右クリックから貼り付けても文字数がカウントされる
characters left
<textarea id="comment"></textarea> <p><span id="label"></span> characters left</p>
var comment = document.getElementById('comment'); var label = document.getElementById('label'); var LIMIT = 20; label.innerHTML = LIMIT; comment.addEventListener('input', function() { var remaining = LIMIT - this.value.length; label.innerHTML = remaining; });