JSFiddle - React, Tailwind, and code Playground
by Agostino Pesapane
HTML
<form>
<select class="form-control" id="follower_id" name="event[task_followers_attributes][0][follower_id]">
<option value=""></option>
<option data-typeahead-associated-id="1" value="1" selected>Administrator</option>
<option data-typeahead-associated-id="2" value="2" >Marketing Guy</option>
</select>
<input type="hidden" data-typeahead-associated-id="2" name="event[followers_attributes][1][id]" value="2">
</form>
<div id="result">
</div>
</div>
</div>
JavaScript
var elements = $('form').find('[data-typeahead-associated-id]');
var result = elements.filter(":selected, :checked, :input");
$.each(result, function(index, value){
$('#result').append("<p>Index: " + index + " | Element: " + value + " | Value: " + $(value).val() +"</p>");
});