credit:"""Congratulations to Frank. B for his winning design for the banner for this release (here are the [[other entries|https://groups.google.com/g/tiddlywiki/c/eccIEHZoxsI/m/_MWs3EooBAAJ]]).
The major change in this release is that the format used to store tiddlers in TiddlyWiki's HTML file has changed from an HTML DIV-based format to a new JSON-based format. The consequences of this change are far-reaching. They are thus the primary rationale for bumping the version number from v5.1.x to v5.2.0:
Firstly, the ''characters that can be used in field names are now unrestricted'' (just like tiddler titles), making it possible to use fieldnames like `My^Field` or `☃️`. This has become possible because every other part of TiddlyWiki was already capable of dealing with unrestricted field names apart from saving as an HTML file.
Secondly, external tools that read, write or otherwise process TiddlyWiki HTML files will need modification to understand the new store area format. The details are documented in the [[/dev wiki|https://tiddlywiki.com/dev/#Data%20Storage%20in%20Single%20File%20TiddlyWiki]].
It is now possible to drag and drop an image file directly into the tiddler text editor. A popup allows the incoming image tiddler to be renamed, and then `[img[title]]` is automatically inserted into the tiddler text at the insertion point.
* <<.link-badge-added "https://github.com/TiddlyWiki/TiddlyWiki5/pull/5699">> (and again [[here|https://github.com/TiddlyWiki/TiddlyWiki5/pull/5705]]) ability to drag and drop images directly in the editor
It is now possible to embed actions within the body of the ActionCreateTiddlerWidget, and those actions can directly access the title of the newly created tidddler via the variable `createTiddler-title`, and the title of the corresponding draft in the variable `createTiddler-draftTitle`. The old `$savetitle` and `$savedrafttitle` attributes are now deprecated.
* <<.link-badge-extended "https://github.com/TiddlyWiki/TiddlyWiki5/commit/9faaa312998d48c56bd50335820b6b881266af4b">> [[ActionCreateTiddlerWidget]] to make the new title available as a variable
This simple-sounding change has several important consequences:
The first consequence is that it makes the TranscludeWidget much more efficient, and improves the performance of the refresh cycle.
The second consequence resolves a long-standing difficulty for many users: it is now possible to use an EditWidget to edit another field of the same tiddler. Previously, the edit widget would not work properly in such cases because it would be refreshed on every keypress, leading to the current editing caret/selection position being lost.
As sometimes happens, the third consequence is that constructions that relied on the old, buggy behaviour may no longer work as expected. A common example of such a construction is an invocation of a JavaScript macro. The problem stems from the fact that JavaScript macros are designed to be as simple as possible from the developers perspective, being pure functions that have no side effects, and that always return the same value for the same parameters. In particular, JavaScript macros cannot participate in TiddlyWiki's refresh mechansim, so they cannot force themselves to be updated when underlying data changes (for situations where such processing is needed, JavaScript widgets should be used instead of JavaScript macros).
However, developers have sometimes worked around this limitation by using the TranscludeWidget to force refreshing of a macro invocation when a particular tiddler changes. The newer, more selective behaviour means that sometimes such widgets will avoid a refresh that was previously relied upon to update the JavaScript macro.
For end users, if an upgrade to v5.2.0 causes problems then consult the discussion [[Forums]] to see if other users have encountered the same problem, and make a new posting if needed.
