=a.__shady_parentNode;if(f){var h=G(a);f.__shady_removeChild(a,!!c||
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+a={firstElementChild:{get:function(){X.currentNode=this;return X.firstChild()}},lastElementChild:{get:function(){X.currentNode=this;return X.lastChild()}},children:{get:function(){var a=[];X.currentNode=this;for(var c=X.firstChild();c;)a.push(c),c=X.nextSibling();return wa(a)}},childElementCount:{get:function(){return this.children?this.children.length:0}}};T?(V(Element.prototype,bc),V(Element.prototype,["previousElementSibling","nextElementSibling","innerHTML"]),Object.getOwnPropertyDescriptor(HTMLElement.prototype,
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 this.content:this;ac(b);var d=this.localName||"div";d=this.namespaceURI&&this.namespaceURI!==$b.namespaceURI?$b.createElementNS(this.namespaceURI,d):$b.createElement(d);d.innerHTML=a;for(a="template"===this.localName?d.content:d;d=a.__shady_native_firstChild;)b.__shady_native_insertBefore(d,void 0)}}}));V(Element.prototype,"setAttribute getAttribute hasAttribute removeAttribute focus blur".split(" "));V(Element.prototype,cc);V(HTMLElement.prototype,["focus","blur","contains"]);T&&V(HTMLElement.prototype,
-["parentElement","children","innerHTML"]);window.HTMLTemplateElement&&V(window.HTMLTemplateElement.prototype,["innerHTML"]);T?V(DocumentFragment.prototype,bc):U(DocumentFragment.prototype,a);V(DocumentFragment.prototype,cc);T?(V(DocumentFragment.prototype,bc),V(Document.prototype,["activeElement"])):U(Document.prototype,a);V(Document.prototype,["importNode","getElementById"]);V(Document.prototype,cc)};var ec=B({dispatchEvent:function(a){D();return this.__shady_native_dispatchEvent(a)},addEventListener:Nb,removeEventListener:Pb});var fc=B({get assignedSlot(){var a=this.__shady_parentNode;(a=a&&a.__shady_shadowRoot)&&pb(a);return(a=u(this))&&a.assignedSlot||null}});var gc=null;function H(){gc||(gc=window.ShadyCSS&&window.ShadyCSS.ScopingShim);return gc||null}function Ta(a,b){var c=H();c&&c.unscopeNode(a,b)}function Ra(a,b){var c=H();if(!c)return!0;if(a.nodeType===Node.DOCUMENT_FRAGMENT_NODE){c=!0;a=a.__shady_childNodes;for(var d=0;c&&d<a.length;d++)c=c&&Ra(a[d],b);return c}return a.nodeType!==Node.ELEMENT_NODE?!0:c.currentScopeForNode(a)===b}function G(a){if(a.nodeType!==Node.ELEMENT_NODE)return"";var b=H();return b?b.currentScopeForNode(a):""}
-function Sa(a,b){if(a){a.nodeType===Node.ELEMENT_NODE&&b(a);a=a.__shady_childNodes;for(var c=0,d;c<a.length;c++)d=a[c],d.nodeType===Node.ELEMENT_NODE&&Sa(d,b)}};var hc=window.document;function ic(a,b){if("slot"===b)a=a.__shady_parentNode,na(a)&&I(u(a).root);else if("slot"===a.localName&&"name"===b&&(b=y(a))){if(b.a){O(b);var c=a.T,d=tb(a);if(d!==c){c=b.b[c];var e=c.indexOf(a);0<=e&&c.splice(e,1);c=b.b[d]||(b.b[d]=[]);c.push(a);1<c.length&&(b.b[d]=ub(c))}}I(b)}}
-var jc=B({get previousElementSibling(){var a=u(this);if(a&&void 0!==a.previousSibling){for(a=this.__shady_previousSibling;a&&a.nodeType!==Node.ELEMENT_NODE;)a=a.__shady_previousSibling;return a}return this.__shady_native_previousElementSibling},get nextElementSibling(){var a=u(this);if(a&&void 0!==a.nextSibling){for(a=this.__shady_nextSibling;a&&a.nodeType!==Node.ELEMENT_NODE;)a=a.__shady_nextSibling;return a}return this.__shady_native_nextElementSibling},get slot(){return this.getAttribute("slot")},
