JSFiddle - React, Tailwind, and code Playground

HTML

<form id="formId" name="formName" action="index.php" method="post">
<input name=entry>
<input type="checkbox" class="checkbox1">1
<input type="checkbox" class="checkbox2">2
<input type="checkbox" onclick="this.form.submit();">5
<input id="submitme" type="submit" name="submit" >
</form>

JavaScript

$(function(){ 
    $(".checkbox1").click(
        function(){ 
            alert('checkbox 1 clicked'); 
        }
    )
    $(".checkbox2").click(
        function(){ 
            $('#submitme').trigger('click');
        }
    )
});