WordPress/wp-admin/about.php

<?php
/**
 * About This Version administration panel.
 *
 * @package WordPress
 * @subpackage Administration
 */

/** WordPress Administration Bootstrap */
require_once( dirname( __FILE__ ) . '/admin.php' );

wp_enqueue_script( 'underscore' );

$title = __( 'About' );

list( $display_version ) = explode( '-', get_bloginfo( 'version' ) );

include( ABSPATH . 'wp-admin/admin-header.php' );
?>
	<div class="wrap about-wrap full-width-layout">
		<h1><?php printf( __( 'Welcome to WordPress&nbsp;%s' ), $display_version ); ?></h1>

		<p class="about-text"><?php printf( __( 'Thank you for updating to the latest version! WordPress %s will smooth your design workflow and keep you safe from coding errors.' ), $display_version ); ?></p>
		<div class="wp-badge"><?php printf( __( 'Version %s' ), $display_version ); ?></div>

		<h2 class="nav-tab-wrapper wp-clearfix">
			<a href="about.php" class="nav-tab nav-tab-active"><?php _e( 'What&#8217;s New' ); ?></a>
			<a href="credits.php" class="nav-tab"><?php _e( 'Credits' ); ?></a>
			<a href="freedoms.php" class="nav-tab"><?php _e( 'Freedoms' ); ?></a>
			<a href="freedoms.php?privacy-notice" class="nav-tab"><?php _e( 'Privacy' ); ?></a>
		</h2>

		<div class="feature-section one-col">
			<div class="col">
				<h2>
					<?php
						printf(
							/* translators: %s: party popper emoji */
							__( 'Major Customizer Improvements, Code Error Checking, and More! %s' ),
							'&#x1F389'
						);
					?>
				</h2>
				<p><?php _e( 'Welcome to an improved Customizer workflow with design drafts, locking, scheduling, and preview links. What&#8217;s more, code syntax highlighting and error checking will make for a clean and smooth site building experience. Finally, if all that wasn&#8217;t pretty great, we&#8217;ve got a great new Gallery widget and improvements to theme browsing and switching.' ); ?></p>
			</div>
		</div>

		<div class="inline-svg full-width">
			<picture>
				<source media="(max-width: 500px)" srcset="<?php echo 'https://s.w.org/images/core/4.9/banner-mobile.svg'; ?>">
				<img src="https://s.w.org/images/core/4.9/banner.svg" alt="">
			</picture>
		</div>

		<div class="floating-header-section">
			<div class="section-header">
				<h2><?php _e( 'Customizer Workflow Improved' ); ?></h2>
			</div>

			<div class="section-content">
				<div class="section-item">
					<div class="inline-svg">
						<img src="https://s.w.org/images/core/4.9/draft-and-schedule.svg" alt="">
					</div>
					<h3><?php _e( 'Draft and Schedule Site Design Customizations' ); ?></h3>
					<p><?php _e( 'Yes, you read that right. Just like you can draft and revise posts and schedule them to go live on the date and time you choose, you can now tinker with your site&#8217;s design and schedule those design changes to go live as you please.' ); ?></p>
				</div>
				<div class="section-item">
					<div class="inline-svg">
						<img src="https://s.w.org/images/core/4.9/design-preview-links.svg" alt="">
					</div>
					<h3><?php _e( 'Collaborate with Design Preview Links' ); ?></h3>
					<p><?php _e( 'Need to get some feedback on proposed site design changes? WordPress 4.9 gives you a preview link you can send to your team and customers so that you can collect and integrate feedback before you schedule the changes to go live. Can we say collaboration&#43;&#43;?' ); ?></p>
				</div>
				<div class="section-item">
					<div class="inline-svg">
						<img src="https://s.w.org/images/core/4.9/locking.svg" alt="">
					</div>
					<h3><?php _e( 'Design Locking To Guard Your Changes' ); ?></h3>
					<p><?php _e( 'Ever encounter a scenario where two designers walk into a project and designer A overrides designer B&#8217;s beautiful changes? WordPress 4.9&#8217;s design lock feature (similar to post locking) secures your draft design so that no one can make changes to it or erase all your hard work.' ); ?></p>
				</div>
				<div class="section-item">
					<div class="inline-svg">
						<img src="https://s.w.org/images/core/4.9/prompt.svg" alt="">
					</div>
					<h3><?php _e( 'A Prompt to Protect Your Work' ); ?></h3>
					<p><?php _e( 'Were you lured away from your desk before you saved your new draft design? Fear not, when you return, WordPress 4.9 will politely ask whether or not you&#8217;d like to save your unsaved changes.' ); ?></p>
				</div>
			</div>
		</div>

