• Do not close on select if Ctrl or Meta (Cmd) keys being held (#5222)

• Fixed issue where single select boxes would automatically reopen when they were closed (#5490, #5492)

• Move almost and jquery-mousewheel to devDependencies (#5489)

• Add style property to package.json (#5019)
• Implement clear and clearing events (#5058)
• Add scrollAfterSelect option (#5150)
• Add missing diacritics (#4118, #4337, #5464)

• Fix up arrow error when there are no options in dropdown (#5127)
• Add ; before beginning of factory wrapper (#5089)
• Fix IE11 issue with select losing focus after selecting an item (#4860)
• Clear tooltip from select2-selection__rendered when selection is cleared (#4640, #4746)
• Fix keyboard not closing when closing dropdown on iOS 10 (#4680)
• User-defined types not normalized properly when passed in as data (#4632)
• Perform deep merge for Defaults.set() (#4364)
• Fix "the results could not be loaded" displaying during AJAX request (#4356)
• Cache objects in Utils.__cache instead of using $.data (#4346, #5486)
• Removing the double event binding registration of selection:update (#4306)

• Improve .select2-hidden-accessible (#4908)
• Add role and aria-readonly attributes to single selection dropdown value (#4881)

• Add Turkmen translations (tk) (#5125)
• Fix error in French translations (#5122)
• Add Albanian translation (sq) (#5199)
• Add Georgian translation (ka) (#5179)
• Add Nepali translation (ne) (#5295)
• Add Bangla translation (bn) (#5248)
• Add removeAllItems translation for clear "x" title (#5291)
• Fix wording in Vietnamese translations (#5387)
• Fix error in Russian translation (#5401)

• Remove duplicate CSS selector in classic theme (#5115)

• Replace autocapitalize=off with autocapitalize=none (#4994)

• Vietnamese: remove an unnecessary quote mark (#5059)
• Czech: Add missing commas and periods (#5052)
• Spanish: Update the 'errorLoading' message (#5032)
• Fix typo in Romanian (#5005)
• Improve French translation (#4988)
• Add Pashto translation (ps) (#4960)
• Add translations for lower and upper Sorbian (dsb and hsb) (#4949)
• Updates to Slovak (#4915)
• Fixed Norwegian inputTooShort message (#4817, 4896)
• Add Afrikaans translation (af) (#4850)
• Add Bosnian translation (bs) (#4504)

• Make tag matching case insensitive [https://github.com/select2/select2/commit/cb9a90457867ffb14c7b1550bb67e872e0a5c2dd, https://github.com/select2/select2/commit/1167bace78cd3b1a918c1b04f3bac54674eab62b]
• Support selecting options with blank or 0 option values [https://github.com/select2/select2/commit/16b4840c0e2df0461998e3b464ee0a546173950d, https://github.com/select2/select2/commit/0358ee528765157234643d289bce6b8ca5889c72]

• Fix issue with entire form losing focus when tabbing away from a Select2 control (#4419)
• Fix UMD support for CommonJS [https://github.com/select2/select2/commit/45a877345482956021161203ac789c25f40a7d5e]

• Github Pages documentation has been deprecated, replaced with https://github.com/select2/docs
• Add django-autocomplete-light to integrations [select2#4597]
• Correct typo in options page [select2#4389]
• Correct misspelling in AJAX query parameters example [select2#4435]
• "highlight" should be "focus" in focus example [select2#4441]
• Correct misspelling in <select> serialization example [select2#4538]
• Correct typos in documentation [select2#4663]

• Add errorLoading Hungarian translation [https://github.com/select2/select2/commit/7d1d13352321e21670ff1c6cba7413aa264fd57a]
• Add errorLoading German translation [https://github.com/select2/select2/commit/4df965219ea4c39147fde9335bc260840465933a]
• Add Slovene language [https://github.com/select2/select2/commit/8e6422c570a87da8d89c45daf0d253695a943c84]
• Add errorLoading Galician translation [https://github.com/select2/select2/commit/8fcc6202c37f4e06d951342bf142a3b906b6b8e3]
• Add errorLoading Thai translation [https://github.com/select2/select2/commit/625fc78ee616baedf64aa37357403b4b72c7363c]
• Add searching and errorLoading Finnish translations [select2#4730]
• Add errorLoading Turkish translation [https://github.com/select2/select2/commit/fd4a0825315c7055347726d5818c999279f96ff8, https://github.com/select2/select2/commit/751b36767f9f28b9de9428d5e8035c9a404915d9]
• Add Armenian language [https://github.com/select2/select2/commit/f6fa52dcc02341df1523f50348f2effc54ee2911]

This is the third bugfix release of Select2 4.0.0. It builds upon the second bugfix release and fixes many common issues.

