# Changelog

## In-progress version 2.1.83

* ENHANCEMENT: Better suggestions for mirrors when Library server does not provide mirror info
* UPDATE: Streamline polling of spinner and messaging
* FIX: Selection of languages in Library
* FIX: Display of some irregularly formatted filenames in Library
* FIX: Ensure spinner never shows for more than 3 seconds
* FIX: Display of landing pages of YouTube-based archives (e.g. TED Talks)
* FIX: Ensure dynamic element is scrolled into view when clicked in collection archives
* FIX: Regression preventing load of some relative assets in Zimit archives

## Release 2.1.8

* FEATURE: Enable playback of most offline **embedded** YouTube video in Zimit ZIMs (SW mode)
* ENHANCEMENT: YouTube video **links** can be played offline if video available (JQuery and SW modes)
* ENHANCEMENT: Clearer signposting of Archive Index vs URL Index
* ENHANCEMENT: Show an alert to user if main page is not an article
* UPDATE: Sample archive updated to `wikipedia_en_climate_change_mini_2022-09`
* WORKAROUND: Assets with erroneous MIME types were misrecognized as articles (blocking reload of some articles)
* FIX: Downloading of non-mirrored content in the Library
* FIX: Recognize XHTML documents and applications in Zimit ZIMs and treat as HTML
* FIX: Wikivoyage package and install icons
* FIX: Bug preventing loading of Nautilus-based ZIM assets
* FIX: Detect more ZIMs for active content warning
* FIX: Provide instructions for showing URL Index in active content warning
* FIX: Download of files with very long filenames
* FIX: Bug causing incomplete loading of images on image-heavy landing pages
* FIX: Display of blue placeholders for manual image extraction in SW mode

## Release 2.1.4

* ENHANCEMENT: Basic Zimit file reading in IE11
* UPDATE: Sample archive updated to `wikipedia_en_climate_change_mini_2022-08`
* UPDATE: Provide more complete documentation on GitHub
* FIX: Correct location of relative links on Zimit landing pages
* FIX: Add more asset types to Type 1 C-namespace Zimit support

## Release 2.1.0

* UPDATE: Sample archive updated to `wikipedia_en_climate_change_mini_2022-07`
* UPDATE: Packages are now signed with new Kiwix coding certificate
* UPDATE: BitTorrent files are now displayed before magnet links in the download library
* FIX: Support reading of Zimit archives using new Type 1 C-namespace ZIM format
* FIX: Searching for namespaces with Type 1 Zimit ZIMs
* FIX: Hyperlink transformations for Type 1 Zimit ZIMs
* FIX: Package and install icons for WikiMed and Wikivoyage
* FIX: Bug which caused app to hang when encountering URLs larger than 2KB in length

## Release 2.0.9

* ENHANCEMENT: System back button in UWP app no longer exits the app
* ENHANCEMENT: Hyperlink the currently loaded archive so that user can re-open it easily with a click
* ENHANCEMENT: Make archive links combo box scrollable
* ENHANCEMENT: Make buttons more visible in dark mode
* FIX: Do not redirect to landing page if requested article is not found
* FIX: Prevent app entering an anomalous state if launch of Service Worker mode fails
* FIX: File handling API (works with latest Chrome, and with Edge Beta)
* FIX: Distinguish between Electron and NWJS when reporting app type to UI
* FIX: Dark style for new Stackexchange ZIMs

## Release 2.0.8

* FEATURE: Optionally check for app updates and inform user of availability
* ENHANCEMENT: Radical improvement in CSS rendering in Zimit ZIMs
* ENHANCEMENT: Option to warn before opening external links
* ENHANCEMENT: Provide magnet torrent links in Archive Library
* ENHANCEMENT: Provide link to preview of live ZIM archive on library.kiwix.org
* ENHANCEMENT: Reduce delay between image loads when lazy-loading images (Wikimedia ZIMs)
* ENHANCEMENT: Speed up regex processing of Zimit transforms
* ENHANCEMENT: Intelligently auto-switch image manipulation setting if supported by ZIM type
* ENHANCEMENT: Intelligently turn off dark theme if ZIM does not support it
* ENHANCEMENT: Improve MathML detection
* UPDATE: KaTeX library updated to 0.16
* FIX: Skipping forwards and backwards in videos inside Chromium frameworks
* FIX: Derive redirect information from Zimit Headers if the response is mising from the archive
* FIX: Searching for assets in url index now properly shows the url instead of title
* FIX: System alert dialogue box now handles keyboard events
* FIX: Add some failsafe code to hide spinner if it runs too long (does not handle app crashes)
* FIX: More robust insertion of Contet Security Policy into article
* FIX: Failure to interpret MathML in some circumstances
* FIX: Process correctly the `srcset` property in image sets for Zimit ZIMs
* FIX: Disable lazy image loading in Zimit ZIMs
* FIX: Add some failsafe code to hide spinner if it runs too long (does not handle app crashes)
* FIX: Dark theme for new Stackexchange ZIMs
* FIX: Interoperability between JQuery and Service Worker modes with Zimit archives
* FIX: Max page width manipulation in IE11

