How to use autocomplete with form-inline and a submit button

<form class="form-inline">

<div class="md-form mr-3">
<input type="search" id="form-autocomplete" class="form-control mdb-autocomplete">
<button class="mdb-autocomplete-clear">
<svg fill="#000000" height="24" viewBox="0 0 24 24" width="24" xmlns="https://www.w3.org/2000/svg">
<path d="M19 6.41L17.59 5 12 10.59 6.41 5 5 6.41 10.59 12 5 17.59 6.41 19 12 13.41 17.59 19 19 17.59 13.41 12z" />
<path d="M0 0h24v24H0z" fill="none" />
</svg>
</button>
<label for="form-autocomplete" class="active">What is your favorite US state?</label>
</div>

<button type="submit" class="btn btn-primary btn-md mb-2"><i class="fa fa-search"></i></button>

</form>

var states = [
"Alabama",
"Alaska",
"Arizona",
"Arkansas",
"California",
"Colorado",
"Connecticut",
"Delaware",
"Florida",
"Georgia",
"Hawaii",
"Idaho",
"Illnois",
"Indiana",
"Iowa",
"Kansas",
"Kentucky",
"Louisiana",
"Maine",
"Maryland",
"Massachusetts",
"Michigan",
"Minnesota",
"Mississippi",
"Missouri",
"Montana",
"Nebraska",
"Nevada",
"New Hampshire",
"New Jersey",
"New Mexico",
"New York",
"North Carolina",
"North Dakota",
"Ohio",
"Oklahoma",
"Oregon",
"Pennsylvania",
"Rhode Island",
"South Carolina",
"South Dakota",
"Tennessee",
"Texas",
"Utah",
"Vermont",
"Virginia",
"Washington",
"West Virginia",
"Wisconsin",
"Wyoming"
];

$('#form-autocomplete').mdb_autocomplete({
data: states
});

<div class="row">
<div class="col-md-6 offset-md-3">
<div class="d-flex justify-content-center">div>
/** search form **/
</div>
</div>
</div>