• The old dropdownAutoWidth option now properly works [https://github.com/select2/select2/commit/fe26b083eb830836061de1458e483782cefef424]
• A focus event on the original <select> is now handled [https://github.com/select2/select2/commit/31e7a1d4c52ed7477769fcad5d15166ae3c9b4d0]
• Adding and removing options now refreshes the selection automatically [https://github.com/select2/select2/commit/ea79a197e0ffe55aa600eed6d18cbd1c804c3176]

• select2('option') no longer mutate the arguments when working on multiple elements [https://github.com/select2/select2/commit/c2c1aeef31c95c6df5545c900a4e1782d712497c]
• Better detect aborted requests [https://github.com/select2/select2/commit/cfb66f5e4f71a56c46a6890c5dde4b7f24f11fa8]
• New options are now properly created during tokenization [https://github.com/select2/select2/commit/3b8cd2e36990e695e4cb4b966c8658e7ca1574dc]
• Fix positioning bug with non-static parents for the dropdown [select2#4267]
• Infinite scrolling no longer resets the keyboard focus [https://github.com/select2/select2/commit/e897d008a672da262ba84cee2a144578696ada29, https://github.com/select2/select2/commit/9f581285d88128b29a01fc1e5fd2d445d610b553]
• selectOnClose now works properly with closeOnSelect [https://github.com/select2/select2/commit/481c43883e23874e9c35879d173eb8cc5b994b12]
• Apply ajax.delay to empty search terms as well [https://github.com/select2/select2/commit/4b9e02f02211248be25ac4c16d4635cf38237bb9]

• Added example for attaching event listeners [https://github.com/select2/select2/commit/84d6b5d840f7f4e6b7a2fb3f08424bf5495c876d]
• Correct link to the Select2 Bootstrap Theme [select2#4318]
• Added example for using a <label> [https://github.com/select2/select2/commit/3bc7f4ac78b58eff8cd17b3273596638c3c9c5c1]
• Add documentation for ajax.url [https://github.com/select2/select2/commit/5a831afb9a7d46e8f20aec21164cfbfd182024de]
• Added favicon [select2#4379]

• Add Khmer translation [select2#4246]
• Added Norwegian bokmaal for errorLoading [select2#4259]
• Fixed pluralization in Lithuanian translation [https://github.com/select2/select2/commit/5b5eddd183c87bf43165b3a98e03eabe10e9fa58]
• Add French translation for errorLoading [https://github.com/select2/select2/commit/b1ea28bb7d8c02b3b352f558031ccfc8041122eb]
• Add Greek translation [select2#4139]

This is the second bugfix release of Select2 4.0.0. It builds upon the first release candidate of Select2 4.0.2 with some minor improvements.

• Added insertTag option to control the placement of the tags option [select2#4008]
• Added handler for AJAX errors [select2#3501]
• Added insertTag to control the tag position [select2#4008]

• Fixed positioning issues with static dropdown parents [select2#3970]
• Fixed existing selections not always being respected with array data [select2#3990]
• Sanitize automatically generated ids so CSS identifiers can be used [select2#3618]
• Recursively apply defaults so AJAX defaults can be set [https://github.com/select2/select2/commit/983cd8e765c5345bfe7d3bdcc3b0c882a35461ca]
• No need to recalculate the top of the dropdown twice [select2#4155]

• Updated Bootstrap and Font Awesome dependencies [https://github.com/select2/select2/commit/a5e539b509778eabeb8ce79e191b3ee1e81f6deb, https://github.com/select2/select2/commit/81a4a68b113e0d3e0fb1d0f8b1c33ae1b48ba04f, https://github.com/select2/select2/commit/6369f5f173fb81ec692213782945cc737e248da5]
• Use Jekyll's highlighting instead of prettify [https://github.com/select2/select2/commit/54441e6a22be3969dd934ccb769f5d7dde684bfb, https://github.com/select2/select2/commit/74387b98632c75b06d15d83ad5359b9daf0f5dcb, https://github.com/select2/select2/commit/a126b53b4c90fac33b5d855894647cd8bcac3558, https://github.com/select2/select2/commit/75163d67cb80e4279965a97e9eeda5b171806085]
• Corrected responsive width example to properly show it working [https://github.com/select2/select2/commit/63d531a9c0ab51f05327492a56f3245777762b45]
• Replaced protocol-relative URLs with HTTPS protocol [select2#4127]
• Code snippets for mapping id and text [select2#4086]
• Document how to trigger change just for Select2 [select2#3620]
• Added notes about DOM events [https://github.com/select2/select2/commit/37dbe059fce4578b46b7561e6243b7fdc63ac002]

• Correct Romanian translation [https://github.com/select2/select2/commit/72d905f9e026d49e7c600f37a1ce742c404654d7]

This is the first bugfix release of Select2 4.0.0. It builds upon the first release candidate of Select2 4.0.1 with some minor improvements.