## Release 2.0.0

* FEATURE: Search for any asset in any ZIM by prefixing namespace
* ENHANCEMENT: Filter out undesired files more effectively (Zimit ZIMs)
* ENHANCEMENT: Process URLs in JavaScript files (Zimit ZIMs)
* ENHANCEMENT: Ensure user clears the cache when switching to SW mode while a Zimit ZIM is loaded
* ENHANCEMENT: Prevent expensive RegExp processing for irrelevant ZIM types
* ENHANCEMENT: Driect download certain recognized content types for Zimit archives
* ENHANCEMENT: Made PWA manifest compatible with Chromium installability criteria
* UPDATE: Refresh Kiwix icons
* UPDATE: Remove landing page override for mdwiki at request of maintainer
* UPDATE: Hyperlinking of images to high-res versions is now off by default
* FIX: Bug that caused repeating images when hyperlinking images to online high-res versions
* FIX: Erroneous link handling for Zimit files
* FIX: Add any missing file extension to downloadable files and construct MIME types if missing
* FIX: Exception when reloading the last selected archive on certain platforms
* FIX: Remove lazy image loading system if detected
* FIX: Errors with parsing and display of archive links in download library
* FIX: Adjustment to max page width restrictions is now applied on resize
* FIX: Remove more analytics spy scripts from Zimit ZIMs
* FIX: Incorrect meta tag encoding for some Zimit archives

## Release 1.9.9

* UPDATE: Sample archive updated to `wikipedia_en_climate_change_mini_2022-04`
* FEATURE: Experimental support for reading Zimit ZIM archives
* FIX: Support for reading background and bullet images in Zimit CSS in Service Worker mode
* FIX: Style of thumbinner Wikipedia images adjusted so that images are back in their original position
* FIX: MDwiki thumbinner images now have an MDwiki-specific override to prevent text bleeding to left of image
* FIX: Links to PDF data are now recognized by MIME type and downloaded as if they were files
* FIX: Support image links that have querystrings in Zimit archives
* FIX: Support percent-encoded ZIM URLs in Zimit archives
* FIX: Transition away from testing file extensions for caching strategy
* REGRESSION: Fix display of book thumbnails in Gutenberg ZIMs
* BUILD: Nightly builds of main app are now uploaded to a new server (with sftp instead of ssh)
* BUILD: Deploy PWA image on a k8s cluster
* BUILD: PWA images are now uploaded to ghcr.io instead of Docker Hub

## Release 1.9.6

* UPDATE: Sample archive updated to `wikipedia_en_climate_change_mini_2022-03`
* FEATURE: Option to hyperlink images in Wikimedia ZIMs to the online File for the image
* ENHANCEMENT: Electron app now uses File System Access API except for initial loading of packaged archive
* DEV: Provided instructions on how to split a ZIM archive using WSL
* DEV: The NWJS app is now built via CI (including nightly)
* FIX: App now (optionally) remembers the last viewed article for split ZIM archives
* FIX: Electron and UWP apps now auto-load split ZIM archives
* FIX: Failure to recognize landing page when retrieved from history or cache

## Release 1.9.3

* UPDATE: New sample archive: `wikipedia_en_climate_change_mini_2022-02`
* FEATURE: Electron apps now auto-update (Windows exe and Linux AppImage versions only)
* ENHANCEMENT: App now recognizes `mdwiki` ZIMs as WikiMed variants, and shows custom landing page
* REGRESSION: The NWJS has reverted to using JQuery mode by default while investigating an app crash with some articles in SW mode
* DEV: Automatic building of Electron app now enabled via GitHub Actions
* FIX: Improvement to independent browsing of windows in UWP app in SW mode
* FIX: Patch some CSS errors in `mdwiki` ZIMs
* FIX: Stabilize page loading when assets are missing (in SW mode)
* FIX: Styling of image-based landing pages

## Release 1.9.0

* ENHANCEMENT: Service Worker mode is now the default in contexts or frameworks that natively support it with good performance
* ENHANCEMENT: Option to reset app to defaults in Expert settings
* ENHANCEMENT: Better feedback to user during slow ZIM archive loading
* ENHANCEMENT: Included favicons at various resolutions
* ENHANCEMENT: App now uses Bootstrap asynchronous dialogue boxes for modal alert and confirm
* DEV: Developer option to bypass appCache
* DEV: Window location information now shown in API panel
* FIX: Bug that would sometimes cause a blank screen in Service Worker mode on slow devices
* FIX: Set headers properly when caching Fetch responses in JQuery mode
* FIX: Loading of articles that have question marks or hashes in the title
* FIX: Incorrect attempt to register Service Worker in XP version of NWJS app causing fatal crash on startup
* FIX: Random button now warns user if archive is not loaded
* FIX: Race condition loading deocmpressors which caused failure in some rare contexts with the file:// protocol
* FIX: Bug preventing proper loading of landing page in Khan Academy and TED Talks ZIMs

## Release 1.8.6

* UPDATE: Sample archive updated to `wikipedia_en_100_nopic_2021-12`
* ENHANCEMENT: Assets cache and app cache are now separated, so assets persist after update
* ENHANCEMENT: New persistent caching of ZIM assets that are not provided in file system singinficantly improves performance
* ENHANCEMENT: Automatically choose best available caching technology: Cache API, IndexedDB, Local Storage or memory
* ENHANCEMENT: New Cache API info panel in Configuration, and option to stop using and empty the cache
* FIX: Regression whereby blue image placeholders were not shown in jQuery mode when user turns off image display
* FIX: Bug whereby upgrade alert was triggered by caches from other apps on the same domain