* <<.link-badge-improved "https://github.com/TiddlyWiki/TiddlyWiki5/pull/5736">> the TranscludeWidget to avoid triggering a refresh unless the transcluded field changes (previously it was also triggered for changes to other fields)
<<.link-badge-extended "https://github.com/TiddlyWiki/TiddlyWiki5/pull/5611">> (and [[here|https://github.com/TiddlyWiki/TiddlyWiki5/commit/4a99e0cc7d4a6b9e7071c0b2a9a0f63c3c7d2492]]) the [[ListWidget]] with an optional `counter` attribute specifying a variable to contain the numeric index of each list item. This is useful for creating a list of numbered items, and for detecting the first and last entries in a list
<<.link-badge-extended "https://github.com/TiddlyWiki/TiddlyWiki5/commit/3094e062366830bdecfb91e3d852667fa951dc50">> action widget execution with an optional new mode that ensures that all widgets are refreshed before invocation -- see [[ActionWidget Execution Modes]]. This resolves a long-standing inconsistency in the way that ActionWidgets are executed, making them behave much more like a conventional programming language
<<.link-badge-improved "https://github.com/TiddlyWiki/TiddlyWiki5/pull/5726">> the HTML comment syntax to enable it to be used before and in between pragmas such as macro definitions. This makes it much easier to provide documentation within complex wikitext tiddlers
<<.link-badge-fixed "https://github.com/TiddlyWiki/TiddlyWiki5/commit/a360adbba924d222c5b55709133c18890c04398d">> size of dropzone when story river is empty. For a long time, TiddlyWiki confusingly wouldn't recognise a drag and drop operation if the story river was empty
* <<.link-badge-improved "https://github.com/TiddlyWiki/TiddlyWiki5/pull/5380">> (and again [[here|https://github.com/TiddlyWiki/TiddlyWiki5/pull/5488]]) the efficiency of the linked list implementation used in filter processing
* <<.link-badge-improved "https://github.com/TiddlyWiki/TiddlyWiki5/pull/5362">> the [[all Operator]] and [[here|https://github.com/TiddlyWiki/TiddlyWiki5/pull/5369"]] the [[links Operator]], and [[here|https://github.com/TiddlyWiki/TiddlyWiki5/pull/6050]] the [[backlinks Operator]] to use the new linked list implementation
* <<.link-badge-improved "https://github.com/TiddlyWiki/TiddlyWiki5/pull/5436">> [[ETag|https://en.wikipedia.org/wiki/HTTP_ETag]]-based browser-side caching for all resources and GZip or Deflate compression for all responses to GET requests
* <<.link-badge-improved "https://github.com/TiddlyWiki/TiddlyWiki5/commit/70e60cd93fe26e9cde1e350e3236578fa5abfe48">> plugin internal formatting to remove unneeded whitespace, saving about 6% on the size of the $:/core plugin
* <<.link-badge-improved "https://github.com/TiddlyWiki/TiddlyWiki5/pull/6053">> performance of [[sort Operator]] through optimising common cases
* <<.link-badge-fixed "https://github.com/TiddlyWiki/TiddlyWiki5/pull/5479">> ability to import previously blocked system tiddlers
* <<.link-badge-improved "https://github.com/TiddlyWiki/TiddlyWiki5/pull/5812">> warning message when cancelling a pending import
* <<.link-badge-updated "https://github.com/TiddlyWiki/TiddlyWiki5/commit/f97850dd05693e84dd36b8af5d72b22fbfd74958">> the default font weights in the "Snow White" theme to be thicker and more legible
* <<.link-badge-fixed "https://github.com/TiddlyWiki/TiddlyWiki5/pull/5816">> modal mechanism to prevent page from scrolling while modals are displayed
* <<.link-badge-fixed "https://github.com/TiddlyWiki/TiddlyWiki5/pull/5326">> fill colour for "remove tag" button
* <<.link-badge-fixed "https://github.com/TiddlyWiki/TiddlyWiki5/pull/5370">> page title so that the separating em-dash is only used if the site subtitle is present
* <<.link-badge-fixed "https://github.com/TiddlyWiki/TiddlyWiki5/pull/5397">> broken aria-label in $:/PaletteManager
* <<.link-badge-added "https://github.com/TiddlyWiki/TiddlyWiki5/pull/5672">> link to the existing tiddler when the warning "Target tiddler already exists" is displayed in the edit template
* <<.link-badge-added "https://github.com/TiddlyWiki/TiddlyWiki5/pull/5727">> class to make tag pills in the edit template look like those in the ViewTemplate
* <<.link-badge-fixed "https://github.com/TiddlyWiki/TiddlyWiki5/pull/1661">> overflow of long field values that do not contain whitespace
* <<.link-badge-improved "https://github.com/TiddlyWiki/TiddlyWiki5/commit/a4421f50c6886b02c3595b7ffa6ba72674d6bf21">> GitHub, Gitea and GitLab savers to wikify the commit message, enabling macros to be used in the message
* <<.link-badge-improved "https://github.com/TiddlyWiki/TiddlyWiki5/pull/5981">> the [[text editor stamp toolbar button|Using Stamp]] dropdown to allow sorting by drag and drop
* <<.link-badge-added "https://github.com/TiddlyWiki/TiddlyWiki5/commit/9eda02868f21e9dd1733ffe26352bd7ac96285b4">> (and [[here|https://github.com/TiddlyWiki/TiddlyWiki5/commit/f87b3bfcdba79b6ad198af286bd827c61044891f]]) new MessageCatcherWidget to catch arbitrary messages and execute action strings
* <<.link-badge-modified "https://github.com/TiddlyWiki/TiddlyWiki5/commit/b9647b2c48152dac069a1099a0822b32375a66cf">> [[FieldManglerWidget]] to ensure it doesn't propogate events that it traps
* <<.link-badge-extended "https://github.com/TiddlyWiki/TiddlyWiki5/pull/5597">> [[DropzoneWidget]] to optionally invoke actions after the `tm-import-tiddlers` message has been sent, and to specify an optional `contentTypesFilter` which determines which content types are accepted by the dropzone.