• The option container is now passed in as the second argument when templating selections using templateResult [https://github.com/select2/select2/commit/dc516e7073605723be59bc727b96a3b3dea1ae5a]
• The option container is now passed in as the second argument when templating selections using templateSelection [select2#3324]
• You can immediately start typing to search when tabbing into a multiple select [https://github.com/select2/select2/commit/02cca7baa7b78e73cdcf393172ee3a54be387167, https://github.com/select2/select2/commit/79cdcc0956e242c1ce642bbaa93e538c54f4be0]
• All parameters passed in for AJAX requests are now set as query string parameters by default [select2#3548]

• The search box will now be properly sized after removing a selection [https://github.com/select2/select2/commit/5f80c5d9f81f3c5398c3e6e3e84fd6c67c8873f1]
• Dropdown results will now be spoken by screen readers [https://github.com/select2/select2/commit/9fae3d74e373fc646da4e39a0c2ab11efa808c3f]
• Options are now properly cloned when initializing multiple instances at once [https://github.com/select2/select2/commit/3c8366e8769233a6b20ade934fe629279e7be6ff]
• selectOnClose and now be used with closeOnSelect without getting a stack overflow [https://github.com/select2/select2/commit/393ca4cf7f7f7097d3a994bda3dbf195e945eba1]
• Fixed positioning with non-static parents [https://github.com/select2/select2/commit/c9216b4b966653dd63a67e815b47899ef5325298]
• Fixed bug where multiple selects with placeholders were buggy in IE [select2#3300]
• Fixed bug where AJAX selects could not be initialized with array data [select2#3375]
• :all: is now correctly removed when used in containerCss and dropdownCss options [select2#3464]
• Fixed bug where the multiple select search box would appear on the left in RTL mode [select2#3502]
• Change ALT + UP to close the dropdown instead of opening it [https://github.com/select2/select2/commit/d2346cc33186c2a00fa2dad29e8e559c42bfea00]
• Fix focus issue with the multiple select search box when the change event was triggered [https://github.com/select2/select2/commit/698fe7b9e187e182f679aa679eb8b0ecb64a846b, https://github.com/select2/select2/commit/88503d2c67dc7f4fb9395a17f17edfe4948cf738, https://github.com/select2/select2/commit/dd2990adead92593a2dffff6ae004ea8b647d130]
• Fix bug in ArrayAdapter where the existing <option> data would be used instead of the array data [select2#3565]
• Remove random call to $dropdownContainer.width() in the AttachBody decorator [select2#3654]
• Fix memory leak in AttachBody decorator [https://github.com/select2/select2/commit/671f5a2ce21005090e0b69059799cd3dd1fbbf84]
• Selections can no longer be removed when Select2 is in a disabled state [https://github.com/select2/select2/commit/68d068f1d2c7722d011d285a291d1f974bf09772, https://github.com/select2/select2/commit/7d8f86cbf85ebd2179195ff6a2a7a1c5dcb9da58]
• Remove redundant open event trigger [select2#3507]
• Correct references to this in ajax.data and ajax.url callback functions [select2#3361]
• Apply select2('option') calls on all elements [select2#3495]

• Fixed original <select> not always being hidden correctly in some cases [select2#3301]
• Fix potential issue with Bootstrap's gradients in Internet Explorer [select2#3307]
• Improve compatibility with Zurb Foundation [select2#3290]
• Remove padding on mobile safari search field in multiple selects [select2#3605]
• Fix the clear button appearing beneath long text [select2#3306]
• Migrate the CSS classes for the "Loading more results" message to BEM [select2#3889]
• Fix inline search not displaying properly in Safari [select2#3459]

• New documentation theme designed by @fk [select2#3376, select2#3467, select2#3488]
• Update ajax example to reflect pagination [select2#3357]
• Fix incorrect option name in maxiumSelectionLength example [select2#3454]
• Fix typos in the disabled mode/results examples [select2#3665]
• Fix Option parameters in the 4.0 announcement [select2#3547]
• Fix invalid JSON in the tags example within the 4.0 announcement [select2#3637]

• Added Cyrillic variant of the Serbian language [select2#3943]
• Corrected Thai "no results found" translation [select2#3782]
• Swapped the inputTooLong and inputTooShort messages in the Galician translation [select2#3291]
• Fix improper grammar in Dutch translation [select2#3692]
• Add Japanese translation [select2#3477]
• Polish translation: Fixed typo in maximum selected message [select2#3587]
• Add Malay translation [select2#3635]
• Add errorLoading for Indonesian translation [select2#3635]
• Correct grammar issues in Hebrew translation [select2#3911]
• Add errorLoading for Danish translation [select2#3870]
• Add Arabic translation [select2#3859]

This builds upon the second release candidate, so review all previous release notes before upgrading from previous versions of Select2.

