JSFiddle - React, Tailwind, and code Playground

HTML

<div class='controls'>
    <label class="checkbox">
        <input type="checkbox" name="my_match[]" value="190">TEST 190</label>
    <label class="checkbox">
        <input type="checkbox" name="my_match[]" value="200">TEST 200</label>
    <label class="checkbox">
        <input type="checkbox" name="my_match[]" value="210">TEST 210</label>
</div>

<form>
    <input id='my_match' type='hidden' name='my_match[]' />
    <button>Submit</button>
</form>

JavaScript

$('form').submit(function() {
    var arr=[];
    
    $('input:checked[name=my_match[]]').each(function(){
        arr.push($(this).val());
    });
             


    // Prevent actual submit for demo purposes:
    return false;
});