JSFiddle - React, Tailwind, and code Playground

HTML

<body>

<p>Press a key on the keyboard in the input field to find out if the Ctrl-SHIFT key was pressed or not.</p>

<input id="ctrl_shift_s" type="text" onkeydown="isKeyPressed(event)">

<p id="demo"></p>

<script>
function isKeyPressed(event) {
    console.log( event.keyCode);
    var x = document.getElementById("demo");
    if (event.shiftKey && event.ctrlKey && event.keyCode == 83 ) {
        x.innerHTML = "The Ctrl-SHIFT-S keys were pressed!";
    } else {
        x.innerHTML = "Please press Ctrl-SHIFT-S";
    }
}
</script>

</body>