* <<.link-badge-extended "https://github.com/TiddlyWiki/TiddlyWiki5/commit/07caa16e8714afe9a64eb202375e4a2f95da1508">> [[DropzoneWidget]] to also use the specified deserializer for strings either dropped or pasted on to the dropzone
* <<.link-badge-fixed "https://github.com/TiddlyWiki/TiddlyWiki5/pull/5644">> [[ActionListopsWidget]] bug by avoiding concatenating fragments of filter expressions
* <<.link-badge-extended "https://github.com/TiddlyWiki/TiddlyWiki5/commit/3f986861538a3cc5c3c6da578b45d0d9138a6b2b">> [[ActionPopupWidget]] to create floating popups that must be manually cleared
* <<.link-badge-extended "https://github.com/TiddlyWiki/TiddlyWiki5/pull/5648">> (and [[here|https://github.com/TiddlyWiki/TiddlyWiki5/pull/5782]]) [[KeyboardWidget]] to provide additional information variables
* <<.link-badge-extended "https://github.com/TiddlyWiki/TiddlyWiki5/commit/e9e5d37ff01cc1aaa3419798904dac8b0e9775af">> DraggableWidget with option to hide the drag image
* <<.link-badge-added "https://github.com/TiddlyWiki/TiddlyWiki5/pull/5813">> new [[:map filter run prefix|Map Filter Run Prefix]]
* <<.link-badge-added "https://github.com/TiddlyWiki/TiddlyWiki5/pull/5653">> new [[:sort filter run prefix|Sort Filter Run Prefix]]
* <<.link-badge-added "https://github.com/TiddlyWiki/TiddlyWiki5/pull/5612">> [[average Operator]], [[median Operator]], [[variance Operator]] and [[standard-deviation Operator]] for calculating averages of a list of numbers
* <<.link-badge-added "https://github.com/TiddlyWiki/TiddlyWiki5/pull/5673">> [[deserializers filter Operator|deserializers Operator]] for obtaining a list of the available deserializers
* <<.link-badge-added "https://github.com/TiddlyWiki/TiddlyWiki5/pull/5665">> [[format:titlelist operator|format Operator]] for selectively adding double square brackets around titles
* <<.link-badge-added "https://github.com/TiddlyWiki/TiddlyWiki5/commit/83ee363cb4c19246ac977f55e46439dd8a1508ba">> [[charcode Operator]] for easily accessing special characters like tab and linefeed
* <<.link-badge-added "https://github.com/TiddlyWiki/TiddlyWiki5/pull/5252">> support for suffixes to filter run prefixes
* <<.link-badge-extended "https://github.com/TiddlyWiki/TiddlyWiki5/pull/5968">> [[search-replace Operator]] with ''m'' flag for multiline mode
* <<.link-badge-extended "https://github.com/TiddlyWiki/TiddlyWiki5/commit/e6fd0caf6b997c24c116def354b2a65d8909279e">> [[range Operator]] to allow parameters to be specified as separate operands
* <<.link-badge-added "https://github.com/TiddlyWiki/TiddlyWiki5/pull/6055">> [[moduleproperty Operator]] and extended [[modules Operator]] to provide access to internal JavaScript modules
* <<.link-badge-extended "https://github.com/TiddlyWiki/TiddlyWiki5/pull/5361">> [[unusedtitle Macro]] to add ''separator'' and ''template'' parameters
* <<.link-badge-added "https://github.com/TiddlyWiki/TiddlyWiki5/pull/5720">> ''color-scheme'' field to all themes to differentiate between light and dark themes
* <<.link-badge-added "https://github.com/TiddlyWiki/TiddlyWiki5/commit/d25e540dd2f0decf61c52fdc665a28a5dfeda93f">> support for `image/vnd.microsoft.icon` content type