		<div class="floating-header-section">
			<div class="section-header">
				<h2><?php _e( 'Coding Enhancements' ); ?></h2>
			</div>

			<div class="section-content">
				<div class="section-item">
					<div class="inline-svg">
						<img src="https://s.w.org/images/core/4.9/syntax-highlighting.svg" alt="">
					</div>
					<h3><?php _e( 'Syntax Highlighting and Error Checking? Yes, Please!' ); ?></h3>
					<p><?php _e( 'You&#8217;ve got a display problem but can&#8217;t quite figure out exactly what went wrong in the CSS you lovingly wrote. With syntax highlighting and error checking for CSS editing and the Custom HTML widget introduced in WordPress 4.8.1, you&#8217;ll pinpoint coding errors quickly. Practically guaranteed to help you scan code more easily and suss out and fix code errors quickly.' ); ?></p>
				</div>
				<div class="section-item">
					<div class="inline-svg">
						<img src="https://s.w.org/images/core/4.9/sandbox.svg" alt="">
					</div>
					<h3><?php _e( 'Sandbox for Safety' ); ?></h3>
					<p><?php _e( 'The dreaded white screen. You&#8217;ll avoid it when working on themes and plugin code because WordPress 4.9 will warn you about saving an error. You&#8217;ll sleep better at night.' ); ?></p>
				</div>
				<div class="section-item">
					<div class="inline-svg">
						<img src="https://s.w.org/images/core/4.9/warning.svg" alt="">
					</div>
					<h3><?php _e( 'Warning: Potential Danger Ahead!' ); ?></h3>
					<p><?php _e( 'When you edit themes and plugins directly, WordPress 4.9 will politely warn you that this is a dangerous practice. It will recommend that you backup your files before saving, so they don&#8217;t get overwritten by the next update. Take the safe route: your future self will thank you. Your team and customers will thank you.' ); ?></p>
				</div>
			</div>
		</div>

		<div class="floating-header-section">
			<div class="section-header">
				<h2><?php _e( 'Even More Widget Updates' ); ?></h2>
			</div>

			<div class="section-content">
				<div class="section-item">
					<div class="inline-svg">
						<img src="https://s.w.org/images/core/4.9/gallery-widget.svg" alt="">
					</div>
					<h3><?php _e( 'The New Gallery Widget' ); ?></h3>
					<p><?php _e( 'An incremental improvement to the media changes hatched in WordPress 4.8, you can now add a gallery via widget. Yes!' ); ?></p>
				</div>
				<div class="section-item">
					<div class="inline-svg">
						<img src="https://s.w.org/images/core/4.9/media-button.svg" alt="">
					</div>
					<h3><?php _e( 'Press a Button, Add Media' ); ?></h3>
					<p><?php _e( 'Want to add media to your text widget? Embed images, video, and audio directly into the widget along with your text, with our simple but useful Add Media button. Woo!' ); ?></p>
				</div>
			</div>
		</div>

		<div class="floating-header-section">
			<div class="section-header">
				<h2><?php _e( 'Site Building Improvements' ); ?></h2>
			</div>

			<div class="section-content">
				<div class="section-item">
					<div class="inline-svg">
						<img src="https://s.w.org/images/core/4.9/theme-switching.svg" alt="">
					</div>
					<h3><?php _e( 'More Reliable Theme Switching' ); ?></h3>
					<p><?php _e( 'When you switch themes, widgets sometimes think they can just up and move location. Improvements in WordPress 4.9 offer more persistent menu and widget placement when you decide it&#8217;s time for a new theme. Additionally, you can preview installed themes or download, install, and preview new themes right. Nothing says handy like being able to preview before you deploy. ' ); ?></p>
				</div>
				<div class="section-item">
					<div class="inline-svg">
						<img src="https://s.w.org/images/core/4.9/menu-flow.svg" alt="">
					</div>
					<h3><?php _e( 'Better Menu Instructions = Less Confusion' ); ?></h3>
					<p><?php _e( 'Were you confused by the steps to create a new menu? Perhaps no longer! We&#8217;ve ironed out the UX for a smoother menu creation process. Newly updated copy will guide you.' ); ?></p>
				</div>
			</div>
		</div>