-set slot(a){this.__shady_setAttribute("slot",a)},get shadowRoot(){var a=u(this);return a&&a.O||null},get className(){return this.getAttribute("class")||""},set className(a){this.__shady_setAttribute("class",a)},setAttribute:function(a,b){if(this.ownerDocument!==hc)this.__shady_native_setAttribute(a,b);else{var c;(c=H())&&"class"===a?(c.setElementClass(this,b),c=!0):c=!1;c||(this.__shady_native_setAttribute(a,b),ic(this,a))}},removeAttribute:function(a){this.__shady_native_removeAttribute(a);ic(this,
-a)},attachShadow:function(a){if(!this)throw"Must provide a host.";if(!a)throw"Not enough arguments.";return new N(mb,this,a)}});var kc=B({blur:function(){var a=u(this);(a=(a=a&&a.root)&&a.activeElement)?a.__shady_blur():this.__shady_native_blur()}});Wb.forEach(function(a){kc[a]={set:function(b){var c=t(this),d=a.substring(2);c.v[a]&&this.removeEventListener(d,c.v[a]);this.__shady_addEventListener(d,b);c.v[a]=b},get:function(){var b=u(this);return b&&b.v[a]},configurable:!0}});var lc=B({assignedNodes:function(a){if("slot"===this.localName){var b=this.__shady_getRootNode();b&&x(b)&&pb(b);return(b=u(this))?(a&&a.flatten?b.h:b.assignedNodes)||[]:[]}}});var mc=window.document,nc=B({importNode:function(a,b){if(a.ownerDocument!==mc||"template"===a.localName)return this.__shady_native_importNode(a,b);var c=this.__shady_native_importNode(a,!1);if(b){a=a.__shady_childNodes;b=0;for(var d;b<a.length;b++)d=this.__shady_importNode(a[b],!0),c.__shady_appendChild(d)}return c}});var oc=B({addEventListener:Nb.bind(window),removeEventListener:Pb.bind(window)});var Y={};Object.getOwnPropertyDescriptor(HTMLElement.prototype,"parentElement")&&(Y.parentElement=J.parentElement);Object.getOwnPropertyDescriptor(HTMLElement.prototype,"contains")&&(Y.contains=J.contains);Object.getOwnPropertyDescriptor(HTMLElement.prototype,"children")&&(Y.children=K.children);Object.getOwnPropertyDescriptor(HTMLElement.prototype,"innerHTML")&&(Y.innerHTML=jb.innerHTML);
-var pc={EventTarget:[ec],Node:[J,window.EventTarget?null:ec],Text:[fc],Element:[jc,K,fc,!v.c||"innerHTML"in Element.prototype?jb:null,window.HTMLSlotElement?null:lc],HTMLElement:[kc,Y],HTMLSlotElement:[lc],DocumentFragment:[Ya,Za],Document:[nc,Ya,Za,$a],Window:[oc]},qc=v.c?null:["innerHTML","textContent"];function rc(a){var b=a?null:qc,c={},d;for(d in pc)c.D=window[d]&&window[d].prototype,pc[d].forEach(function(c){return function(d){return c.D&&d&&A(c.D,d,a,b)}}(c)),c={D:c.D}};function Z(a){this.node=a}m=Z.prototype;m.addEventListener=function(a,b,c){return this.node.__shady_addEventListener(a,b,c)};m.removeEventListener=function(a,b,c){return this.node.__shady_removeEventListener(a,b,c)};m.appendChild=function(a){return this.node.__shady_appendChild(a)};m.insertBefore=function(a,b){return this.node.__shady_insertBefore(a,b)};m.removeChild=function(a){return this.node.__shady_removeChild(a)};m.replaceChild=function(a,b){return this.node.__shady_replaceChild(a,b)};
+["parentElement","children","innerHTML"]);window.HTMLTemplateElement&&V(window.HTMLTemplateElement.prototype,["innerHTML"]);T?V(DocumentFragment.prototype,bc):U(DocumentFragment.prototype,a);V(DocumentFragment.prototype,cc);T?(V(Document.prototype,bc),V(Document.prototype,["activeElement"])):U(Document.prototype,a);V(Document.prototype,["importNode","getElementById"]);V(Document.prototype,cc)};var ec=A({dispatchEvent:function(a){C();return this.__shady_native_dispatchEvent(a)},addEventListener:Nb,removeEventListener:Pb});var fc=A({get assignedSlot(){var a=this.__shady_parentNode;(a=a&&a.__shady_shadowRoot)&&pb(a);return(a=u(this))&&a.assignedSlot||null}});var gc=null;function H(){gc||(gc=window.ShadyCSS&&window.ShadyCSS.ScopingShim);return gc||null}function Ta(a,b){var c=H();c&&c.unscopeNode(a,b)}function Ra(a,b){var c=H();if(!c)return!0;if(a.nodeType===Node.DOCUMENT_FRAGMENT_NODE){c=!0;a=a.__shady_childNodes;for(var d=0;c&&d<a.length;d++)c=c&&Ra(a[d],b);return c}return a.nodeType!==Node.ELEMENT_NODE?!0:c.currentScopeForNode(a)===b}function G(a){if(a.nodeType!==Node.ELEMENT_NODE)return"";var b=H();return b?b.currentScopeForNode(a):""}