## Release 1.8.5

* FIX: Stylesheet errors with sistersite boxes
* FIX: Regression with Electron file handling causing previously picked archive to be forgotten
* FIX: Fatal Electron error on startup if packaged archive cannot be found
* FIX: NWJS file handling with legacy file picker (for XP and Vista builds)

## Release 1.8.2

* UPDATE: Sample archive updated to `wikipedia_en_100_nopic_2021-11`
* UPDATE: App can now use the latest Electron release and APIs
* ENHANCEMENT: Electron version can now read contents of a picked archive directory
* ENHANCEMENT: Scrollbars are now styled (with darker colours) in dark mode (in Chromium frameworks)
* ENHANCEMENT: More app files are precached in the PWA for better offline experience
* ENHANCEMENT: Hardware back and forward buttons on mouse now work with UWP app (natively supported in other contexts)
* FIX: Prevent most app crashes when switching to SW mode in UWP app
* FIX: More intelligent relocation of hatnote and noexcerpt blocks
* FIX: UI bug when using the UWP app with a secondary display (via Config option)
* META: Release of UWP/PWA and Electron/NWJS versions of the app are now unified

## Release 1.7.8

* UPDATE: Sample archive updated to `wikipedia_en_100_nopic_2021-10`
* EXPERIMENTAL: Added option to display hidden block elements, prinicipally for Wikimedia ZIMs
* ENHANCEMENT: With display hidden elements opetion, force display of zero-width images also
* ENHANCEMENT: Allow more time between clicks to register a double-right-click
* FIX REGRESSION: Prevent incorrect parsing of map markers when image manipulation is on in SW mode
* FIX REGRESSION: Closing all sections (by deselecting "Open all sections") now works again in jQuery mode
* BACKEND: Use a safer way of determining the ZIM name and type

## Release 1.7.6

* UPDATE: Sample archive updated to `wikipedia_en_100_nopic_2021-09`
* ENHANCEMENT: The app should now show dynamic content on landing pages in YouTube-based ZIMs (SW mode)
* ENHANCEMENT: Option for map pins to open OpenStreetMap instead of Windows Maps App (mostly for Wikivoyage)
* ENHANCEMENT: Select map type automatically: Maps App for Windows, OSM for Linux or other
* ENHANCEMENT: Use smaller pins for Wikipedia pages vs Wikivoyage pages
* DEPRECATED: Disabled *indpenedent* resizing of content in iframe with touch: too slow, and worked only in Chromium
* FIX: Video playback controls are now shown in Khan Acadeny ZIMs (and others based on YouTube)
* FIX: Bug relocating hatnotes which moved extraneous text blocks
* FIX: Image rendering bug with substitute landing pages
* FIX: Fatal error loading the PWA in some circumstances
* FIX: Data URIs with WebP images can now be rendered in old browsers
* FIX: Style issues and rendering of map pins in German Wikimedia ZIMs
* FIX: Error with offline Cache that prevented PWA from working fully offline
* FIX: Prevented the NWJS app for Windows XP from attempting to switch to SW mode (which doesn't work)

## Release 1.7.3

* ENNHNCEMENT: Added more diagnostic APIs to the API panel in Configuration
* ENHANCEMENT: Added refresh button for picked folder in Configuration (UWP or File System Access API)
* ENHANCEMENT: Added some extra directories of useful ZIM archives to Donwload library
* ENHANCEMENT: Provide option to allow image manipulation (saving to disk or opening in new tab)
* ENHANCEMENT: Provide contextual warnings for features that do not work well with dynamic content
* ENHANCEMENT: Added help section in About concerning link handling, dynamic content, new windows, etc.
* ENHANCEMENT: Verbose tooltips provided for several options in Configuration
* ENHANCEMENT: Usage instructions more clearly highlighted on first run
* UPDATE: Sample ZIM changed to `wikipedia_en_100_nopic_2021-08.zim` in order to reduce app size
* UPDATE: New option to change right click to double right click for opening new window or tab
* FIX: Issue preventing correct parsing of ZIM archive path in some contexts in SW mode
* FIX: Some app crashes when switching the UWP app to SW mode
* FIX: Printing in SW mode (load all images correctly before printing)
* FIX: Restoring DOM after printing in SW mode
* FIX: Issues with toolbars getting stuck on after searching for text in article
* FIX: Better replication of infobox mobile and desktop styles
* FIX: Typo in code causing some pages to load assets incorrectly in jQuery mode
* FIX: Updated style locations for custom WikiMed landing page (fixes display issue)

## Release 1.6.0

* FEATURE: New dropdown in Download Library allows filtering the list of archives by subject (for some ZIM types)
* ENHANCEMENT: Sorting the Download Library list by clicking on the Size / Last modified / Name headers
* ENHANCEMENT: The app can now take advantage of native Promises (faster than Q)
* ENHANCEMENT: Decompressors now loaded as fast binary WASM modules if the brower supports WebAssembly
* UPDATE: Sample ZIM updated to `wikipedia_en_100_maxi_2021-07.zim`
* EXPERIMENTAL: Intalled PWA can now be opened offline when double-clicking ZIM archive (depends on File Handling API)
* FIX: More displaced hatnotes corrected
* FIX: Style injection code that would (rarely) cause an exception on some ZIM types

