Answers for "textarea height control with content js"

textarea only one line

textarea {
  resize: none;
  white-space: nowrap;
  overflow-x: scroll; /* or hidden */
}

html textarea auto height to amount of text

$('textarea').each(function () {
  this.setAttribute('style', 'height:' + (this.scrollHeight) + 'px;overflow-y:hidden;');
}).on('input', function () {
  this.style.height = 'auto';
  this.style.height = (this.scrollHeight) + 'px';
});