+function Sa(a,b){if(a){a.nodeType===Node.ELEMENT_NODE&&b(a);a=a.__shady_childNodes;for(var c=0,d;c<a.length;c++)d=a[c],d.nodeType===Node.ELEMENT_NODE&&Sa(d,b)}};var hc=window.document;function ic(a,b){if("slot"===b)a=a.__shady_parentNode,na(a)&&I(u(a).root);else if("slot"===a.localName&&"name"===b&&(b=F(a))){if(b.a){O(b);var c=a.N,d=tb(a);if(d!==c){c=b.b[c];var e=c.indexOf(a);0<=e&&c.splice(e,1);c=b.b[d]||(b.b[d]=[]);c.push(a);1<c.length&&(b.b[d]=ub(c))}}I(b)}}
+var jc=A({get previousElementSibling(){var a=u(this);if(a&&void 0!==a.previousSibling){for(a=this.__shady_previousSibling;a&&a.nodeType!==Node.ELEMENT_NODE;)a=a.__shady_previousSibling;return a}return this.__shady_native_previousElementSibling},get nextElementSibling(){var a=u(this);if(a&&void 0!==a.nextSibling){for(a=this.__shady_nextSibling;a&&a.nodeType!==Node.ELEMENT_NODE;)a=a.__shady_nextSibling;return a}return this.__shady_native_nextElementSibling},get slot(){return this.getAttribute("slot")},
+set slot(a){this.__shady_setAttribute("slot",a)},get shadowRoot(){var a=u(this);return a&&a.K||null},get className(){return this.getAttribute("class")||""},set className(a){this.__shady_setAttribute("class",a)},setAttribute:function(a,b){if(this.ownerDocument!==hc)this.__shady_native_setAttribute(a,b);else{var c;(c=H())&&"class"===a?(c.setElementClass(this,b),c=!0):c=!1;c||(this.__shady_native_setAttribute(a,b),ic(this,a))}},removeAttribute:function(a){this.__shady_native_removeAttribute(a);ic(this,
+a)},attachShadow:function(a){if(!this)throw Error("Must provide a host.");if(!a)throw Error("Not enough arguments.");return new N(mb,this,a)}});var kc=A({blur:function(){var a=u(this);(a=(a=a&&a.root)&&a.activeElement)?a.__shady_blur():this.__shady_native_blur()}});Wb.forEach(function(a){kc[a]={set:function(b){var c=t(this),d=a.substring(2);c.o[a]&&this.removeEventListener(d,c.o[a]);this.__shady_addEventListener(d,b);c.o[a]=b},get:function(){var b=u(this);return b&&b.o[a]},configurable:!0}});var lc=A({assignedNodes:function(a){if("slot"===this.localName){var b=this.__shady_getRootNode();b&&x(b)&&pb(b);return(b=u(this))?(a&&a.flatten?b.g:b.assignedNodes)||[]:[]}}});var mc=window.document,nc=A({importNode:function(a,b){if(a.ownerDocument!==mc||"template"===a.localName)return this.__shady_native_importNode(a,b);var c=this.__shady_native_importNode(a,!1);if(b){a=a.__shady_childNodes;b=0;for(var d;b<a.length;b++)d=this.__shady_importNode(a[b],!0),c.__shady_appendChild(d)}return c}});var oc=A({addEventListener:Nb.bind(window),removeEventListener:Pb.bind(window)});var Y={};Object.getOwnPropertyDescriptor(HTMLElement.prototype,"parentElement")&&(Y.parentElement=J.parentElement);Object.getOwnPropertyDescriptor(HTMLElement.prototype,"contains")&&(Y.contains=J.contains);Object.getOwnPropertyDescriptor(HTMLElement.prototype,"children")&&(Y.children=K.children);Object.getOwnPropertyDescriptor(HTMLElement.prototype,"innerHTML")&&(Y.innerHTML=jb.innerHTML);
