JSFiddle - React, Tailwind, and code Playground

HTML

<input type="checkbox" id="chk" value="value" name="test" />
<label for="chk">Value </label>
<br/>
<input type="button" id="But1" value="change value (working)" />

JavaScript

$('#But1').click(function () {
            checkit('Before');
            var current = $('#chk').is(':checked')
         	  $('#chk').prop({'checked': !current});
            checkit('After');
        });

        $('#chk').on( 'change',function () {
            checkit('Result');
        });
        function checkit(moment) {
            var chk1 = $('#chk').is(':checked');
            console.log(moment+", value = " + chk1);
        };