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This ensures that a standard header is shown on the front page whenever a header video is set without a header image if the video doesn't load, e.g., on mobile sizes or if the JS doesn't fire. This adds a new class, `.has-header-video` that is added whenever the `wp-custom-header-video-loaded` event is fired, which is then used to style the custom headers along with `.has-header-image` whenever a header image is available. This also changes the class name on the custom header media wrapping `div` from `.custom-header-image` to `.custom-header-media`. Props laurelfulford, joemcgill. Fixes #38995. Built from https://develop.svn.wordpress.org/trunk@39413 git-svn-id: http://core.svn.wordpress.org/trunk@39353 1a063a9b-81f0-0310-95a4-ce76da25c4cd
250 lines
7.5 KiB
JavaScript
250 lines
7.5 KiB
JavaScript
/* global twentyseventeenScreenReaderText */
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(function( $ ) {
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// Variables and DOM Caching.
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var $body = $( 'body' ),
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$customHeader = $body.find( '.custom-header' ),
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$branding = $customHeader.find( '.site-branding' ),
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$navigation = $body.find( '.navigation-top' ),
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$navWrap = $navigation.find( '.wrap' ),
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$navMenuItem = $navigation.find( '.menu-item' ),
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$menuToggle = $navigation.find( '.menu-toggle' ),
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$menuScrollDown = $body.find( '.menu-scroll-down' ),
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$sidebar = $body.find( '#secondary' ),
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$entryContent = $body.find( '.entry-content' ),
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$formatQuote = $body.find( '.format-quote blockquote' ),
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isFrontPage = $body.hasClass( 'twentyseventeen-front-page' ) || $body.hasClass( 'home blog' ),
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navigationFixedClass = 'site-navigation-fixed',
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navigationHeight,
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navigationOuterHeight,
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navPadding,
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navMenuItemHeight,
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idealNavHeight,
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navIsNotTooTall,
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headerOffset,
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menuTop = 0,
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resizeTimer;
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// Ensure the sticky navigation doesn't cover current focused links.
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$( 'a[href], area[href], input:not([disabled]), select:not([disabled]), textarea:not([disabled]), button:not([disabled]), iframe, object, embed, [tabindex], [contenteditable]', '.site-content-contain' ).filter( ':visible' ).focus( function() {
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if ( $navigation.hasClass( 'site-navigation-fixed' ) ) {
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var windowScrollTop = $( window ).scrollTop(),
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fixedNavHeight = $navigation.height(),
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itemScrollTop = $( this ).offset().top,
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offsetDiff = itemScrollTop - windowScrollTop;
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// Account for Admin bar.
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if ( $( '#wpadminbar' ).length ) {
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offsetDiff -= $( '#wpadminbar' ).height();
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}
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if ( offsetDiff < fixedNavHeight ) {
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$( window ).scrollTo( itemScrollTop - ( fixedNavHeight + 50 ), 0 );
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}
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}
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});
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// Set properties of navigation.
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function setNavProps() {
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navigationHeight = $navigation.height();
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navigationOuterHeight = $navigation.outerHeight();
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navPadding = parseFloat( $navWrap.css( 'padding-top' ) ) * 2;
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navMenuItemHeight = $navMenuItem.outerHeight() * 2;
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idealNavHeight = navPadding + navMenuItemHeight;
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navIsNotTooTall = navigationHeight <= idealNavHeight;
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}
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// Make navigation 'stick'.
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function adjustScrollClass() {
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// Make sure we're not on a mobile screen.
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if ( 'none' === $menuToggle.css( 'display' ) ) {
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// Make sure the nav isn't taller than two rows.
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if ( navIsNotTooTall ) {
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// When there's a custom header image or video, the header offset includes the height of the navigation.
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if ( isFrontPage && ( $body.hasClass( 'has-header-image' ) || $body.hasClass( 'has-header-video' ) ) ) {
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headerOffset = $customHeader.innerHeight() - navigationOuterHeight;
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} else {
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headerOffset = $customHeader.innerHeight();
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}
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// If the scroll is more than the custom header, set the fixed class.
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if ( $( window ).scrollTop() >= headerOffset ) {
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$navigation.addClass( navigationFixedClass );
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} else {
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$navigation.removeClass( navigationFixedClass );
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}
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} else {
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// Remove 'fixed' class if nav is taller than two rows.
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$navigation.removeClass( navigationFixedClass );
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}
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}
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}
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// Set margins of branding in header.
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function adjustHeaderHeight() {
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if ( 'none' === $menuToggle.css( 'display' ) ) {
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// The margin should be applied to different elements on front-page or home vs interior pages.