		<div class="inline-svg">
			<picture>
				<source media="(max-width: 500px)" srcset="<?php echo 'https://s.w.org/images/core/4.9/gutenberg-mobile.svg'; ?>">
				<img src="https://s.w.org/images/core/4.9/gutenberg.svg" alt="">
			</picture>
		</div>

		<div class="feature-section">
			<h2>
				<?php
					printf(
						/* translators: %s: handshake emoji */
						__( 'Lend a Hand with Gutenberg %s' ),
						'&#x1F91D'
					);
				?>
			</h2>
			<p>
			<?php
			printf(
				__( 'WordPress is working on a new way to create and control your content and we&#8217;d love to have your help. Interested in being an <a href="%1$s">early tester</a> or getting involved with the Gutenberg project? <a href="%2$s">Contribute on GitHub</a>.' ),
				__( 'https://wordpress.org/plugins/gutenberg/' ),
				'https://github.com/WordPress/gutenberg'
			);
				?>
				</p>
		</div>

		<hr />

		<div class="changelog">
			<h2>
			<?php
				printf(
					/* translators: %s: smiling face with smiling eyes emoji */
					__( 'Developer Happiness %s' ),
					'&#x1F60A'
				);
			?>
			</h2>

			<div class="under-the-hood two-col">
				<div class="col">
					<h3><a href="https://make.wordpress.org/core/2017/11/01/improvements-to-the-customize-js-api-in-4-9/"><?php _e( 'Customizer JS API Improvements' ); ?></a></h3>
					<p>
					<?php
						printf(
							/* translators: %s: https://make.wordpress.org/core/2017/11/01/improvements-to-the-customize-js-api-in-4-9/  */
							__( 'We&#8217;ve made numerous improvements to the Customizer JS API in WordPress 4.9, eliminating many pain points and making it just as easy to work with as the PHP API. There are also new base control templates, a date/time control, and section/panel/global notifications to name a few. <a href="%s">Check out the full list.</a>' ),
							'https://make.wordpress.org/core/2017/11/01/improvements-to-the-customize-js-api-in-4-9/'
						);
					?>
					</p>
				</div>
				<div class="col">
					<h3><a href="https://make.wordpress.org/core/2017/10/22/code-editing-improvements-in-wordpress-4-9/"><?php _e( 'CodeMirror available for use in your themes and plugins' ); ?></a></h3>
					<p><?php _e( 'We&#8217;ve introduced a new code editing library, CodeMirror, for use within core. Use it to improve any code writing or editing experiences within your plugins, like CSS or JavaScript include fields.' ); ?></p>
				</div>
				<div class="col">
					<h3><a href="https://make.wordpress.org/core/2017/10/30/mediaelement-upgrades-in-wordpress-4-9/"><?php _e( 'MediaElement.js upgraded to 4.2.6' ); ?></a></h3>
					<p><?php _e( 'WordPress 4.9 includes an upgraded version of MediaElement.js, which removes dependencies on jQuery, improves accessibility, modernizes the UI, and fixes many bugs.' ); ?></p>
				</div>
				<div class="col">
					<h3><a href="https://make.wordpress.org/core/2017/10/15/improvements-for-roles-and-capabilities-in-4-9/"><?php _e( 'Improvements to Roles and Capabilities' ); ?></a></h3>
					<p><?php _e( 'New capabilities have been introduced that allow granular management of plugins and translation files. In addition, the site switching process in multisite has been fine-tuned to update the available roles and capabilities in a more reliable and coherent way.' ); ?></p>
				</div>
			</div>
		</div>

		<hr />

		<div class="return-to-dashboard">
			<?php if ( current_user_can( 'update_core' ) && isset( $_GET['updated'] ) ) : ?>
				<a href="<?php echo esc_url( self_admin_url( 'update-core.php' ) ); ?>">
					<?php is_multisite() ? _e( 'Return to Updates' ) : _e( 'Return to Dashboard &rarr; Updates' ); ?>
				</a> |
			<?php endif; ?>
			<a href="<?php echo esc_url( self_admin_url() ); ?>"><?php is_blog_admin() ? _e( 'Go to Dashboard &rarr; Home' ) : _e( 'Go to Dashboard' ); ?></a>
		</div>
	</div>

