!function(e,t){"object"==typeof exports&&"undefined"!=typeof module?t():"function"==typeof define&&define.amd?define("inert",t):t()}(0,(function(){"use strict";var e=function(){function e(e,t){for(var n=0;n<t.length;n++){var i=t[n];i.enumerable=i.enumerable||!1,i.configurable=!0,"value"in i&&(i.writable=!0),Object.defineProperty(e,i.key,i)}}return function(t,n,i){return n&&e(t.prototype,n),i&&e(t,i),t}}();function t(e,t){if(!(e instanceof t))throw new TypeError("Cannot call a class as a function")}!function(){if("undefined"!=typeof window){var n=Array.prototype.slice,i=Element.prototype.matches||Element.prototype.msMatchesSelector,o=["a[href]","area[href]","input:not([disabled])","select:not([disabled])","textarea:not([disabled])","button:not([disabled])","details","summary","iframe","object","embed","[contenteditable]"].join(","),r=function(){function r(e,n){t(this,r),this._inertManager=n,this._rootElement=e,this._managedNodes=new Set,this._rootElement.hasAttribute("aria-hidden")?this._savedAriaHidden=this._rootElement.getAttribute("aria-hidden"):this._savedAriaHidden=null,this._rootElement.setAttribute("aria-hidden","true"),this._makeSubtreeUnfocusable(this._rootElement),this._observer=new MutationObserver(this._onMutation.bind(this)),this._observer.observe(this._rootElement,{attributes:!0,childList:!0,subtree:!0})}return e(r,[{key:"destructor",value:function(){this._observer.disconnect(),this._rootElement&&(null!==this._savedAriaHidden?this._rootElement.setAttribute("aria-hidden",this._savedAriaHidden):this._rootElement.removeAttribute("aria-hidden")),this._managedNodes.forEach((function(e){this._unmanageNode(e.node)}),this),this._observer=null,this._rootElement=null,this._managedNodes=null,this._inertManager=null}},{key:"_makeSubtreeUnfocusable",value:function(e){var t=this;u(e,(function(e){return t._visitNode(e)}));var n=document.activeElement;if(!document.body.contains(e)){for(var i=e,o=void 0;i;){if(i.nodeType===Node.DOCUMENT_FRAGMENT_NODE){o=i;break}i=i.parentNode}o&&(n=o.activeElement)}e.contains(n)&&(n.blur(),n===document.activeElement&&document.body.focus())}},{key:"_visitNode",value:function(e){if(e.nodeType===Node.ELEMENT_NODE){var t=e;t!==this._rootElement&&t.hasAttribute("inert")&&this._adoptInertRoot(t),(i.call(t,o)||t.hasAttribute("tabindex"))&&this._manageNode(t)}}},{key:"_manageNode",value:function(e){var t=this._inertManager.register(e,this);this._managedNodes.add(t)}},{key:"_unmanageNode",value:function(e){var t=this._inertManager.deregister(e,this);t&&this._managedNodes.delete(t)}},{key:"_unmanageSubtree",value:function(e){var t=this;u(e,(function(e){return t._unmanageNode(e)}))}},{key:"_adoptInertRoot",value:function(e){var t=this._inertManager.getInertRoot(e);t||(this._inertManager.setInert(e,!0),t=this._inertManager.getInertRoot(e)),t.managedNodes.forEach((function(e){this._manageNode(e.node)}),this)}},{key:"_onMutation",value:function(e,t){e.forEach((function(e){var t=e.target;if("childList"===e.type)n.call(e.addedNodes).forEach((function(e){this._makeSubtreeUnfocusable(e)}),this),n.call(e.removedNodes).forEach((function(e){this._unmanageSubtree(e)}),this);else if("attributes"===e.type)if("tabindex"===e.attributeName)this._manageNode(t);else if(t!==this._rootElement&&"inert"===e.attributeName&&t.hasAttribute("inert")){this._adoptInertRoot(t);var i=this._inertManager.getInertRoot(t);this._managedNodes.forEach((function(e){t.contains(e.node)&&i._manageNode(e.node)}))}}),this)}},{key:"managedNodes",get:function(){return new Set(this._managedNodes)}},{key:"hasSavedAriaHidden",get:function(){return null!==this._savedAriaHidden}},{key:"savedAriaHidden",set:function(e){this._savedAriaHidden=e},get:function(){return this._savedAriaHidden}}]),r}(),s=function(){function n(e,i){t(this,n),this._node=e,this._overrodeFocusMethod=!1,this._inertRoots=new Set([i]),this._savedTabIndex=null,this._destroyed=!1,this.ensureUntabbable()}return e(n,[{key:"destructor",value:function(){if(this._throwIfDestroyed(),this._node&&this._node.nodeType===Node.ELEMENT_NODE){var e=this._node;null!