<body>
<div id="main" contenteditable="true"></div>
<script type="text/javascript">
$('#main').on('DOMSubtreeModified', function(){
$('#main > div').children().unwrap();
});
</script>
</body>document.execCommand("defaultParagraphSeparator", false, "p");const sessions = ['session 1', 'session 2', 'session 3']
const searchTarget = document.querySelector('.target');
const submitButton = document.querySelector('.submit')
if (searchTarget.textContent.includes('session')) {
if (!sessions.every((session) => searchTarget.textContent.includes(session))) {
submitButton.setAttribute("disabled", "")
} else {
submitButton.removeAttribute('disabled')
}
}<script src="https://code.jquery.com/jquery-3.6.0.js" integrity="sha256-H+K7U5CnXl1h5ywQfKtSj8PCmoN9aaq30gDh27Xc0jk=" crossorigin="anonymous"></script>document.execCommand("defaultParagraphSeparator", false, "br");<div class="target">session 1</div>
<button class="submit">test</button>