+var pc={EventTarget:[ec],Node:[J,window.EventTarget?null:ec],Text:[fc],Element:[jc,K,fc,!v.c||"innerHTML"in Element.prototype?jb:null,window.HTMLSlotElement?null:lc],HTMLElement:[kc,Y],HTMLSlotElement:[lc],DocumentFragment:[Ya,Za],Document:[nc,Ya,Za,$a],Window:[oc]},qc=v.c?null:["innerHTML","textContent"];function rc(a){var b=a?null:qc,c={},d;for(d in pc)c.A=window[d]&&window[d].prototype,pc[d].forEach(function(c){return function(d){return c.A&&d&&z(c.A,d,a,b)}}(c)),c={A:c.A}};function Z(a){this.node=a}m=Z.prototype;m.addEventListener=function(a,b,c){return this.node.__shady_addEventListener(a,b,c)};m.removeEventListener=function(a,b,c){return this.node.__shady_removeEventListener(a,b,c)};m.appendChild=function(a){return this.node.__shady_appendChild(a)};m.insertBefore=function(a,b){return this.node.__shady_insertBefore(a,b)};m.removeChild=function(a){return this.node.__shady_removeChild(a)};m.replaceChild=function(a,b){return this.node.__shady_replaceChild(a,b)};
 m.cloneNode=function(a){return this.node.__shady_cloneNode(a)};m.getRootNode=function(a){return this.node.__shady_getRootNode(a)};m.contains=function(a){return this.node.__shady_contains(a)};m.dispatchEvent=function(a){return this.node.__shady_dispatchEvent(a)};m.setAttribute=function(a,b){this.node.__shady_setAttribute(a,b)};m.getAttribute=function(a){return this.node.__shady_native_getAttribute(a)};m.removeAttribute=function(a){this.node.__shady_removeAttribute(a)};m.attachShadow=function(a){return this.node.__shady_attachShadow(a)};
@@ -92,5 +93,5 @@ m.focus=function(){this.node.__shady_native_focus()};m.blur=function(){this.node.__shady_blur()};m.importNode=function(a,b){if(this.node.nodeType===Node.DOCUMENT_NODE)return this.node.__shady_importNode(a,b)};m.getElementById=function(a){if(this.node.nodeType===Node.DOCUMENT_NODE)return this.node.__shady_getElementById(a)};m.querySelector=function(a){return this.node.__shady_querySelector(a)};m.querySelectorAll=function(a,b){return this.node.__shady_querySelectorAll(a,b)};
 a}},textContent:{configurable:!0,enumerable:!0,get:function(){return this.node.__shady_textContent},set:function(a){this.node.__shady_textContent=a}},slot:{configurable:!0,enumerable:!0,get:function(){return this.node.__shady_slot},set:function(a){this.node.__shady_slot=a}}});Wb.forEach(function(a){Object.defineProperty(Z.prototype,a,{get:function(){return this.node["__shady_"+a]},set:function(b){this.node["__shady_"+a]=b},configurable:!0})});var sc=new WeakMap;
-function tc(a){if(x(a)||a instanceof Z)return a;var b=sc.get(a);b||(b=new Z(a),sc.set(a,b));return b};v.J&&(window.ShadyDOM={inUse:v.J,patch:function(a){Da(a);Ca(a);return a},isShadyRoot:x,enqueue:ya,flush:D,settings:v,filterMutations:Ab,observeChildren:yb,unobserveChildren:zb,deferConnectionCallbacks:v.deferConnectionCallbacks,preferPerformance:v.preferPerformance,handlesDynamicScoping:!0,wrap:v.m?tc:function(a){return a},Wrapper:Z,composedPath:Fb,noPatch:v.m,nativeMethods:Xb,nativeTree:Yb},dc(),rc("__shady_"),Object.defineProperty(document,"_activeElement",$a.activeElement),A(Window.prototype,oc,
-"__shady_"),v.m||(rc(),Vb()),Qb(),window.Event=Sb,window.CustomEvent=Tb,window.MouseEvent=Ub,window.ShadowRoot=N);}).call(this);
+function tc(a){if(x(a)||a instanceof Z)return a;var b=sc.get(a);b||(b=new Z(a),sc.set(a,b));return b};v.F&&(window.ShadyDOM={inUse:v.F,patch:function(a){Da(a);Ca(a);return a},isShadyRoot:x,enqueue:ya,flush:C,settings:v,filterMutations:Ab,observeChildren:yb,unobserveChildren:zb,deferConnectionCallbacks:v.deferConnectionCallbacks,preferPerformance:v.preferPerformance,handlesDynamicScoping:!0,wrap:v.j?tc:function(a){return a},Wrapper:Z,composedPath:Fb,noPatch:v.j,nativeMethods:Xb,nativeTree:Yb},dc(),rc("__shady_"),Object.defineProperty(document,"_activeElement",$a.activeElement),z(Window.prototype,oc,
+"__shady_"),v.j||(rc(),Vb()),Qb(),window.Event=Sb,window.CustomEvent=Tb,window.MouseEvent=Ub,window.ShadowRoot=N);}).call(this);
 