## Release 1.5.0

* FEATURE: Search with wildcards `.*`, `.+` or regex syntax `(?:my_regular_expression)`
* FEATURE: (Experimental) PWA is paritcipating in File Handling API origin trial
* ENHANCEMENT: Significant speed-up by using native Promise API, or modern polyfill where needed
* ENHANCEMENT: Added full usage/syntax notes for title search and Alphabetical Title Index
* ENHANCEMENT: Include `h4` headings in Table of Contents
* ENHANCEMENT: Report number of titles scanned for long title searches
* UPDATE: Sample ZIM updated to `wikipedia_en_100_maxi_2021-06.zim`
* FIX: Display of ZIM Archive Index
* FIX: Bug which failed to detect images correctly in a new tab
* FIX: Touch-zoom of contents of iframe no longer blanks part of the display
* FIX: Broken zoom of contents of iframe (with UI buttons) in Internet Explorer
* FIX: Bug setting up backlinks which caused some pages not to load
* FIX: Unhandled exception when cite ref was not found

## Release 1.4.2

* ENHANCEMENT: Improve zooming and re-flowing the article contents in browsers that support the `zoom` style property
* ENHANCEMENT: Add a Content Security Policy preventing contents of a page from connecting to online resources
* FIX: Crash in UWP app after updating a ZIM archive
* FIX: Improve handover from local code to PWA code to prevent rogue error message
* FIX: Improve page composition timing for non-MS browsers

## Release 1.4.1

* FIX: Critical bug where article is not unhidden in time on slow systems in jQuery mode
* FIX: Issues with dark mode in Gutenberg ZIMs using SW mode
* FIX: Missing images from book lists in Gutenberg ZIMs

## Release 1.4.0

* ENHANCEMENT: Pre-calculate position and size of article namespace in legacy ZIMs (speeds up binary search)
* ENHANCEMENT: New option to move navigation buttons to the top toolbar
* UPDATE: Sample ZIM updated to `wikipedia_en_100_maxi_2021-05.zim`
* UPDATE: System dark/light mode now used for "auto" setting in modern browsers (as well as UWP)
* UPDATE: KaTeX to v0.13.11
* FIX: Double-clicking on archive failed to launch it in UWP app running in SW mode
* FIX: Hover and active colours on buttons
* FIX: Hide jump in page position during article load in Service Worker mode
* FIX: Adjusted timing of hiding and showing the article during page composition
* FIX: Intermittent failure to compose page in UWP app on mobile
* FIX: Reposition multiple displaced hatnotes
* FIX: Click on document reloads article when open new window feature is off
* FIX: Bug which prevented auto launch of packaged file on first install
* FIX: Issue preventing the article window from receiving focus for keyboard input

## Release 1.3.2

* FEATURE: Open a new browsable tab or window with right-click, long-press, ctrl-click, middle-click
* UPDATE: Sample archive updated to `wikipedia_en_100_maxi_2021-04`
* UPDATE: Release Linux AppImage packages for Electron-based build
* ENHANCEMENT: Alt-left or Ctrl-left (and same for right key) can now be used for navigation
* FIX: Prevent flash between page loads by adapting empty screen to the selected theme color
* FIX: Crash on upgrade of ZIM archive in some contexts
* FIX: Subtitle dislplay on videos
* FIX: Download of media and subtitles
* FIX: Display of list-based home pages
* FIX: Failure to apply dark theme to articles with no CSS
* FIX: Bug affecting middle-click when opening a new window or tab
* FIX: Bug which hid the file selectors when the app could not get a handle on a file or directory
* FIX: Bug preventing touch navigation

## Release 1.2.5

* ENHANCEMENT: PWA now adapts if it was launched from a basic packaged app
* UPDATE: Location of cached styles tweaked to reflect latest location in ZIM archives
* UPDATE: Cached main pages for WikiMed and Wikivoyage updated and used by vanilla app
* FIX: Properly define width of infoboxes in Wikimedia Destop style

## Release 1.2.4

* UPDATE: Packaged archive updated to `wikipedia_en_100_maxi_2021-03`
* ENHANCEMENT: Support v1 article index in no-namespace ZIM archives
* ENHANECMENT: Detect and correct erroneous hard-coded sytling of navboxes in recent ZIMs
* FIX: Correct width of infoboxes in Wikipedia Desktop style
* FIX: Failure to recognize mouse click on title index entry
* FIX: Issue preventing proper relocation of infobox when transforming to desktop style

## Release 1.2.3

* UPDATE: Better messaging around 'failure' to load SW mode (not a real failure)
* FIX: Calculation of appRoot directory

## Release 1.2.2

* ENHANCEMENT: Use a list of customized start pages even if the app is generic
* FIX: Map markers not showing in Service Worker mode
* FIX: Implement internal app:// links for app-based assets
* FIX: Race condition in handover to PWA code
* FIX: Faulty permalinks

## Release 1.2.1

* UPDATE: Minor update to improve handover between local and PWA code
* ENHANCEMENT: If app is running as a PWA, its identity is changed to Kiwix JS PWA
* FIX: Display of masonry tiles in JQuery mode with latest ZIMs

## Release 1.2.0

* ENHANCEMENT: Enable Service Worker mode in UWP app
* ENHANCEMENT: New domain pwa.kiwix.org for the PWA/UWP app
* UPDATE: Preliminary support for ZIM archives with no namespace
* UPDATE: Revised Privacy Policy to reflect PWA usage

