Select2 open dropdown on focus

Question

I have a form with multiple text inputs and some select2 elements   Using the keyboard to tab between fields works fine - the Select2 element behaves like a form element and receives focus when tabbing  I was wondering if it is possible to open the dropdown when the Select2 element gets focus   Here s what I ve tried so far       myid   select2   on  select2-focus   function           this  select2  open          But using this code makes the dropdown to open again after a selection is made

User · Answer

This worked for me using Select2 v4 0 3    Initialize Select2  jQuery   js-select   select2        Make Select2 respect tab focus function select2Focus        jQuery window  keyup function  e            var code    e keyCode   e keyCode   e which           if  code    9  amp  amp  jQuery   select2-search  field focus   length                jQuery   js-select   select2  open                         select2Focus      Fork of Irvin Dominin s demo  http   jsfiddle net 163cwdrw

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I ve tried a pretty ugly solution but it fixed my problem       var tabPressed   false         document  keydown function  e               Listening tab button          if  e which    9                tabPressed   true                           document  on  focus     select2   function             if  tabPressed                tabPressed   false                this  siblings  select   select2  open

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I tried a number of these and finally came up with the following that works for me with Select2 4 0 1  element is the  lt select gt  element     data element  select2 on  focus   function  e          element  select2  open

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Something easy that would work on all select2 instances on the page     document  on  focus     select2   function           this  siblings  select   select2  open          UPDATE  The above code doesn t seem to work properly on IE11 Select2 4 0 3  PS  also added filter to select only single select fields  Select with multiple attribute doesn t need it and would probably break if applied   var select2 open     open select2 dropdown on focus   document  on  focus     select2-selection--single   function e        select2 open     this  parent   parent   siblings  select        select2 open select2  open            fix for ie11 if   rv 11 0 i test navigator userAgent           document  on  blur     select2-search  field   function  e            select2 open select2  close

User · Answer

a bit late    but to share my code using select2 4 0 0      my id   select2        my id   next   select2   find   select2-selection   focus function             my id   select2  open

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KyleMit s answer worked for me  thank you    but I noticed that with select2 elements that allow for searching  trying to tab to the next element wouldn t work  tab order was effectively lost   so I added code to set focus back to the main select2 element when the dropdown is closing     document  on  focus     select2   function  e        if  e originalEvent            var s2element     this  siblings  select            s2element select2  open                Set focus back to select2 element on closing          s2element on  select2 closing   function  e                s2element select2  focus

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Here is an alternate solution for version 4 x of Select2  You can use listeners to catch the focus event and then open the select       test   select2          Initialisation here    data  select2   listeners      push function name  target         if name     focus               this  element  select2  open                Find the working example here based the exampel created by  tonywchen

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Probably after the selection is made a select2-focus event is triggered   The only way I found is a combination of select2-focus and select2-blur event and the jQuery one event handler   So the first time the element get the focus  the select2 is opened for one time  because of one   when the element is blurred the one event handler is attached again and so on   Code       test   select2       data             id  0          text   enhancement                   id  1          text   bug                   id  2          text   duplicate                   id  3          text   invalid                   id  4          text   wontfix              width   300px     one  select2-focus   select2Focus  on  select2-blur   function            this  one  select2-focus   select2Focus      function select2Focus           this  select2  open        Demo  http   jsfiddle net IrvinDominin fnjNb   UPDATE  To let the mouse click work you must check the event that fires the handler  it must fire the open method only if the event is focus  Code   function select2Focus         if    focus  test event type               this  select2  open              Demo  http   jsfiddle net IrvinDominin fnjNb 4   UPDATE FOR SELECT2 V 4 0  select2 v 4 0 has changed its API s and dropped the custom events  see https   github com select2 select2 issues 1908   So it s necessary change the way to detect the focus on it   Code       js-select   select2       placeholder   Select       width   100           js-select   next   select2   find   select2-selection   one  focus   select2Focus  on  blur   function            this  one  focus   select2Focus      function select2Focus           this  closest   select2   prev  select   select2  open        Demo  http   jsfiddle net IrvinDominin xfmgte70

User · Answer

For me using Select2 full js Version 4 0 3 none of the above solutions was working the way it should be  So I wrote a combination of the solutions above  First of all I modified Select2 full js to transfer the internal focus and blur events to jquery events as  Thomas Molnar  did in his answer   EventRelay prototype bind   function  decorated  container   container        var self   this      var relayEvents            open    opening          close    closing          select    selecting          unselect    unselecting          focus    blur           And then I added the following code to handle focus and blur and focussing the next element      myId   select2            one  select2 focus   select2Focus  on  select2 blur   function          var select2     this  data  select2        if  select2 isOpen      false                  this  one  select2 focus   select2Focus            on  select2 close   function          setTimeout function                     Find the next element and set focus on it              focus   closest  tr   next  tr   find  select visible input visible   focus                       0       function select2Focus         var select2     this  data  select2        setTimeout function             if   select2 isOpen                  select2 open                     0

