<textarea id="textarea"></textarea>
<script src="include.js"></script>
<script type="text/javascript">
    test(() => {
        let textarea = document.getElementById("textarea");
        textarea.focus();

        println(`selectionStart: ${textarea.selectionStart}`);
        println(`selectionEnd: ${textarea.selectionEnd}`);

        textarea.value = "Well hello friends";
        println(`selectionStart: ${textarea.selectionStart}`);
        println(`selectionEnd: ${textarea.selectionEnd}`);
    });
</script>