## Release 1.1.4

* UPDATE: Included ZIM updated to `wikipedia_en_100_maxi_2021-01.zim`
* UPDATE: More consistent install prompt display in Configuration (for PWA)
* ENHANCEMENT: Provide more robust upgrade process for PWAs, including notification banner
* FIX: Disable HTTP cache when pre-caching upgraded app files
* FIX: Switching to jQuery mode in the PWA app no longer prevents the app working offline
* FIX: Display of masonry-style landing pages in SW mode
* FIX: Inconsistent use of Settings Store during app initialization
* FIX: Delete accidentally created Indexed Databases with wrong filename on startup (where possible)
* FIX: Provide explicit Content Security Policy headers to reduce or eliminate CORS errors in SW mode
* FIX: Broken manual display of images in SW mode
* FIX: Broken "Open all headings" option in SW mode
* FIX: Printing in SW mode
* FIX: Bugs with reload of last visited article
* META: Create-DraftRelease PowerShell script supports automatic creation of GitHub releases for more versions of the app

## Release 1.1.3

* UPDATE: Included ZIM updated to `wikipedia_en_100_maxi_2020-12.zim`
* UPDATE: Support new location of mobile and desktop styles in Wikimedia ZIMs
* UPDATE: Upgrade Settings store to use localStorage over cookies where available
* ENHANCEMENT: Enable use of Native File System with NWJS
* FIX: Styling of index-based landing pages
* FIX: Bugs with file picking in Native FS

## Release 1.1.2

* UPDATE: Included ZIM updated to `wikipedia_en_100_maxi_2020-11.zim`
* UPDATE: WebP support (via polyfill) for older browsers including Windows Mobile
* ENHANCEMENT: Improved block cache and faster conversion of file slice to blob
* REGRESSION: Manual extraction of images reverted to one-by-one to prevent errors with WebP batch decoding
* FIX: Critical error on some new Wikipedia articles containing equations
* FIX: Prevent erroneous display of Active Content Warning with ZSTD archives
* FIX: Reduce some cross-origin errors

## Release 1.0.0

* UPDATE: Included ZIM updated to `wikipedia_en_100_maxi_2020-09.zim`
* UPDATE: App now supports newest archives encoded with ZSTD compression
* ENHANCEMENT: Decompression speed gains with ZSTD
* ENHANCEMENT: Allow use of keyboard to select archive from archive list
* ENHANCEMENT: Option to display articles with all sections open or closed
* FIX: Prevent archive list from jumping to wrong archive on click
* FIX: Critical error on load if packaged archive name has changed
* FIX: Download links are no longer erroneously cached by the Service Worker
* DEPRECATED: Scrolling information for new users

## Release 0.9.9.992 (beta)

* UPDATE: Included ZIM updated to `wikipedia_en_100_maxi_2020-08.zim`
* UPDATE: Some new Kiwix icons
* FIX: Prevent extraneous titles appearing in search
* FIX: Broken drag-and-drop
* FIX: Bug with construction of backlinks preventing load of some Wikipedia articles
* FIX: Calculate path of breakout icon correctly in SW mode
* ENHANCEMENT: Use Native File System API in PWA version
* ENHANCEMENT: Fix printing in the Electron app
* ENHANCEMENT: Support launching Electron app from shortcut
* ENHANCEMENT: Better error reporting in console log

## Release 0.9.9.991 (beta)

* FIX: Bug preventing all Kiwix apps accessing latest ZIMs (incorrect method of reading MIME type list)
* ENHANCEMENT: Included ZIM changed to wikipedia_en_100_maxi_2020-06.zim
* FIX: Several bugfixes to allow better running of Electron app in SW mode

## Release 0.9.9.99 (beta)

* ENHANCEMENT: Major upgrade to the title-search algorithm: search is now near-case-insensitive
* UPDATE: Included sample ZIM updated to wikipedia_en_ray_charles_maxi_2020-05.zim

## Release 0.9.9.98 (beta)

* ENHANCEMENT: Make app compatible with Electron / NWJS as a packaged app
* ENHANCEMENT: Better user experience for PWA version
* ENHANCEMENT: Attempt to make app a little more usable on Android browsers
* FIX: Incorrect layout when transforming WikiMed articles to desktop style
* FIX: Failure to load landing page when backing into it from history.back
* FIX: Incorrect hiding of toolbars after using in-page search
* UPDATE: Update Q Promise support to v1.5.1

## Release 0.9.9.97 (beta)

* ENHANCEMENT: Intuitive toolbar hiding/showing on scroll down/up
* ENHANCEMENT: Added block cache to speed up search considerably
* ENHANCEMENT: Provide option to set number of results to find when searching
* ENHANCEMENT: Provide app install experience for PWA
* FIX: Search results can now be scrolled by touch on Windows 10 tablets
* FIX: Corrected height of search results window so content is not hidden under footer
* FIX: Prevent ugly jumping of iframe on new article load
* FIX: Allow use of special characters in article search
* FIX: Remove broken links to deprecated portable versions of archives
* UPDATE: Added missing stylesheets for cache
* UPDATE: Added some more initial files to load for PWA