	<script>
		(function( $ ) {
			$( function() {
				var $window = $( window );
				var $adminbar = $( '#wpadminbar' );
				var $sections = $( '.floating-header-section' );
				var offset = 0;

				// Account for Admin bar.
				if ( $adminbar.length ) {
					offset += $adminbar.height();
				}

				function setup() {
					$sections.each( function( i, section ) {
						var $section = $( section );
						// If the title is long, switch the layout
						var $title = $section.find( 'h2' );
						if ( $title.innerWidth() > 300 ) {
							$section.addClass( 'has-long-title' );
						}
					} );
				}

				var adjustScrollPosition = _.throttle( function adjustScrollPosition() {
					$sections.each( function( i, section ) {
						var $section = $( section );
						var $header = $section.find( 'h2' );
						var width = $header.innerWidth();
						var height = $header.innerHeight();

						if ( $section.hasClass( 'has-long-title' ) ) {
							return;
						}

						var sectionStart = $section.offset().top - offset;
						var sectionEnd = sectionStart + $section.innerHeight();
						var scrollPos = $window.scrollTop();

						// If we're scrolled into a section, stick the header
						if ( scrollPos >= sectionStart && scrollPos < sectionEnd - height ) {
							$header.css( {
								position: 'fixed',
								top: offset + 'px',
								bottom: 'auto',
								width: width + 'px'
							} );
						// If we're at the end of the section, stick the header to the bottom
						} else if ( scrollPos >= sectionEnd - height && scrollPos < sectionEnd ) {
							$header.css( {
								position: 'absolute',
								top: 'auto',
								bottom: 0,
								width: width + 'px'
							} );
						// Unstick the header
						} else {
							$header.css( {
								position: 'static',
								top: 'auto',
								bottom: 'auto',
								width: 'auto'
							} );
						}
					} );
				}, 100 );

				function enableFixedHeaders() {
					if ( $window.width() > 782 ) {
						setup();
						adjustScrollPosition();
						$window.on( 'scroll', adjustScrollPosition );
					} else {
						$window.off( 'scroll', adjustScrollPosition );
						$sections.find( '.section-header' )
							.css( {
								width: 'auto'
							} );
						$sections.find( 'h2' )
							.css( {
								position: 'static',
								top: 'auto',
								bottom: 'auto',
								width: 'auto'
							} );
					}
				}
				$( window ).resize( enableFixedHeaders );
				enableFixedHeaders();
			} );
		})( jQuery );
	</script>

<?php

include( ABSPATH . 'wp-admin/admin-footer.php' );

// These are strings we may use to describe maintenance/security releases, where we aim for no new strings.
return;

__( 'Maintenance Release' );
__( 'Maintenance Releases' );

__( 'Security Release' );
__( 'Security Releases' );

__( 'Maintenance and Security Release' );
__( 'Maintenance and Security Releases' );

/* translators: %s: WordPress version number */
__( '<strong>Version %s</strong> addressed one security issue.' );
/* translators: %s: WordPress version number */
__( '<strong>Version %s</strong> addressed some security issues.' );

/* translators: 1: WordPress version number, 2: plural number of bugs. */
_n_noop(
	'<strong>Version %1$s</strong> addressed %2$s bug.',
	'<strong>Version %1$s</strong> addressed %2$s bugs.'
);

/* translators: 1: WordPress version number, 2: plural number of bugs. Singular security issue. */
_n_noop(
	'<strong>Version %1$s</strong> addressed a security issue and fixed %2$s bug.',
	'<strong>Version %1$s</strong> addressed a security issue and fixed %2$s bugs.'
);

/* translators: 1: WordPress version number, 2: plural number of bugs. More than one security issue. */
_n_noop(
	'<strong>Version %1$s</strong> addressed some security issues and fixed %2$s bug.',
	'<strong>Version %1$s</strong> addressed some security issues and fixed %2$s bugs.'
);

/* translators: %s: Codex URL */
__( 'For more information, see <a href="%s">the release notes</a>.' );