 //# sourceMappingURL=shadydom.min.js.map

src/attach-shadow.js

@@ -55,5 +55,7 @@ /**
     this.host = host;
+    /** @type {!string|undefined} */
     this.mode = options && options.mode;
     recordChildNodes(host);
     const hostData = ensureShadyDataForNode(host);
+    /** @type {!ShadyRoot} */
     hostData.root = this;
@@ -87,3 +89,2 @@ hostData.publicRoot = this.mode !== MODE_CLOSED ? this : null;
 
-  // async render
   _asyncRender() {
@@ -127,3 +128,3 @@ if (!this._renderPending) {
     if (root) {
-      root['_renderRoot']();
+      root._renderRoot();
     }
@@ -136,8 +137,8 @@ }
     if (root && root._renderPending) {
-      root['_renderRoot']();
+      root._renderRoot();
     }
   }
 
-  // NOTE: avoid renaming to ease testability.
-  ['_renderRoot']() {
+  /** @override */
+  _renderRoot() {
     // track rendering state.
@@ -196,3 +197,3 @@ const wasRendering = isRendering;
       if (slotParentRoot && (slotParentRoot._hasInsertionPoint() || slotParentRoot._renderPending)) {
-        slotParentRoot['_renderRoot']();
+        slotParentRoot._renderRoot();
       }
@@ -560,6 +561,6 @@ this._addAssignedToFlattenedNodes(slotData.flattenedNodes,
   if (!host) {
-    throw 'Must provide a host.';
+    throw new Error('Must provide a host.');
   }
   if (!options) {
-    throw 'Not enough arguments.'
+    throw new Error('Not enough arguments.');
   }
@@ -612,2 +613,3 @@ return new ShadyRoot(ShadyRootConstructionToken, host, options);
 
+      /** @this {!HTMLElement} */
       base.prototype.connectedCallback = base.prototype.__shadydom_connectedCallback = function() {
@@ -626,2 +628,3 @@ // if rendering defer connected
 
+      /** @this {!HTMLElement} */
       base.prototype.disconnectedCallback = base.prototype.__shadydom_disconnectedCallback = function() {
@@ -670,1 +673,9 @@ // if rendering, cancel a pending connection and queue disconnect,
 }
+
+/** @return {!ShadyRoot|undefined} */
+export const ownerShadyRootForNode = (node) => {
+  let root = node[utils.SHADY_PREFIX + 'getRootNode']();
+  if (utils.isShadyRoot(root)) {
+    return root;
+  }
+}

src/link-nodes.js

@@ -101,3 +101,2 @@ /**
  * @param  {!Node} node
- * @param  {Array<Node>=} nodes
  */
@@ -121,2 +120,2 @@ export const recordChildNodes = (node) => {
   }
-}
+}

src/patch-events.js

@@ -168,3 +168,3 @@ /**
     }
-    return this.__composed || false;
+    return /** @type {!Event} */(this).__composed || false;
   },
@@ -179,3 +179,3 @@
     }
-    return this.__composedPath;
+    return /** @type {!Event} */(this).__composedPath;
   },
@@ -202,3 +202,3 @@
     // find the deepest node in relatedTarget composed path that is in the same root with the currentTarget
-    return retarget(this.currentTarget || this['__previousCurrentTarget'], this.__relatedTargetComposedPath);
+    return retarget(this.currentTarget || this['__previousCurrentTarget'], /** @type {!Event} */(this).__relatedTargetComposedPath);
   },
@@ -354,3 +354,3 @@ /**
 /**
- * @this {Event}
+ * @this {EventTarget}
  */
@@ -463,2 +463,3 @@ export function addEventListener(type, fnOrObj, optionsOrCapture) {
   };
+
   // Store the wrapper information.
@@ -487,3 +488,3 @@ fnOrObj[eventWrappersName].push({
 /**
- * @this {Event}
+ * @this {EventTarget}
  */
@@ -601,2 +602,2 @@ export function removeEventListener(type, fnOrObj, optionsOrCapture) {
 export const eventPropertyNames = Object.getOwnPropertyNames(Document.prototype)
-    .filter(name => name.substring(0,2) === 'on');
+    .filter(name => name.substring(0,2) === 'on');

src/patch-native.js

@@ -21,5 +21,7 @@ /**
 export const nativeMethods = {
+  /** @this {Element} */
   querySelector(selector) {
     return this[NATIVE_PREFIX + 'querySelector'](selector);
   },
+  /** @this {Element} */
   querySelectorAll(selector) {
@@ -70,8 +72,11 @@ return this[NATIVE_PREFIX + 'querySelectorAll'](selector);
 