## Release 0.9.9.96 (beta)

* FIX: Broken display of Kiwix download library
* FIX: Broken display of MathML when there are no images in the document
* FIX: Search bar always remains on-screen if selected (in non-mobile contexts)
* FIX: All images above the fold are now loaded (async timing of image scanning was premature)
* FIX: Math typeset by KaTeX is rendered better when there are mbox statements (fbox is used instead)
* FIX: Display-style maths SVGs are now correctly inverted in dark mode
* FIX: Standard dark-mode SVGs in infoboxes and elsewhere are now displayed correctly without inversion
* FIX: Truncated display of search box
* UPDATE: Updated KaTeX library to v0.11.1
* ENHANCEMENT: Include more files in PWA payload to allow better offline functionality in PWA scenarios
* ENHANCEMENT: Appxbundle is now signed with Kiwix certificate for a better sideloading experience
* KNOWN ISSUE: In mobile contexts, top bar always gets hidden by Bootstrap on scroll

## Release 0.9.9.95 (beta)

* UPDATE: Improved support for stylesheets in latest Wikipedia ZIMs
* UPDATE: Updated the Privacy Policy
* ENHANCEMENT: The base app (not UWP) can now be installed as a PWA (visit <https://kiwix.github.io/kiwix-js-windows/www/index.html> to try)
* ENHANCEMENT: Assets are now cached in Service Worker mode
* ENHANCEMENT: Support MathML in latest Wikimedia ZIMs
* FIX: Fixed broken drag-and-drop
* FIX: Enable page extraction in Service Worker mode
* FIX: Rare condition where a missing ZIM causes the app to crash on load
* FIX: Fixed broken display of active content warning

## Release 0.9.9.94 (beta)

* ENHANCEMENT: Provide an alert if a packaged or picked file cannot be found
* ENHANCEMENT: App can now be compiled with Electron or NWJS to support Win XP/7/8.1 (see [releases](https://github.com/kiwix/kiwix-js-windows/releases))
* ENHANCEMENT: CORS errors are now detected and a message provided to the user to help resolve
* ENHANCEMENT: Fallback to localStorage if cookies are not supported (e.g. running Chromium from file:///)
* FIX: Bug with equations containing apostrophes
* FIX: ZIMs running in quirks mode are now patched to run in standards mode
* FIX: Better algorithm for adding missing notes backlinks
* FIX: Better process for hiding navbar (though Bootstrap still ignores on mobile)
* FIX: All blocks are now opened for details-summary tags
* FIX: Bugs with the timing of display blanking between page loads
* FIX: Missing target attribute for hyperlinks to some external files
* FIX: Race condition preventing jQuery `alert.hide()` statements from running
* FIX: Enable dark theme and style transformations in Service Worker mode
* FIX: Enable printing in Service Worker mode
* FIX: Critical page reload loop when switching styles in print dialogue
* FIX: Update printing filters to support deatils-summary ZIMs
* FIX: Rare condition where a missing ZIM causes the app to crash on load
* FIX: Article is now re-loaded on change of content injection mode
* FIX: Scripts no longer run in Quirks mode (for clients supporting Service Worker)
* UPDATE: August 2019 update of Ray Charles ZIM

## Release 0.9.9.91 (beta)

* FIX: Remembered last page is now properly blanked on new archive load
* FIX: The article content div is now hidden until the HTML for the requested article is injected
* FIX: Number of stylesheets retrieved from ZIM was not being counted properly, causing some pages to load twice
* FIX: New MediaWiki ZIMs with details-summary tags are now supported
* FIX: Low-level ZIM reader now conforms to libzim logic in deriving title from url
* FIX: Low-level ZIM reader now reads the MIME type list from the ZIM
* FIX: A system alert utility is now provided, to avoid using synchronous alert()
* FIX: Bug causing localStorage to fill up has been fixed
* FIX: A workaround has been added for improperly coded hyperlinks in subdirectories in WikiMedia ZIM files
* FIX: Various tweaks to cached and trasnformed styles
* FIX: Many more equations now rendered correctly due to change of engine
* FIX: Service Worker mode now works in browser context (not app context)
* FIX: MathTex now rendered in Service Worker mode
* UPDATE: Removed dependency on base tag, simplifying handling of hyperlinks
* ENHANCEMENT: Links in clickable image maps (e.g. in Wikivoyage) are now supported
* ENHANCEMENT: App code supports developer setting a custom start page for a packaged ZIM
* ENHANCEMENT: A ZIM archive can be loaded through drag-and-drop of the file into the app
* ENHANCEMENT: A ZIM archive can be loaded by double-clicking the file in Explorer
* ENHANCEMENT: Article search results can now be selected with physical keyboard (down, up, enter keys)
* ENHANCEMENT: Better lazy image loading, and enable lazy loading for Service Worker mode
* ENHANCEMENT: Subtle fade-in effect for lazy-loaded images
* ENHANCEMENT: Allow breakout link to work in Service Worker mode
* ENHANCEMENT: Change MathTex rendering engine from MathJax to KaTeX (much faster)

## Release 0.9.9.90 (beta)

* FIX: Remembered last page is now properly blanked on new archive load
* FIX: Number of stylesheets retrieved from ZIM was not being counted properly, causing some pages to load twice
* FIX: The article content div is now hidden until the HTML for the requested article is injected

## Release 0.9.9.89 (beta)

* FIX: Fixed regression preventing use of download library
* FIX: Fixed problems searching for dirEntries with empty titles in new ZIMs
* FIX: Correctly handle anchor links with a single #
* ENHANCEMENT: Improved styling of checkboxes in light and dark modes

