/**

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* @output wp-includes/js/wp-embed-template.js

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*/

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(function ( window, document ) {

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'use strict';

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var supportedBrowser = ( document.querySelector && window.addEventListener ),

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loaded = false,

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secret,

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secretTimeout,

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resizing;

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function sendEmbedMessage( message, value ) {

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window.parent.postMessage( {

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message: message,

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value: value,

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secret: secret

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}, '*' );

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}

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/**

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* Send the height message to the parent window.

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*/

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function sendHeightMessage() {

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sendEmbedMessage( 'height', Math.ceil( document.body.getBoundingClientRect().height ) );

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}

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function onLoad() {

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if ( loaded ) {

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return;

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}

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loaded = true;

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var share_dialog = document.querySelector( '.wp-embed-share-dialog' ),

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share_dialog_open = document.querySelector( '.wp-embed-share-dialog-open' ),

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share_dialog_close = document.querySelector( '.wp-embed-share-dialog-close' ),

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share_input = document.querySelectorAll( '.wp-embed-share-input' ),

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share_dialog_tabs = document.querySelectorAll( '.wp-embed-share-tab-button button' ),

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featured_image = document.querySelector( '.wp-embed-featured-image img' ),

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i;

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if ( share_input ) {

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for ( i = 0; i < share_input.length; i++ ) {

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share_input[ i ].addEventListener( 'click', function ( e ) {

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e.target.select();

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} );

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}

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}

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function openSharingDialog() {

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share_dialog.className = share_dialog.className.replace( 'hidden', '' );

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// Initial focus should go on the currently selected tab in the dialog.

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document.querySelector( '.wp-embed-share-tab-button [aria-selected="true"]' ).focus();

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}

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function closeSharingDialog() {

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share_dialog.className += ' hidden';

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document.querySelector( '.wp-embed-share-dialog-open' ).focus();

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}

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if ( share_dialog_open ) {

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share_dialog_open.addEventListener( 'click', function () {

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openSharingDialog();

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} );

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}

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if ( share_dialog_close ) {

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share_dialog_close.addEventListener( 'click', function () {

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closeSharingDialog();

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} );

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}

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function shareClickHandler( e ) {

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var currentTab = document.querySelector( '.wp-embed-share-tab-button [aria-selected="true"]' );

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currentTab.setAttribute( 'aria-selected', 'false' );

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document.querySelector( '#' + currentTab.getAttribute( 'aria-controls' ) ).setAttribute( 'aria-hidden', 'true' );

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e.target.setAttribute( 'aria-selected', 'true' );

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document.querySelector( '#' + e.target.getAttribute( 'aria-controls' ) ).setAttribute( 'aria-hidden', 'false' );

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}

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function shareKeyHandler( e ) {

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var target = e.target,

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previousSibling = target.parentElement.previousElementSibling,

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nextSibling = target.parentElement.nextElementSibling,

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newTab, newTabChild;

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if ( 37 === e.keyCode ) {

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newTab = previousSibling;

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} else if ( 39 === e.keyCode ) {

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newTab = nextSibling;

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} else {

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return false;

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}

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if ( 'rtl' === document.documentElement.getAttribute( 'dir' ) ) {

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newTab = ( newTab === previousSibling ) ? nextSibling : previousSibling;

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}

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if ( newTab ) {

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newTabChild = newTab.firstElementChild;

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target.setAttribute( 'tabindex', '-1' );

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target.setAttribute( 'aria-selected', false );

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document.querySelector( '#' + target.getAttribute( 'aria-controls' ) ).setAttribute( 'aria-hidden', 'true' );

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newTabChild.setAttribute( 'tabindex', '0' );

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newTabChild.setAttribute( 'aria-selected', 'true' );

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newTabChild.focus();

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document.querySelector( '#' + newTabChild.getAttribute( 'aria-controls' ) ).setAttribute( 'aria-hidden', 'false' );

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}

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}

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if ( share_dialog_tabs ) {

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for ( i = 0; i < share_dialog_tabs.length; i++ ) {

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share_dialog_tabs[ i ].addEventListener( 'click', shareClickHandler );

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share_dialog_tabs[ i ].addEventListener( 'keydown', shareKeyHandler );

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}

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}

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document.addEventListener( 'keydown', function ( e ) {

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if ( 27 === e.keyCode && -1 === share_dialog.className.indexOf( 'hidden' ) ) {

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closeSharingDialog();

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} else if ( 9 === e.keyCode ) {

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constrainTabbing( e );

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}

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}, false );

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function constrainTabbing( e ) {

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// Need to re-get the selected tab each time.

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var firstFocusable = document.querySelector( '.wp-embed-share-tab-button [aria-selected="true"]' );

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if ( share_dialog_close === e.target && ! e.shiftKey ) {

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firstFocusable.focus();

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e.preventDefault();

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} else if ( firstFocusable === e.target && e.shiftKey ) {

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share_dialog_close.focus();

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e.preventDefault();

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}

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}

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if ( window.self === window.top ) {

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return;

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}

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// Send this document's height to the parent (embedding) site.

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sendHeightMessage();

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// Send the document's height again after the featured image has been loaded.

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if ( featured_image ) {

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featured_image.addEventListener( 'load', sendHeightMessage );

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}

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/**

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* Detect clicks to external (_top) links.

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*/

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function linkClickHandler( e ) {

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var target = e.target,

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href;

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if ( target.hasAttribute( 'href' ) ) {

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href = target.getAttribute( 'href' );

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} else {

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href = target.parentElement.getAttribute( 'href' );

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}

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// Only catch clicks from the primary mouse button, without any modifiers.

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if ( event.altKey || event.ctrlKey || event.metaKey || event.shiftKey ) {

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return;

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}

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// Send link target to the parent (embedding) site.

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if ( href ) {

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sendEmbedMessage( 'link', href );

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e.preventDefault();

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}

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}

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document.addEventListener( 'click', linkClickHandler );

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}

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/**

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* Iframe resize handler.

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*/

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function onResize() {

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if ( window.self === window.top ) {

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return;

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}

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clearTimeout( resizing );

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resizing = setTimeout( sendHeightMessage, 100 );

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}

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/**

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* Message handler.

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*

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* @param {MessageEvent} event

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*/

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function onMessage( event ) {

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var data = event.data;

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if ( ! data ) {

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return;

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}

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if ( event.source !== window.parent ) {

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return;

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}

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if ( ! ( data.secret || data.message ) ) {

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return;

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}

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if ( data.secret !== secret ) {

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return;

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}

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if ( 'ready' === data.message ) {

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sendHeightMessage();

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}

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}

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/**

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* Re-get the secret when it was added later on.

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*/

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function getSecret() {

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if ( window.self === window.top || !!secret ) {

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return;

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}

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secret = window.location.hash.replace( /.*secret=([\d\w]{10}).*/, '$1' );

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clearTimeout( secretTimeout );

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secretTimeout = setTimeout( function () {

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getSecret();

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}, 100 );

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}

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if ( supportedBrowser ) {

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getSecret();

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document.documentElement.className = document.documentElement.className.replace( /\bno-js\b/, '' ) + ' js';

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document.addEventListener( 'DOMContentLoaded', onLoad, false );

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window.addEventListener( 'load', onLoad, false );

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window.addEventListener( 'resize', onResize, false );

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window.addEventListener( 'message', onMessage, false );

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}

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})( window, document );

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