+/** @type {!TreeWalker} */
 const nodeWalker = document.createTreeWalker(document, NodeFilter.SHOW_ALL,
   null, false);
 
+/** @type {!TreeWalker} */
 const elementWalker = document.createTreeWalker(document, NodeFilter.SHOW_ELEMENT,
   null, false);
 
+/** @type {!Document} */
 const inertDoc = document.implementation.createHTMLDocument('inert');
@@ -130,2 +135,3 @@
       parentNode: {
+        /** @this {Node} */
         get() {
@@ -137,2 +143,3 @@ nodeWalker.currentNode = this;
       firstChild: {
+        /** @this {Node} */
         get() {
@@ -144,2 +151,3 @@ nodeWalker.currentNode = this;
       lastChild: {
+        /** @this {Node} */
         get() {
@@ -152,2 +160,3 @@ nodeWalker.currentNode = this;
       previousSibling: {
+        /** @this {Node} */
         get() {
@@ -159,2 +168,3 @@ nodeWalker.currentNode = this;
       nextSibling: {
+        /** @this {Node} */
         get() {
@@ -167,2 +177,3 @@ nodeWalker.currentNode = this;
       childNodes: {
+        /** @this {Node} */
         get() {
@@ -180,2 +191,3 @@ const nodes = [];
       parentElement: {
+        /** @this {Node} */
         get() {
@@ -187,2 +199,3 @@ elementWalker.currentNode = this;
       textContent: {
+        /** @this {Node} */
         get() {
@@ -209,2 +222,3 @@ /* eslint-disable no-case-declarations */
         // Needed on browsers that do not proper accessors (e.g. old versions of Chrome)
+        /** @this {Node} */
         set(value) {
@@ -245,2 +259,3 @@ if (typeof value === 'undefined' || value === null) {
     firstElementChild: {
+      /** @this {ParentNode} */
       get() {
@@ -252,2 +267,3 @@ elementWalker.currentNode = this;
     lastElementChild: {
+      /** @this {ParentNode} */
       get() {
@@ -259,2 +275,3 @@ elementWalker.currentNode = this;
     children: {
+      /** @this {ParentNode} */
       get() {
@@ -272,4 +289,8 @@ let nodes = [];
     childElementCount: {
+      /** @this {ParentNode} */
       get() {
-        return this.children.length;
+        if (this.children) {
+          return this.children.length;
+        }
+        return 0;
       }
@@ -304,2 +325,3 @@ }
       previousElementSibling: {
+        /** @this {Element} */
         get() {
@@ -311,2 +333,3 @@ elementWalker.currentNode = this;
       nextElementSibling: {
+        /** @this {Element} */
         get() {
@@ -318,2 +341,3 @@ elementWalker.currentNode = this;
       innerHTML: {
+        /** @this {Element} */
         get() {
@@ -323,2 +347,3 @@ return getInnerHTML(this, n => n[NATIVE_PREFIX + 'childNodes']);
         // Needed on browsers that do not proper accessors (e.g. old versions of Chrome)
+        /** @this {Element} */
         set(value) {
@@ -394,3 +419,3 @@ const content = this.localName === 'template' ?
   if (hasDescriptors) {
-    copyProperties(DocumentFragment.prototype, ParentNodeAccessors);
+    copyProperties(Document.prototype, ParentNodeAccessors);
     copyProperties(Document.prototype, [
@@ -409,2 +434,2 @@ 'activeElement'
 
