Javascript code is not working inside blade template Laravel

I'm using laravel-5.3. I am trying to put some code in my blade template. But it seems that the JavaScript code is not working properly. Here is my blade template.

@extends('layouts.app')
@section('scripts')

    <script type="text/javascript">
        $(document).ready(function() {
            var members = {!!  json_encode($member)  !!};
            var arr = [];
            var cities = new Bloodhound({
                datumTokenizer: Bloodhound.tokenizers.obj.whitespace('text'),
                queryTokenizer: Bloodhound.tokenizers.whitespace,
                local: members
            });
            cities.initialize();
            var elt = $('#researcher');

            elt.tagsinput({
                itemValue: 'value',
                itemText: 'text',
                allowDuplicates: false,
                interactive:true,
                typeaheadjs: {
                    name: 'cities',
                    displayKey: 'text',
                    source: cities.ttAdapter()
                }
            });
            console.log(members);
            var elt1 = $('#advisor');
            elt1.tagsinput({
                itemValue: 'value',
                itemText: 'text',
                allowDuplicates: false,
                interactive:true,
                typeaheadjs: {
                    name: 'cities',
                    displayKey: 'text',
                    source: cities.ttAdapter()
                }
            });

            $("#submit").click(function(event){
                $.ajax({
                    type: "POST",
                    url: '/storeresearch',
                    data: { _token: ""},
                    success: function( msg ) {
                        console.log(msg);
                        window.location.replace('/researches');
                    }
                });
            });

        });
    </script>
@endsection

@section('content')
    <form id="hu" action="/storeresearch" method="POST">
        {!! csrf_field() !!}
        <label>Researcher</label>
        <input type="text" class="R_a" id="researcher" name="researchsupervisor_1">
        <label>Advisor</label>
        <input type="text" class="R_a" id="advisor" name="researchsupervisor_1">
        <input type="button" name="submit" id="submit" class="btn btn-primary" value="Add">
    </form>
@endsection

The tagsinput is not working. what should i do. If I do this without extending any layouts it works fine. In the app layout i have yield the scripts section in the header part.

via Chebli Mohamed