* <<.link-badge-added "https://github.com/TiddlyWiki/TiddlyWiki5/pull/5458">> support for throttling refreshes for changed tiddlers with the title prefix $:/temp/volatile/
* <<.link-badge-added "https://github.com/TiddlyWiki/TiddlyWiki5/commit/89546b3357b0696a7047e6915bd6cd137b589de6">> a hidden setting to control sandboxing of tiddlers of type `text/html`
* <<.link-badge-added "https://github.com/TiddlyWiki/TiddlyWiki5/pull/5707">> text operation [[insert-text|WidgetMessage: tm-edit-text-operation]]
* <<.link-badge-added "https://github.com/TiddlyWiki/TiddlyWiki5/commit/e157d16b724172f752da0ff714847e0c0ca9664d">> ''data-tag-title'' attribute to tag pills
* <<.link-badge-added "https://github.com/TiddlyWiki/TiddlyWiki5/pull/5294">> support for [[dynamic toolbar buttons|How to create dynamic editor toolbar buttons]]
* <<.link-badge-added "https://github.com/TiddlyWiki/TiddlyWiki5/pull/5694">> new [[SystemTag: $:/tags/ControlPanel/Plugins]] for customising the tabs shown under the "Plugins" tab of control panel
* <<.link-badge-added "https://github.com/TiddlyWiki/TiddlyWiki5/commit/59a53e695b28144f8f788469dad7865499d95d79">> support for DateFormat tokens for weekday number and day of year
* <<.link-badge-added "https://github.com/TiddlyWiki/TiddlyWiki5/commit/ebf563ac70b2053fcaed8c544ae83e839878e3bd">> further transliteration pairs for the [[slugify Operator]]
* <<.link-badge-fixed "https://github.com/TiddlyWiki/TiddlyWiki5/commit/e96a54c7531a2d9e07745e27d2015d8d7d09588f">> crash running in client server configuration when 'ETag' header is missing
* <<.link-badge-fixed "https://github.com/TiddlyWiki/TiddlyWiki5/pull/5423">> blank favicon when using lazily loaded images
* <<.link-badge-fixed "https://github.com/TiddlyWiki/TiddlyWiki5/issues/4461">> web server issue with custom path prefix and basic authentication
* <<.link-badge-fixed "https://github.com/TiddlyWiki/TiddlyWiki5/pull/5416">> crash on Node.js with ActionSetFieldWidget when type field is given a value upon new tiddler creation
* <<.link-badge-fixed "https://github.com/TiddlyWiki/TiddlyWiki5/pull/5329">> issue with saving tiddler files with titles that already end in the required extension
* <<.link-badge-fixed "https://github.com/TiddlyWiki/TiddlyWiki5/pull/5465">> several consistency issues with the filesystem plugin
* <<.link-badge-fixed "https://github.com/TiddlyWiki/TiddlyWiki5/issues/5483">> issue with encoding of $:/config/OriginalTiddlerPaths outside the wiki folder
* <<.link-badge-updated "https://github.com/TiddlyWiki/TiddlyWiki5/pull/5628">> the TiddlySpot Saver settings form
* <<.link-badge-added "https://github.com/TiddlyWiki/TiddlyWiki5/pull/5638">> 401 and 403 error messages for PUT saver
* <<.link-badge-extended "https://github.com/TiddlyWiki/TiddlyWiki5/pull/5570">> the [[external JavaScript template|Using the external JavaScript template]] to be easier to use and work more smoothly when offline
* <<.link-badge-fixed "https://github.com/TiddlyWiki/TiddlyWiki5/pull/5931">> incorrect usage of X-Requested-With header for simple HTTP requests
* <<.link-badge-fixed "https://github.com/TiddlyWiki/TiddlyWiki5/commit/a67b1b8bb5dcff5e6e3151844d96bf882ae4a976">> security issue allowing [[access to files|Using the integrated static file server]] outside the `./files/` folder