==this._savedTabIndex?e.setAttribute("tabindex",this._savedTabIndex):e.removeAttribute("tabindex"),this._overrodeFocusMethod&&delete e.focus}this._node=null,this._inertRoots=null,this._destroyed=!0}},{key:"_throwIfDestroyed",value:function(){if(this.destroyed)throw new Error("Trying to access destroyed InertNode")}},{key:"ensureUntabbable",value:function(){if(this.node.nodeType===Node.ELEMENT_NODE){var e=this.node;if(i.call(e,o)){if(-1===e.tabIndex&&this.hasSavedTabIndex)return;e.hasAttribute("tabindex")&&(this._savedTabIndex=e.tabIndex),e.setAttribute("tabindex","-1"),e.nodeType===Node.ELEMENT_NODE&&(e.focus=function(){},this._overrodeFocusMethod=!0)}else e.hasAttribute("tabindex")&&(this._savedTabIndex=e.tabIndex,e.removeAttribute("tabindex"))}}},{key:"addInertRoot",value:function(e){this._throwIfDestroyed(),this._inertRoots.add(e)}},{key:"removeInertRoot",value:function(e){this._throwIfDestroyed(),this._inertRoots.delete(e),0===this._inertRoots.size&&this.destructor()}},{key:"destroyed",get:function(){return this._destroyed}},{key:"hasSavedTabIndex",get:function(){return null!==this._savedTabIndex}},{key:"node",get:function(){return this._throwIfDestroyed(),this._node}},{key:"savedTabIndex",set:function(e){this._throwIfDestroyed(),this._savedTabIndex=e},get:function(){return this._throwIfDestroyed(),this._savedTabIndex}}]),n}(),a=function(){function o(e){if(t(this,o),!e)throw new Error("Missing required argument; InertManager needs to wrap a document.");this._document=e,this._managedNodes=new Map,this._inertRoots=new Map,this._observer=new MutationObserver(this._watchForInert.bind(this)),h(e.head||e.body||e.documentElement),"loading"===e.readyState?e.addEventListener("DOMContentLoaded",this._onDocumentLoaded.bind(this)):this._onDocumentLoaded()}return e(o,[{key:"setInert",value:function(e,t){if(t){if(this._inertRoots.has(e))return;var n=new r(e,this);if(e.setAttribute("inert",""),this._inertRoots.set(e,n),!this._document.body.contains(e))for(var i=e.parentNode;i;)11===i.nodeType&&h(i),i=i.parentNode}else{if(!this._inertRoots.has(e))return;this._inertRoots.get(e).destructor(),this._inertRoots.delete(e),e.removeAttribute("inert")}}},{key:"getInertRoot",value:function(e){return this._inertRoots.get(e)}},{key:"register",value:function(e,t){var n=this._managedNodes.get(e);return void 0!==n?n.addInertRoot(t):n=new s(e,t),this._managedNodes.set(e,n),n}},{key:"deregister",value:function(e,t){var n=this._managedNodes.get(e);return n?(n.removeInertRoot(t),n.destroyed&&this._managedNodes.delete(e),n):null}},{key:"_onDocumentLoaded",value:function(){n.call(this._document.querySelectorAll("[inert]")).forEach((function(e){this.setInert(e,!0)}),this),this._observer.observe(this._document.body||this._document.documentElement,{attributes:!0,subtree:!0,childList:!0})}},{key:"_watchForInert",value:function(e,t){var o=this;e.forEach((function(e){switch(e.type){case"childList":n.call(e.addedNodes).forEach((function(e){if(e.nodeType===Node.ELEMENT_NODE){var t=n.call(e.querySelectorAll("[inert]"));i.call(e,"[inert]")&&t.unshift(e),t.forEach((function(e){this.setInert(e,!0)}),o)}}),o);break;case"attributes":if("inert"!==e.attributeName)return;var t=e.target,r=t.hasAttribute("inert");o.setInert(t,r)}}),this)}}]),o}();if(!HTMLElement.prototype.hasOwnProperty("inert")){var d=new a(document);Object.defineProperty(HTMLElement.prototype,"inert",{enumerable:!0,get:function(){return this.hasAttribute("inert")},set:function(e){d.setInert(this,e)}})}}function u(e,t,n){if(e.nodeType==Node.ELEMENT_NODE){var i=e;t&&t(i);var o=i.shadowRoot;if(o)return void u(o,t,o);if("content"==i.localName){for(var r=i,s=r.getDistributedNodes?r.getDistributedNodes():[],a=0;a<s.length;a++)u(s[a],t,n);return}if("slot"==i.localName){for(var d=i,h=d.assignedNodes?d.assignedNodes({flatten:!0}):[],c=0;c<h.length;c++)u(h[c],t,n);return}}for(var l=e.firstChild;null!=l;)u(l,t,n),l=l.nextSibling}function h(e){if(!e.querySelector("style#inert-style, link#inert-style")){var t=document.createElement("style");t.setAttribute("id","inert-style"),t.textContent="\n[inert] {\n  pointer-events: none;\n  cursor: default;\n}\n\n[inert], [inert] * {\n  -webkit-user-select: none;\n  -moz-user-select: none;\n  -ms-user-select: none;\n  user-select: none;\n}\n",e.appendChild(t)}}}()}));