## Release 0.9.9.88 (beta)

* ENHANCEMENT: Article can now be sent to device's browser for reading, side-by-side viewing, printing
* ENHANCEMENT: A breakout icon can optionally be shown on each page to enable sending page to browser (see Settings)
* ENHANCEMENT: A new "auto" setting for dark mode and dark theme follows the system default for UWP apps
* ENHANCEMENT: Checkbox and radio buttons are now styled and coloured for better visibility (also larger)
* ENHANCEMENT: Packaged apps now default to showing the most appropriate ZIM archive types from Library
* ENHANCEMENT: Streamlined the process for adding other languages of packaged app ZIM files
* ENHANCEMENT: Language and date selectors in Library are now responsive to each other
* ENHANCEMENT: Download link more clearly signalled
* UPDATE: Deal with re-organized stylesheets in mwoffliner ZIMs
* FIX: Fixed regression caused by removal of timeout for find in article function
* FIX: App detects a language that is predominantly ASCII and uses left-side word searching in that case (Chinese open-type search should be unaffected)
* FIX: Prevent crash if changing language selector on "wrong" screen
* FIX: Prevent timeout-related crashes on slower
* FIX: Prevent unusable app state after clicking non-Roman alphabet button in Archive Index

## Release 0.9.9.87 (beta)

* FIX: Removed timeout preventing fast typing for find in article function (Ctrl-F / Alt-F)
* FIX: Allow searching in article for languages that do not use spaces (such as Chinese)

## Release 0.9.9.85 (beta)

* ENHANCEMENT: Support for playing media (video/audio) in the ZIM if the device has the required codec
* ENHANCEMENT: Support for "downloading" media (e.g. videos+subtitles) from the ZIM
* ENHANCEMENT: Media are launched via appropriate app selection menu after download (mobile)
* ENHANCEMENT: Preliminary support for TED and dirtybiology ZIMs
* ENHANCEMENT: Preliminary support for Project Gutenberg ZIMs
* ENHANCEMENT: Support for "downloading" epub ebooks from Gutenberg ZIMs
* ENHANCEMENT: Epubs are launched in Edge's built-in epub reader, or via app selection menu
* ENHANCEMENT: Typing a space in search box now displays an Archive Index
* ENHANCEMENT: Option to support non-Roman alphabets for Archive Index
* ENHANCEMENT: If active content is detected in the ZIM, information is given about accessing the Index instead
* FIX: Add startup bootloop crash prevention
* FIX: Exceptions produced by unsupported JS in ZIM articles are now caught
* FIX: Prevent app crash with malformed anchor references
* FIX: Rogue ampersands in MathJax output are now correctly escaped
* FIX: Correct logic in binary search so it doesn't stall if assets in A namespace have no title
* FIX: Missing footnote reference numbers in desktop ZIMs transformed to mobile style
* FIX: Assets with unescaped characters in URL should now be retrieved correctly
* FIX: Individual extraction of images when images are disabled in Configuration

## Release 0.9.9.8 (beta)

* UPDATE: Ray Charles ZIM to October 2018 version
* ENHANCEMENT: Add a modern CSS spinner and rework status messages
* ENHANCEMENT: Neater presentation of article search results
* FIX: Crash when previously picked archive has been moved or deleted
* FIX: Support changed format of anchor references in latest English Wikipedia
* FIX: Correctly apply mobile styles when one of the defaults is missing
* FIX: Incorrect utf8 characters in mobile styles

## Release 0.9.9.7 (beta)

* ENHANCEMENT: Optimization of decompression process
* WORKAROUND: Prevent periodic hang in Service Worker mode
* FIX: Crash in RegExp engine caused by malformed backreferences in some articles

## Release 0.9.9.6 (beta)

* UPDATE: Mobile styles
* ENHANCEMENT: New compile of decoding engine provides significant performance improvement
* ENHANCEMENT: Better memory management to prevent app crashes
* ENHANCEMENT: Reduced dependency on jQuery for further performance gains
* ENHANCEMENT: Tweaks to dark theme
* ENHANCEMENT: Improvements to show-hide sections toggle function with footnote/endnote references
* FIX: Headers that open or close sections are no longer accidentally selected on tap or click
* FIX: Descriptive text for UI controls is now non-selectable for cleaner app experience
* FIX: Whitespace at the end of the page is now preserved when hiding reference section
* FIX: Tapping headers now only opens and closes sections on narrow screens as intended by WikiMedia

## Release 0.9.9.5 (beta)

* ENHANCEMENT: Headings in article can be toggled open or closed with tap or click
* ENHANCEMENT: Current page is cached in localStorage for very fast restart and reloading
* ENHANCEMENT: Automatically switch to desktop style for better printing result
* FIX: Bug which prevented switching the printing device (caused app crash)
* FIX: Bug in download links preventing display of language codes that are substrings of other language codes

## Release 0.9.9.4 (beta)

* ENHANCEMENT: Experimental support for printing articles
* ENHANCEMENT: Print zoom capability
* ENHANCEMENT: Prevent printing of location pins
* ENHANCEMENT: Set maximum page width to 100% before printing
* ENHANCEMENT: Better presentation of About and Changelog information
* WORKAROUND: MW-Offliner bug which places extraneous tags in some HTML id attributes

