JSFiddle - React, Tailwind, and code Playground

HTML

<div id="check_one">
    <label>Stuff 1</label> <input name="" type="checkbox" value="" id="group1" checked="checked"><br>
    <label>Stuff 2</label> <input name="" type="checkbox" value="" id="group1" checked="checked"><br>
    <label>Stuff 3</label> <input name="" type="checkbox" value="" id="group1" checked="checked"><br>
    <label>Stuff 4</label> <input name="" type="checkbox" value="" id="group1" checked="checked">
</div>
<br>
<div id="check_two">
    <label>Undo</label> <input name="uncheckMe" type="checkbox" value="" id="group2">
</div>

JavaScript

$(function(){
    $("input[name='uncheckMe']").change(function(){
        if ($(this).is(":checked")){      
            $("#check_one input").removeAttr("checked");
        }
    });
});