-};
+};

src/patch-prototypes.js

@@ -70,2 +70,3 @@ /**
 
+/** @param {string=} prefix */
 export const applyPatches = (prefix) => {
@@ -92,2 +93,2 @@ const disallowed = prefix ? null : disallowedNativePatches;
   utils.patchProperties(Window.prototype, WindowPatches, utils.SHADY_PREFIX);
-};
+};

src/patch-shadyRoot.js

@@ -20,2 +20,6 @@ /**
 
+/**
+ * @param {!Object} proto
+ * @param {string=} prefix
+ */
 const patchShadyAccessors = (proto, prefix) => {
@@ -91,2 +95,3 @@ utils.patchProperties(proto, ShadowRootPatches, prefix);
     Object.defineProperty(proto, prop, {
+      /** @this {ShadowRoot} */
       get() {
@@ -98,2 +103,2 @@ return this.host[prop];
   });
-}
+}

src/patches/DocumentOrShadowRoot.js

@@ -12,2 +12,3 @@ /**
 import * as utils from '../utils.js';
+import {ownerShadyRootForNode} from '../attach-shadow.js';
 
@@ -51,6 +52,6 @@ function getDocumentActiveElement() {
     // find the active element's most shallow host within it.
-    let activeRoot = utils.ownerShadyRootForNode(active);
+    let activeRoot = ownerShadyRootForNode(active);
     while (activeRoot && activeRoot !== this) {
       active = activeRoot.host;
-      activeRoot = utils.ownerShadyRootForNode(active);
+      activeRoot = ownerShadyRootForNode(active);
     }
@@ -57,0 +58,0 @@ if (this === document) {

src/patches/Element.js

@@ -14,3 +14,3 @@ /**
 import {shadyDataForNode} from '../shady-data.js';
-import {attachShadow} from '../attach-shadow.js';
+import {attachShadow, ownerShadyRootForNode} from '../attach-shadow.js';
 
@@ -33,3 +33,3 @@ const doc = window.document;
   } else if (node.localName === 'slot' && name === 'name') {
-    let root = utils.ownerShadyRootForNode(node);
+    let root = ownerShadyRootForNode(node);
     if (root) {
@@ -129,3 +129,3 @@ root._updateSlotName(node);
    * @this {Element}
-   * @param {object} options
+   * @param {!{mode: string}} options
    */
@@ -136,2 +136,2 @@ attachShadow(options) {
 
-});
+});

src/patches/ElementOrShadowRoot.js

@@ -15,2 +15,3 @@ /**
 
+/** @type {!Document} */
 const inertDoc = document.implementation.createHTMLDocument('inert');
@@ -59,2 +60,2 @@
 
-});
+});

src/patches/Node.js

@@ -16,2 +16,3 @@ /**
 import {recordInsertBefore, recordRemoveChild} from '../link-nodes.js';
+import {ownerShadyRootForNode} from '../attach-shadow.js';
 
@@ -268,4 +269,3 @@ const doc = window.document;
     const slotsAdded = [];
-    /** @type {function(!Node, string): void} */
-    const ownerRoot = utils.ownerShadyRootForNode(this);
+    const ownerRoot = ownerShadyRootForNode(this);
     /** @type {string} */
@@ -280,3 +280,3 @@ const newScopeName = ownerRoot ? ownerRoot.host.localName : currentScopeForNode(this);
       parentNode[utils.SHADY_PREFIX + 'removeChild'](node,
-        Boolean(ownerRoot) || !utils.ownerShadyRootForNode(node));
+        Boolean(ownerRoot) || !ownerShadyRootForNode(node));
     }
@@ -382,3 +382,3 @@ // add to new parent
     let preventNativeRemove;
-    let ownerRoot = utils.ownerShadyRootForNode(node);
+    let ownerRoot = ownerShadyRootForNode(node);
     let removingInsertionPoint;
@@ -466,3 +466,3 @@ const parentData = shadyDataForNode(this);
   /**
-   * @param {Node} this
+   * @this {Node}
    * @param {Object=} options
@@ -498,3 +498,3 @@ */
 
-  /** @param {Node} this */
+  /** @this {Node} */
   contains(node) {
@@ -504,2 +504,2 @@ return utils.contains(this, node);
 
-});
+});

src/patches/ParentNode.js

@@ -91,3 +91,7 @@ /**
   get childElementCount() {
-    return this[utils.SHADY_PREFIX + 'children'].length;
+    let children = this[utils.SHADY_PREFIX + 'children'];
+    if(children) {
+      return children.length;
+    }
+    return 0;
   }
@@ -94,0 +98,0 @@

src/patches/ShadowRoot.js

@@ -18,4 +18,4 @@ /**
    * @param {string} type
-   * @param {function} fn
-   * @param {object|boolean} optionsOrCapture
+   * @param {Function} fn
+   * @param {Object|boolean=} optionsOrCapture
    */
@@ -35,4 +35,4 @@ addEventListener(type, fn, optionsOrCapture) {
    * @param {string} type
-   * @param {function} fn
-   * @param {object|boolean} optionsOrCapture
+   * @param {Function} fn
+   * @param {Object|boolean=} optionsOrCapture
    */
@@ -49,2 +49,2 @@ removeEventListener(type, fn, optionsOrCapture) {
 