* <<.link-badge-extended "https://github.com/TiddlyWiki/TiddlyWiki5/commit/a38dc1730010c6a2b6a011aff4818bbc67c04055">> RenderCommand to allow multiple variables to be passed
* <<.link-badge-extended "https://github.com/TiddlyWiki/TiddlyWiki5/commit/0ed32fded996826a59832d7a7555bb16c4a57864">> the Freelinks plugin with a filter to determine which tiddlers can be the targets of freelinks
* <<.link-badge-fixed "https://github.com/TiddlyWiki/TiddlyWiki5/issues/5581">> BibTeX Plugin to report errors more sensibly
* <<.link-badge-modified "https://github.com/TiddlyWiki/TiddlyWiki5/commit/953fb9f237ad78e409c03d4b29b9854d8abf6cdf">> BibTex Plugin to force fieldnames to be lowercase
* <<.link-badge-improved "https://github.com/TiddlyWiki/TiddlyWiki5/pull/5382">> the widget subclassing mechanism to work with widgets that add event listeners in their constructor
* <<.link-badge-improved "https://github.com/TiddlyWiki/TiddlyWiki5/pull/5377">> the Jasmine test suite output
* <<.link-badge-extended "https://github.com/TiddlyWiki/TiddlyWiki5/commit/9f9ce6595b08032a602981f82940ca113cff8211">> wikitext parser with a subclassing mechanism
* <<.link-badge-added "https://github.com/TiddlyWiki/TiddlyWiki5/commit/ef76349c37662e9706acfffc2c2edb51a920183d">> added support for ''utils-browser'' modules
* <<.link-badge-added "https://github.com/TiddlyWiki/TiddlyWiki5/pull/5464">> ''th-before-importing'' hook to allow plugins to inspect or modify the `importTiddler` object before any tiddlers are imported
* <<.link-badge-added "https://github.com/TiddlyWiki/TiddlyWiki5/pull/3797">> ''th-closing-tiddler'' hook when tiddlers are closed
* <<.link-badge-fixed "https://github.com/TiddlyWiki/TiddlyWiki5/pull/5999">> crash with malformed input to `decodeURIComponent()`
* <<.link-badge-fixed "https://github.com/TiddlyWiki/TiddlyWiki5/pull/5376">> issue with [[lookup Operator]] returning "undefined" under some circumstances
* <<.link-badge-fixed "https://github.com/TiddlyWiki/TiddlyWiki5/issues/5396">> crash with unterminated wikitext comments
* <<.link-badge-fixed "https://github.com/TiddlyWiki/TiddlyWiki5/pull/5453">> tiddler info area content bleeding on close animation
* <<.link-badge-fixed "https://github.com/TiddlyWiki/TiddlyWiki5/pull/5401">> runaway regexp when parsing filters
* <<.link-badge-fixed "https://github.com/TiddlyWiki/TiddlyWiki5/pull/5440">> right margin of tag pill when used outside of the tags wrapper
* <<.link-badge-extended "https://github.com/TiddlyWiki/TiddlyWiki5/pull/5455">> upload saver to optionally work without a username or password
* <<.link-badge-fixed "https://github.com/TiddlyWiki/TiddlyWiki5/commit/5e4430dbf9ff66d9a18fbdf3005abcd716efc07d">> RadioWidget to refresh selectively, and to use the ''checked'' attribute correctly
* <<.link-badge-fixed "https://github.com/TiddlyWiki/TiddlyWiki5/pull/5542">> "invert" option of `wiki.search()` method
* <<.link-badge-fixed "https://github.com/TiddlyWiki/TiddlyWiki5/commit/226df2ad7d2978d3d7400d94767a0503e495cf98">> exporting of tiddlers that begin and end with double quotes
* <<.link-badge-improved "https://github.com/TiddlyWiki/TiddlyWiki5/commit/d56e8764a1f02a214df5da1cc95191be2da2491b">> accessibility of button widget when controlling a popup
