Javascript: capture value to use in form action field of Laravel app -

i have laravel app javascript function captures data i'm using dynamically fill modal box.

$(function() {     $('#edit-auction-modal').on("show.bs.modal", function (e) {      var auctionid = $(e.relatedtarget).data('id');      console.log(auctionid);      //auctionid has correct value selected auction. needs used in view file     }); }); 

in view file, have modal box form (to update fields).

<div id="edit-auction-modal" class="modal fade" tabindex="-1" role="dialog" aria-labelledby="mymodallabel" aria-hidden="true">         <div class="modal-dialog">             <div class="modal-content">                 <div class="panel panel-info">                   <div class="panel-heading">                     <div class="panel-title" id="auctionlabel"></div>                   </div>                 </div>                 <div class="modal-body edit-content" style="padding-top:10px">                      <form method="post" action="{!! route('admin_auctions_update', ['id' => auctionid ]) !!}">                       {{ csrf_field() }}                       {{ method_field('put') }}                       ....                      </form> 

using above code, nothing gets updated tries send 'auctions/auctionid/update' instead of 'auctions/1/update' or 'auctions/2/update'

how can change can use value of auction0id (from js file) in view?

should pretty trivial think js skills below average...

you try this:

$(function() {     $('#edit-auction-modal').on("show.bs.modal", function (e) {         var auctionid = $(e.relatedtarget).data('id');         var pattern = /(auctions\/)(.+)(\/update)/;         var action = $('form').attr('action');         $('form').attr('action', action.replace(pattern, "$1" + auctionid + "$3"));     }); }); 

---

explanation:

the view handled server-side , defines html sent browser. don't run php code past point. since auctionid exists result of client-side events, tool modifying action attribute javascript.

so, in view include js script, assume are. also, write original action {!! route('admin_auctions_update', ['id' => 0 ]) !!} (0 default placeholder value).

finally regular expressions explanation: parentheses define capture groups, can access number. so, first 1 contains string contents before id replaced, second 1 id itself, , third 1 rest of string.