display all textarea rows without scrolling [duplicate]

Question

How can I display all textarea rows instead of having that vertical scroll. I have tried with css using min-height and max-height and height: auto but is not working.

.form-control{
    width:400px;
    min-height: 100px;
    max-height: 900px;
    height: auto;}

I don't really know if is possible to do that with css.

Maybe is possible with native javascript so I am trying something like this

function expandtext(expand) {
    while (expand.rows > 1 && expand.scrollHeight < expand.offsetHeight) {
        console.log("display all rows!")>
    }
}

I find something nice here but it only increase and decrease rows , so how can I display all textarea rows without using scroll. DON'T NEED SOLUTION WITH FIXED HEIGHT, NEED SOMETHING DYNAMIC or other solutions that works only on chrome browser or only on firefox like Object.observe().

Demo

function expandtext(expand) {
  while (expand.rows > 1 && expand.scrollHeight < expand.offsetHeight) {
    console.log("display all rows!") >
  }
}

body {
  padding: 20px;
}
.form-control {
  width: 400px;
  min-height: 100px;
  max-height: 900px;
  height: auto;
}

<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.2/js/bootstrap.min.js"></script>
<link href="http://maxcdn.bootstrapcdn.com/font-awesome/4.2.0/css/font-awesome.min.css" rel="stylesheet"/>
<link href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.2/css/bootstrap.min.css" rel="stylesheet"/>

<div class=" form-group">
  <label>remove texarea scroll and display all rows</label>
  <textarea class="form-control" rows="4" onkeydown="expandtext(this);">Lorem ipsum dolor sit amet, consectetur adipiscing elit. Quisque suscipit, nisl eget dapibus condimentum, ipsum felis condimentum nisi, eget luctus est tortor vitae nunc. Nam ornare dictum augue, non bibendum sapien pulvinar ut. Vestibulum ante ipsum
    primis in faucibus orci luctus et ultrices posuere cubilia Curae; Cras congue congue purus, quis imperdiet tellus ornare in. Nulla facilisi. Nulla elementum posuere odio ut ultricies. Nullam tempus tincidunt elit eget posuere. Pellentesque sit amet
    tellus sapien. Praesent sed iaculis turpis. Nam quis nibh diam, sed mattis orci. Nullam ornare adipiscing congue. In est orci, consectetur in feugiat non, consequat vitae dui. Mauris varius dui a dolor convallis iaculis.</textarea>
</div>
<div class=" form-group">
  <label>remove texarea scroll and display all rows</label>
  <textarea class="form-control" rows="4" onkeydown="expandtext(this);">Lorem ipsum dolor sit amet, consectetur adipiscing elit. Quisque suscipit, nisl eget dapibus condimentum, ipsum felis condimentum nisi, eget luctus est tortor vitae nunc. Nam ornare dictum augue, non bibendum sapien pulvinar ut.</textarea>
</div>

External JSFiddle.

Answer 1

No Javascript required.

You can display a no-scroll (ie. automatically re-sizing) editable text area with the following HTML and CSS:

.textarea {
  width:250px;
  min-height:50px;
  height:auto;
  border:2px solid rgba(63,63,63,1);
}

<div class="textarea" contenteditable="true">

Answer 2

Simple jQuery solution is:

$(function() {
    $('textarea').each(function() {
        $(this).height($(this).prop('scrollHeight'));
    });
});

Check Fiddle.

As you need a plain JavaScript solution, use following script that was created by User panzi. You can view the original answer here.

var observe;
if (window.attachEvent) {
    observe = function (element, event, handler) {
        element.attachEvent('on'+event, handler);
    };
}
else {
    observe = function (element, event, handler) {
        element.addEventListener(event, handler, false);
    };
}
function init () {
    var text = document.getElementById('textarea');
    function resize () {
        text.style.height = 'auto';
        text.style.height = text.scrollHeight+'px';
    }
    /* 0-timeout to get the already changed text */
    function delayedResize () {
        window.setTimeout(resize, 0);
    }
    observe(text, 'change',  resize);
    observe(text, 'cut',     delayedResize);
    observe(text, 'paste',   delayedResize);
    observe(text, 'drop',    delayedResize);
    observe(text, 'keydown', delayedResize);

    text.focus();
    text.select();
    resize();
}

Check Fiddle Here.