AutoGrow Textareas with CSS

By  on  

As the demands of the web change and developers experiment with different user experiences, the need for more native language improvements expands. Our presentation layer, CSS, has done incredibly well in improving capabilities, even if sometimes too slow. The need for native support for automatically expanding textarea elements has been long known...and it's finally here!

To allow textarea elements to grow vertically and horizontally, add the field-sizing property with a value of content:

textarea {
  field-sizing: content; // default is `fixed`
}

The default value for field-sizing is fixed, signaling current behavior. The new behavior, content, will expand as much as possible. To constrain the size a textarea can grow, use traditional width/max-width and height/max-height properties.

Recent Features

  • By
    CSS @supports

    Feature detection via JavaScript is a client side best practice and for all the right reasons, but unfortunately that same functionality hasn't been available within CSS.  What we end up doing is repeating the same properties multiple times with each browser prefix.  Yuck.  Another thing we...

  • By
    5 HTML5 APIs You Didn’t Know Existed

    When you say or read "HTML5", you half expect exotic dancers and unicorns to walk into the room to the tune of "I'm Sexy and I Know It."  Can you blame us though?  We watched the fundamental APIs stagnate for so long that a basic feature...

Incredible Demos

  • By
    MooTools Equal Heights Plugin:  Equalizer

    Keeping equal heights between elements within the same container can be hugely important for the sake of a pretty page. Unfortunately sometimes keeping columns the same height can't be done with CSS -- you need a little help from your JavaScript friends. Well...now you're...

  • By
    Send Email Notifications for Broken Images Using jQuery AJAX

    It's usually best to repair broken image paths as soon as possible because they can damage a website's credibility. And even worse is having a user tell you about it. Using jQuery and PHP, you can have your page automatically notify you of broken...

Discussion

  1. Michael

    Sorry for asking, but is field-sizing: content; really finally there? At least on my Mac with Google Chrome 120.0.6099.129 in the DevTools it says “unkown property name”, same goes for Safari 16.2 (18614.3.7.1.5) and Firefox 112.0.2 (64-Bit).
    thanks Michael

  2. CSS working ⚒

  3. As of January 2024, this doesn’t work yet in any stable browser.

    Looking at the Chrome status for this feature, it appears that it won’t ship until Chrome 122. (At the time of this writing, latest Chrome is 120.)

    The web standards explainer doc for this gives more details.

  4. I needed to test with Ionic and it works perfectly post chrome 123. Works on android web view as well

Wrap your code in <pre class="{language}"></pre> tags, link to a GitHub gist, JSFiddle fiddle, or CodePen pen to embed!