JSFiddle - React, Tailwind, and code Playground

HTML

<input type="checkbox" checked="checked" id="myCheckbox" />
<input type="button" value="toogle checked" id="tc" />

JavaScript

n$('#tc').click(function() {
    if ( $('#myCheckbox').attr('checked')) {
        $('#myCheckbox').attr('checked', false);
    } else {
        $('#myCheckbox').attr('checked', 'checked');
    }
});