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if ( isFrontPage ) {
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$branding.css( 'margin-bottom', navigationOuterHeight );
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} else {
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$customHeader.css( 'margin-bottom', navigationOuterHeight );
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}
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} else {
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$customHeader.css( 'margin-bottom', '0' );
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$branding.css( 'margin-bottom', '0' );
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}
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}
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// Set icon for quotes.
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function setQuotesIcon() {
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$( twentyseventeenScreenReaderText.quote ).prependTo( $formatQuote );
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}
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// Add 'below-entry-meta' class to elements.
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function belowEntryMetaClass( param ) {
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var sidebarPos, sidebarPosBottom;
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if ( ! $body.hasClass( 'has-sidebar' ) || (
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$body.hasClass( 'search' ) ||
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$body.hasClass( 'single-attachment' ) ||
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$body.hasClass( 'error404' ) ||
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$body.hasClass( 'twentyseventeen-front-page' )
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) ) {
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return;
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}
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sidebarPos = $sidebar.offset();
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sidebarPosBottom = sidebarPos.top + ( $sidebar.height() + 28 );
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$entryContent.find( param ).each( function() {
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var $element = $( this ),
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elementPos = $element.offset(),
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elementPosTop = elementPos.top;
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// Add 'below-entry-meta' to elements below the entry meta.
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if ( elementPosTop > sidebarPosBottom ) {
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$element.addClass( 'below-entry-meta' );
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} else {
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$element.removeClass( 'below-entry-meta' );
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}
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});
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}
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/*
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* Test if inline SVGs are supported.
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* @link https://github.com/Modernizr/Modernizr/
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*/
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function supportsInlineSVG() {
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var div = document.createElement( 'div' );
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div.innerHTML = '<svg/>';
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return 'http://www.w3.org/2000/svg' === ( 'undefined' !== typeof SVGRect && div.firstChild && div.firstChild.namespaceURI );
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}
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/**
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* Test if an iOS device.
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*/
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function checkiOS() {
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return /iPad|iPhone|iPod/.test(navigator.userAgent) && ! window.MSStream;
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}
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/*
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* Test if background-attachment: fixed is supported.
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* @link http://stackoverflow.com/questions/14115080/detect-support-for-background-attachment-fixed
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*/
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function supportsFixedBackground() {
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var el = document.createElement('div'),
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isSupported;
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try {
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if ( ! ( 'backgroundAttachment' in el.style ) || checkiOS() ) {
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return false;
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}
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el.style.backgroundAttachment = 'fixed';
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isSupported = ( 'fixed' === el.style.backgroundAttachment );
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return isSupported;
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}
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catch (e) {
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return false;
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}
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}
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// Fire on document ready.
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$( document ).ready( function() {
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// If navigation menu is present on page, setNavProps and adjustScrollClass.
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if ( $navigation.length ) {
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setNavProps();
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adjustScrollClass();
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}
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// If 'Scroll Down' arrow in present on page, calculate scroll offset and bind an event handler to the click event.
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if ( $menuScrollDown.length ) {
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if ( $( 'body' ).hasClass( 'admin-bar' ) ) {
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menuTop -= 32;
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}
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if ( $( 'body' ).hasClass( 'blog' ) ) {
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menuTop -= 30; // The div for latest posts has no space above content, add some to account for this.
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}
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if ( ! $navigation.length ) {
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navigationOuterHeight = 0;
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}
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$menuScrollDown.click( function( e ) {
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e.preventDefault();
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$( window ).scrollTo( '#primary', {
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duration: 600,
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offset: { top: menuTop - navigationOuterHeight }
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});
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});
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}
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adjustHeaderHeight();
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setQuotesIcon();
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if ( true === supportsInlineSVG() ) {
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document.documentElement.className = document.documentElement.className.replace( /(\s*)no-svg(\s*)/, '$1svg$2' );
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}
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if ( true === supportsFixedBackground() ) {
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document.documentElement.className += ' background-fixed';
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}
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});
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// If navigation menu is present on page, adjust it on scroll and screen resize.
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if ( $navigation.length ) {
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// On scroll, we want to stick/unstick the navigation.
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$( window ).on( 'scroll', function() {
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adjustScrollClass();
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adjustHeaderHeight();
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});
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// Also want to make sure the navigation is where it should be on resize.
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$( window ).resize( function() {
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setNavProps();
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setTimeout( adjustScrollClass, 500 );
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});
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}
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$( window ).resize( function() {
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clearTimeout( resizeTimer );
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resizeTimer = setTimeout( function() {
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belowEntryMetaClass( 'blockquote.alignleft, blockquote.alignright' );
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}, 300 );
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setTimeout( adjustHeaderHeight, 1000 );
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});
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// Add header video class after the video is loaded.
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$( document ).on( 'wp-custom-header-video-loaded', function() {
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$body.addClass( 'has-header-video' );
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});
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})( jQuery );
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