## Release 0.9.9.3 (beta)

* FIX: Article now reloads correctly when switching styles
* FIX: Unhandled exception after using in-article word search
* FIX: Browser history now remembered for first page load
* ENHANCEMENT: Filter ZIM archives by date in download links
* ENHANCEMENT: Option to remove maximum page width restriction for Wikipedia articles
* ENHANCEMENT: Setting or clearing dark themes no longer require page reload
* ENHANCEMENT: Wider range of infoboxes, and "homonymie" hatnotes supported
* ENHANCEMENT: Better algorithm for moving first paragraph when there are stacked infoboxes

## Release 0.9.9.2 (beta)

* FIX: Added more padding for content hidden under the bottom bar
* FIX: New mode of injecting HTML into iframe fixes baseUrl issues
* ENHANCEMENT: Some code redundancy removed
* ENHANCEMENT: Faster typesetting of TeX equations
* ENHANCEMENT: Experimental support for equations in mathoverflow and related stackechange ZIMs
* ENHANCEMENT: Dark theme support for stackexchange ZIMs
* ENHANCEMENT: Uncluttered the UI for file selection

## Release 0.9.9 (beta)

* FIX: Reduced memory usage for decompressing multiple SVG images/equations to prevent crash on devices with 1GB RAM
* FIX: Display bug causing Settings tab to remain selected after article load
* FIX: Corrected dark-style backgrounds in some infoboxes on WikiMed
* FIX: Loads landing page when an article is not found (instead of throwing a silent error)
* WORKAROUND for misplaced hatnotes in mobile-style ZIMs
* WORKAROUND for hidden IPA pronunciation information on some articles
* ENHANCEMENT: 'Unclicking' a tab (Settings or About) now returns the user to the article
* ENHANCEMENT: Activating dark theme for UI now activates article dark theme by default
* ENHANCEMENT: Improved handling and display of file selectors
* ENHANCEMENT: Clearer navigation signposting from About tab
* ENHANCEMENT: Dedicated icon for WikiMed archives

## Release 0.9.7 (beta)

* UPDATE: January 2018 update of Wikivoyage ZIM archive to wikivoyage_en_all_novid_2018-01.zim
* ENHANCEMENT: The Wikivoyage app now hides the file selectors by default in the Config menu to avoid confusion and to encourage use of Kiwix JS for anything not related to Wikivoyage
* FIX: Added icon indicating that a link is to an external web site
* ENHANCEMENT: Inject footnote backlinks if the ZIM doesn't have any
* ENHANCEMENT: Support ZIMs that have subdirectories (Stackexchange family ZIMs)
* FIX: Bugs in mobile to desktop style transformation
* FIX: Issue with infoboxes and images not stacking correctly on mobile displays
* FIX: Support new-style infoboxes in German Wikivoyage
* FIX: Last-visited page was not being remembered when user picked the file as a single archive
* FIX: Bug which prevented the dark mode by simple inversion from functioning
* FIX: Issue with toolbar icons being misaligned on small screens

## Release 0.9.6 (beta)

* FIX: Prevent bottom toolbar from wrapping across two lines on small screens
* ENHANCEMENT: Enabled autoloading of last-read page on app start (and privacy option to turn this off)
* ENHANCEMENT: Geo-location co-ordinates in English and German Wikivoyage are represented with a location marker that links to the Maps app (opens map to show the precise location)
* ENHANCEMENT: Telephone numbers marked with tel: links will attempt to open a relevant app for dialling (e.g., Skype or the People app) when selected
* FIX: Links in Stackexchange ZIMs are now recognized and can be used to open the content
* WORKAROUND: Some Wikivoyage entries have HTML showing in the header, and this is now (temporarily) suppressed (the HTML is interpreted) until the ZIMs are fixed
* ENHANCEMENT: The toolbar icon now switches to a Wikivoyage logo if a Wikivoyage ZIM is loaded

## Release 0.9.3 (beta)

* WORKAROUND: Mis-aligned toolbar icons on smaller screens
* FIX: Rogue HTML showing in some pages from recent ZIM archives
* ENHANCEMENT: Better experience when scanning local storage for archives

## Release 0.9.0 (beta)

* ENHANCEMENT: Auto-loading of ZIM archives on device storage
* ENHANCEMENT: In-page search / highlighting with Ctrl-F / Alt-F or tap on search button
* ENHANCEMENT: Uses UWP APIs for sotrage: Future Access List so that users do not need to pick their ZIM file every time
* ENHANCEMENT: Dark-themed User Interface
* ENHANCEMENT: Experimental Wikipedia Dark Theme
* ENHANCEMENT: Font scaling for articles and for the UI
* ENHANCEMENT: Cleaner, minimalistic UI (eliminated hamburger menu due to poor navigability)
* FIX: Display of SVG files is handled by careful queuing of images to send to the decompressor (fixes hang in articles with many equations)
* ENHANCEMENT: If the TeX string of an equation is available, it will be typeset using MathJax (huge speed improvement)
* ENHANCEMENT: Transform the layout of Wikipedia articles from desktop to mobile style and vice versa (experimental)
* ENHANCEMENT: Disable the display of images, and extract them one-by-one as needed (for slow devices)
* ENHANCEMENT: Only send images in current viewport to the decompressor, and prefetch configurable (by developer) number of images from above and below the viewport