-});
+});

src/patches/Slot.js

@@ -18,3 +18,3 @@ /**
    * @this {HTMLSlotElement}
-   * @param {object} options
+   * @param {Object=} options
    */
@@ -37,2 +37,2 @@ assignedNodes(options) {
 
-});
+});

src/patches/Slotable.js

@@ -16,2 +16,3 @@ /**
 
+  /** @this {Node} */
   get assignedSlot() {
@@ -29,2 +30,2 @@ // Force any parent's shadowRoot to flush so that distribution occurs
 
-});
+});

src/shady-data.js

@@ -48,2 +48,3 @@ /**
 
+  /** @override */
   toJSON() {
@@ -50,0 +51,0 @@ return {};

src/shadydom.js

@@ -128,3 +128,3 @@ /**
 
-  window.ShadowRoot = ShadyRoot;
+  window.ShadowRoot = /** @type {function(new:ShadowRoot)} */(ShadyRoot);
 }

src/utils.js

@@ -12,2 +12,3 @@ /**
 
+/** @type {!Object} */
 export const settings = window['ShadyDOM'] || {};
@@ -33,9 +34,2 @@
 
-export const ownerShadyRootForNode = (node) => {
-  let root = node[SHADY_PREFIX + 'getRootNode']();
-  if (isShadyRoot(root)) {
-    return root;
-  }
-}
-
 export const hasShadowRootWithSlot = (node) => {
@@ -139,8 +133,9 @@ const nodeData = shadyDataForNode(node);
 
-// patch a group of accessors on an object only if it exists or if the `force`
-// argument is true.
+
 /**
- * @param {!Object} obj
+ * Patch a group of accessors on an object only if it exists or if the `force`
+ * argument is true.
+ * @param {!Object} proto
  * @param {!Object} descriptors
- * @param {boolean=} force
+ * @param {string=} prefix
  * @param {Array=} disallowedPatches
@@ -172,2 +167,3 @@ */
 
+/** @type {!function(new:HTMLElement)} */
 export const NativeHTMLElement =
@@ -178,2 +174,3 @@ (window['customElements'] && window['customElements']['nativeHTMLElement']) ||
 // note, this is not a perfect polyfill since it doesn't include symbols
+/** @return {!Object<!ObjectPropertyDescriptor>} */
 export const getOwnPropertyDescriptors = (obj) => {
@@ -180,0 +177,0 @@ const descriptors = {};

src/wrapper.js

@@ -17,2 +17,3 @@ /**
 
+  /** @param {!Node} node */
   constructor(node) {
@@ -86,2 +87,3 @@ this.node = node;
 
+  /** @return {!Node|undefined} */
   get activeElement() {
@@ -94,5 +96,9 @@ if (utils.isShadyRoot(this.node) || this.node.nodeType === Node.DOCUMENT_NODE) {
 
-  // Installed for compatibility with browsers (older Chrome/Safari) that do
-  // not have a configurable `activeElement` accessor. Enables noPatch and
-  // patch mode both to consistently use ShadyDOM.wrap(document)._activeElement.
+  /**
+   * Installed for compatibility with browsers (older Chrome/Safari) that do
+   * not have a configurable `activeElement` accessor. Enables noPatch and
+   * patch mode both to consistently use ShadyDOM.wrap(document)._activeElement.
+   * @override
+   * @return {!Node|undefined}
+   */
   get _activeElement() {
@@ -103,2 +109,3 @@ return this.activeElement;
   // NOTE: not needed, just here for balance
+  /** @override */
   focus() {
@@ -143,3 +150,3 @@ this.node[utils.NATIVE_PREFIX + 'focus']();
     if (utils.isShadyRoot(this.node)) {
-      return this.node.host;
+      return /** @type {!ShadowRoot} */(this.node).host;
     }
@@ -240,5 +247,7 @@ }
   Object.defineProperty(Wrapper.prototype, name, {
+    /** @this {Wrapper} */
     get() {
       return this.node[utils.SHADY_PREFIX + name];
     },
+    /** @this {Wrapper} */
     set(value) {
@@ -266,2 +275,2 @@ this.node[utils.SHADY_PREFIX + name] = value;
   return wrapper;
-}
+}

No alert changes

Improved metrics

Total package byte prevSize

439056

increased by0.99%

Lines of code

4415

increased by1.87%

No dependency changes