• jQuery 1.7.2+
• Modern browsers (Chrome, Firefox, Safari)
• Internet Explorer 8+

• Fully compatible with AMD and UMD based loaders.
• Advanced plugin system that uses custom adapters.
• Full support for jQuery.noConflict.
• A <select> is the recommended element and can be used for all options. There is limited backwards-compatible support for the <input> element in full builds.
• Declarative configuration through data-* attributes
• Easy to configure theme system and new default theme
• You can use more specific locales (like en-US) and Select2 will be able to determine what translation files to load.

• Select2 now uses the MIT license
• The full build of Select2 no longer includes jQuery - You must include jQuery separately on your page.
• Select2 will prevent the inner scrolling of modals (and other scrollable containers) when it is open to prevent the UI from breaking. Read more at the commit.
• jQuery is no longer listed as a dependency in the bower.json/component.json files.
• <select> has replaced <input type="hidden" /> for all options (including remote data)
• The matcher has been revamped to include full context, a compatibility module (select2/compat/matcher) has been created
• The display always reflects the order data is sent to the server
• The click mask is no longer the default (again). You can get back the old functionality by wrapping your selectionAdapter with the ClickMask (select2/selection/clickMask) decorator.
• Select2 no longer stops the propagation of events happening within the dropdown and selection. You can use the StopPropagation modules available in the full builds to prevent this. [https://github.com/select2/select2/commit/8f8140e3b00c5d5bb232455137c4c633d7da4275]
• The enter key no longer toggles the state of multiple select items in the results, but instead will only select them. Use CTRL + Space instead to toggle the state. [https://github.com/select2/select2/commit/017c20109471fa5b835603faf5dc37f7c2c2ea45]
• Warnings will now be triggered in the developer console if Select2 detects an unsupported configuration.

• The default value of the width option has been changed from style to resolve.
• The copy value for the width option has been renamed to style.

• formatSelection -> templateSelection
• formatResult -> templateResult
• sortResults -> sorter
• createSearchChoice -> createTag
• selectOnBlur -> selectOnClose
• ajax.jsonpCallback -> ajax.jsonp
• ajax.results -> ajax.processResults
• tags: [array,of,data] -> data: [array,of,data], tags: true
• placeholderOption has been replaced by placeholder.id (placeholder -> placeholder.text)

• formatNoMatches -> language.noMatches
• formatSearching -> language.searching
• formatInputTooShort -> language.inputTooShort
• formatInputTooLong -> language.inputTooLong
• formatAjaxError -> language.errorLoading
• formatLoading -> language.loadingMore
• formatSelectionTooBig -> language.maximumSelected

• initSelection - This is no longer needed with <select> tags. Limited backwards compatibility in the full build.
• id - Data objects should now always have id and text attributes that are strings, use $.map when migrating
• query - Use a custom data adapter instead. Limited backwards compatibility in the full build.
• ajax.params - All parameters passed to ajax will be passed to the AJAX data transport function

• .select2("val", [value]) -> .val([value])
• .select2("enable", !disabled) -> .prop("disabled", disabled)

• .select2("onSortStart") and .select2("onSortEnd") - A custom selection adapter should be created instead
• .select2("data", data) - Create the <option> tags for the objects that you would like to set, and set the .val to select them
• .select2("readonly") - There is no way to make a <select> element read-only, disable it instead

• select2:closing is triggered before the dropdown is closed
• select2:select is triggered when an option is selected

• select2-close is now select2:close
• select2-open is now select2:open
• select2-opening is now select2:opening
• select2-selecting is now select2:selecting
• select2-removed is now select2:unselect
• select2-removing is now select2:unselecting

• select2-clearing has been removed in favor of select2:unselecting
• select2-highlight
• select2-loaded
• select2-focus - Use the native focus event instead
• select2-blur - Use the native blur event instead
• All extra properties from the change event were removed
  • val can be retrieved with $element.val() instead
  • added can be retrieved by listening to select2:select
  • removed can be retrieved by listening to select2:unselect