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I ve had the problem which was two pronged   1  In a form with multiple select2 elements  the dropdown won t open on tab  and you need to press space key to open it  2  Once you have made a selection  the tabindex won t be honored and you have to manually click on the next input field    While the usual suggestions worked  I came up with my own version  since a library script was doing the conversion of normal select to select2  and hence I had no control over this initialization     Here is the code that worked for me   Tab to open      document  on  focus     select2   function           this  siblings  select   select2  open          Move to next on selection    var inputs      input select       You can use other elements such as textarea  button etc                                     depending on input field types you have used    select   on  select2 close  function        var pos     inputs  index this    1      var next     inputs  eq pos       setTimeout  function             next focus            if  next siblings   select2   length      If it s a select             next select2  open                     500     The delay is required to allow default events to occur       Hope this helps

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Somehow select2Focus didn t work here with empty selection  couldn t figured out the issue  therefore I added manual control when after focus event auto open get s triggered   Here is coffeescript       myid   select2      on  select2-blur   - gt        this  data  select2-auto-open    true      on  select2-focus   - gt        this  data  select2   open   if   this  data  select2-auto-open       false     on  select2-selecting   - gt        this  data  select2-auto-open    false

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Working Code for v4 0    including 4 0 7   The following code will open the menu on the initial focus  but won t get stuck in an infinite loop when the selection re-focuses after the menu closes      on first focus  bubbles up to document   open the menu   document  on  focus     select2-selection select2-selection--single   function  e        this  closest   select2-container   siblings  select enabled   select2  open            steal focus during close - only capture once and stop propogation    select select2   on  select2 closing   function  e        e target  data  select2    selection one  focus focusin   function  e        e stopPropagation                Explanation  Prevent Infinite Focus Loop  Note  The focus event is fired twice   Once when tabbing into the field Again when tabbing with an open dropdown to restore focus     We can prevent an infinite loop by looking for differences between the types of focus events   Since we only want to open the menu on the initial focus to the control  we have to somehow distinguish between the following raised events     Doing so it a cross browser friendly way is hard  because browsers send different information along with different events and also Select2 has had many minor changes to their internal firing of events  which interrupt previous flows     One way that seems to work is to attach an event handler during the closing event for the menu and use it to capture the impending focus event and prevent it from bubbling up the DOM   Then  using a delegated listener  we ll call the actual focus -  open code only when the focus event bubbles all the way up to the document  Prevent Opening Disabled Selects  As noted in this github issue  4025 - Dropdown does not open on tab focus  we should check to make sure we only call  open  on  enabled select elements like this     this  siblings  select enabled   select2  open     Select2 DOM traversal  We have to traverse the DOM a little bit  so here s a map of the HTML structure generated by Select2    Source Code on GitHub  Here are some of the relevant code sections in play    on  mousedown       trigger  toggle    on  toggle        toggleDropdown    toggleDropdown      open    on  focus       trigger  focus   on  close       selection focus      It used to be the case that opening select2 fired twice  but it was fixed in Issue  3503 and that should prevent some jank  PR  5357 appears to be what broke the previous focus code that was working in 4 05  Working Demo in jsFiddle  amp  Stack Snippets    x000D   x000D      select2   select2      x000D   x000D     on first focus  bubbles up to document   open the menu x000D    document  on  focus     select2-selection select2-selection--single   function  e    x000D      this  closest   select2-container   siblings  select enabled   select2  open    x000D      x000D   x000D     steal focus during close - only capture once and stop propogation x000D     select select2   on  select2 closing   function  e    x000D      e target  data  select2    selection one  focus focusin   function  e    x000D      e stopPropagation    x000D        x000D      x000D   lt link href  https   cdnjs cloudflare com ajax libs select2 4 0 7 css select2 css  rel  stylesheet   gt  x000D   lt script src  https   cdnjs cloudflare com ajax libs jquery 2 1 3 jquery js  gt  lt  script gt  x000D   lt script src  https   cdnjs cloudflare com ajax libs select2 4 0 7 js select2 js  gt  lt  script gt  x000D   x000D   lt select class  select2  style  width 200px   gt  x000D     lt option value  1  gt Apple lt  option gt  x000D     lt option value  2  gt Banana lt  option gt  x000D     lt option value  3  gt Carrot lt  option gt  x000D     lt option value  4  gt Donut lt  option gt  x000D   lt  select gt  x000D   x000D   x000D    Tested on Chrome  FF  Edge  IE11

