Textarea autoresize

by lovromar

HTML

<textarea></textarea>

CSS

textarea {
    overflow: hidden;
}

JavaScript

te = document.querySelector('textarea');
te.addEventListener('keyup', resizeTextarea);

function resizeTextarea(ev) {
    this.style.height = '24px';
    this.style.height = this.scrollHeight + 12 + 'px';
}