JSFiddle - React, Tailwind, and code Playground

HTML

<form>
    <fieldset>
    <input type='text' value='text value' />
    <select>
        <option value='some option' checked='checked'>opt</option>
        <option value='some other option' checked='checked'>other opt</option>
    </select>
    <textarea>some text</textarea>
</fieldset>
    <input type='submit' />
</form>

CSS

#id {
    position:relative;
    top:50px;
}

JavaScript

var array;

$("fieldset").change(function(event) {
    $(event.target).data('changed',true);
});

$("form").submit(function() {
    array = $(this).find("input, select,textarea").map(function() {
        var $th = $(this);
        if( $th.data('changed') ) return $(this).val();
    }).get();
    
    alert(array);
    return false;
});