JSFiddle - React, Tailwind, and code Playground

HTML

<form>
    Checkbox 1: <input type="checkbox" value="1" name="items[test1]" id="items_test1">
    <br>
    Checkbox 2: <input type="checkbox" value="1" name="items[test2]" id="items_test2">
        
    <br>
    <input type='submit' value='Submit' />
</form>

JavaScript

$(document).ready(function() {
    $(document).on('submit', 'form', function() {
        if($('#items_test1').is(':checked') || $('#items_test2').is(':checked')) {
             alert('done. valid form submission.');   
        } else {
             alert('invalid form submission, check atleast one checkbox.');   
        }
        return false; 
    });
})