* <<.link-badge-fixed "https://github.com/TiddlyWiki/TiddlyWiki5/commit/d6ea369f5ef9d3092a360a4286a99902df37782b">> EditTextWidget to use default text for missing fields
* <<.link-badge-fixed "https://github.com/TiddlyWiki/TiddlyWiki5/pull/5552">> css-escape-polyfill to work under Node.js
* <<.link-badge-fixed "https://github.com/TiddlyWiki/TiddlyWiki5/commit/dbd3f835bf8399ed1a3da7cc322ec9b6ab783d53">> (and [[here|https://github.com/TiddlyWiki/TiddlyWiki5/commit/fb4d77ef46e23c23f4e46c13f4a529aa29a27dcd]]) crash when sorting by non-string fields
* <<.link-badge-fixed "https://github.com/TiddlyWiki/TiddlyWiki5/pull/5711">> (and [[here|https://github.com/TiddlyWiki/TiddlyWiki5/pull/5868]]) some bugs in the [[EventCatcherWidget]], introduced new `stopPropagation` attribute and new syntax for specifying actions
* <<.link-badge-fixed "https://github.com/TiddlyWiki/TiddlyWiki5/pull/5691">> CurrentTiddler variable consistency in subfilters and prefixes
* <<.link-badge-fixed "https://github.com/TiddlyWiki/TiddlyWiki5/commit/485779f5b2136b7bcd739352b56188d94b0eb9e4">> crash when accessing variables in filters that don't have a widget context
* <<.link-badge-fixed "https://github.com/TiddlyWiki/TiddlyWiki5/commit/8fbf52e419e71d726ea32b6c44e3ccfc4245d825">> unnecessary triggering of reload warning when JavaScript tiddlers are not subsequently imported
* <<.link-badge-fixed "https://github.com/TiddlyWiki/TiddlyWiki5/pull/5521">> minor issue with import pragma
* <<.link-badge-fixed "https://github.com/TiddlyWiki/TiddlyWiki5/pull/5700">> leading and trailing whitespace in themes
* <<.link-badge-fixed "https://github.com/TiddlyWiki/TiddlyWiki5/pull/5469">> configuration list of HTML5 block elements
* <<.link-badge-fixed "https://github.com/TiddlyWiki/TiddlyWiki5/pull/5692">> shape and color for disabled button to work with `tc-btn-invisible` class
* <<.link-badge-fixed "https://github.com/TiddlyWiki/TiddlyWiki5/pull/5473">> inconsistent spacing of view toolbar items
* <<.link-badge-fixed "https://github.com/TiddlyWiki/TiddlyWiki5/commit/2720072b23593c87e7909d12c75c5b136e1bdf99">> crash when assigning new value to file input controls
* <<.link-badge-fixed "https://github.com/TiddlyWiki/TiddlyWiki5/pull/6003">> [[text editor stamp button|Using Stamp]] to work with prefixes and suffixes in shadow tiddlers
* <<.link-badge-fixed "https://github.com/TiddlyWiki/TiddlyWiki5/commit/62b8a83741e6eccfaead5ea7960c0400b6db5f4a">> Internet Explorer crash when pasting text using an HTA
* <<.link-badge-fixed "https://github.com/TiddlyWiki/TiddlyWiki5/pull/6036">> bug with `[all[shadows]]` sometimes returning overridden shadow tiddlers
* <<.link-badge-fixed "https://github.com/TiddlyWiki/TiddlyWiki5/pull/6044">> refresh bug with radio widget where the tc-radio-selected class is not correctly updated
* <<.link-badge-fixed "https://github.com/TiddlyWiki/TiddlyWiki5/commit/f6eadbd1c900b5f779ebbf3c539192cd3c2b98cc">> crash with reading invalid JSON files
[[@Jermolene|https://github.com/Jermolene]] would like to thank the contributors to this release who have generously given their time to help improve TiddlyWiki:
