weird string concat in JavaScript -

i got weird on string concat in jquery follow :

      var name = button.data('name')       var emailname = button.data('email')       var username = button.data('username')       var userstatus = button.data('active')       var userid = button.data('id')       alert(userid)       var actionupdate = "{{action('usercontroller@update', "+userid+")}}"        alert(actionupdate) 

and result/alert userid 28723050-71e9-11e7-a0a9-e9f620359699 (uuid user id) when concated/joined, got actionupdate variable {{action('usercontroller@update', "userid")}} instead of {{action('usercontroller@update', "28723050-71e9-11e7-a0a9-e9f620359699")}} expected.

i tried join string , variable concat or +=, didn't result expected.

any alternatives , solution appreciated.

if, odd reason, want

{{action('usercontroller@update', "28723050-...9699")}}

with single-quotes around usercontroller@update , double-quotes around userid, think need

  var userid = button.data('id')   alert(userid)   var actionupdate = "{{action('usercontroller@update', \""+userid+"\")}}"    alert(actionupdate) 

(i.e., need add escaped double-quote character on either side of concatenation part.)