User · Answer

For Version 3 5 4  Aug 30  2015 and earlier   The current answer is only applicable to versions 3 5 4 and before  where select2 fired blur and focus events  select2-focus  amp  select2-blur    It attaches a one-time use handler using   one to catch the initial focus  and then reattaches it during blur for subsequent uses       select2   select2        one  select2-focus   OpenSelect2     on  select2-blur   function  e          this  one  select2-focus   OpenSelect2        function OpenSelect2       var  select2     this  data  select2      setTimeout function         if    select2 opened       select2 open           0         I tried both of  irvin-dominin-aka-edward s answers  but also ran into both problems  having to click the dropdown twice  and that Firefox throws  event is not defined     I did find a solution that seems to solve the two problems and haven t run into other issue yet  This is based on  irvin-dominin-aka-edward s answers by modifying the select2Focus function so that instead of executing the rest of the code right away  wrap it in setTimeout   Demo in jsFiddle  amp  Stack Snippets   x000D   x000D      select2   select2     x000D     one  select2-focus   OpenSelect2  x000D     on  select2-blur   function  e    x000D        this  one  select2-focus   OpenSelect2  x000D       x000D   x000D  function OpenSelect2     x000D    var  select2     this  data  select2    x000D    setTimeout function     x000D      if    select2 opened       select2 open      x000D       0     x000D    x000D  body   x000D    margin  2em  x000D    x000D   x000D   form-control   x000D    width  200px    x000D    margin-bottom  1em  x000D    padding  5px  x000D    display  flex  x000D    flex-direction  column  x000D    x000D   x000D  select   x000D    border  1px solid  aaa  x000D    border-radius  4px  x000D    height  28px  x000D    x000D   lt link rel  stylesheet  type  text css  href  https   cdnjs cloudflare com ajax libs select2 3 5 4 select2 css  gt  x000D   lt script type  text javascript  src  https   cdnjs cloudflare com ajax libs jquery 2 1 3 jquery js  gt  lt  script gt  x000D   lt script type  text javascript  src  https   cdnjs cloudflare com ajax libs select2 3 5 4 select2 js  gt  lt  script gt  x000D   x000D     x000D     lt div class  form-control  gt  x000D       lt label for  foods1   gt Normal lt  label gt  x000D       lt select id  foods1   gt  x000D         lt option value    gt  lt  option gt  x000D         lt option value  1  gt Apple lt  option gt  x000D         lt option value  2  gt Banana lt  option gt  x000D         lt option value  3  gt Carrot lt  option gt  x000D         lt option value  4  gt Donut lt  option gt  x000D       lt  select gt  x000D   lt  div gt  x000D   x000D   lt div class  form-control  gt  x000D     lt label for  foods2   gt Select2 lt  label gt  x000D     lt select id  foods2  class  select2   gt  x000D       lt option value    gt  lt  option gt  x000D       lt option value  1  gt Apple lt  option gt  x000D       lt option value  2  gt Banana lt  option gt  x000D         lt option value  3  gt Carrot lt  option gt  x000D         lt option value  4  gt Donut lt  option gt  x000D       lt  select gt  x000D     lt  div gt  x000D   x000D   x000D

User · Answer

The problem is  that the internal focus event is not transformed to jQuery event  so I ve modified the plugin and added the focus event to the EventRelay on line 2063 of Select2 4 0 3  EventRelay prototype bind   function  decorated  container   container        var self   this      var relayEvents            open    opening          close    closing          select    selecting          unselect    unselecting          focus           Then it is enough to open the select2 when the focus occurs      select2   on  select2 focus   function evt         this  select2  open         Works well on Chrome 54  IE 11  FF 49  Opera 40

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I tried these solutions with the select2 version 3 4 8 and found that when you do blur  the select2 triggers first select2-close then select2-focus and then select2-blur  so at the end we end up reopening forever the select2   Then  my solution is this one       elemId   on  select2-focus   function        var select2     this  data  select2        if    this  data  select2-closed                this  data  select2-closed   false          return           if   select2 opened              select2 open            on  select2-close   function          this  data  select2-closed   true

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an important thing is to keep the multiselect open all the time  The simplest way is to fire open event on  conditions  in your code    lt select data-placeholder  Choose a Country     multiple class  select2-select  id  myList  gt       lt option value  United States  gt United States lt  option gt       lt option value  United Kingdom  gt United Kingdom lt  option gt       lt option value  Afghanistan  gt Afghanistan lt  option gt       lt option value  Aland Islands  gt Aland Islands lt  option gt       lt option value  Albania  gt Albania lt  option gt       lt option value  Algeria  gt Algeria lt  option gt   lt  select gt    javascript       select2-select   select2  closeOnSelect false        myList   select2  open      fiddle  http   jsfiddle net xpvt214o 153442

[javascript] Select2 open dropdown on focus

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