How To Create An Auto-growing Textarea With AngularJS, JQuery, Or Plain Javascript

Posted by Weston Ganger on October 13, 2016

Autogrowing textarea tags are super handy to make your forms more readable. Its super easy to do this. Here I will show how to set this up with plain javascript, jQuery, and AngularJS


var resize = function(element){ = element.scrollHeight + "px";

$("textarea").on("keyup keydown", function(){

Plain Javascript:

var resize = function(element){ = element.scrollHeight + "px";

# For a single element
var element = document.getElementById("my-textarea");
element.addEventListener("keyup", resize(element), false);
element.addEventListener("keydown", resize(element), false);

# For all textareas
elements = document.getElementsByTagName('textarea');
for (var i = 0; i < elements.length; i++) {
  elements[i].addEventListener("keyup", resize(elements[i]), false);
  elements[i].addEventListener("keydown", resize(elements[i]), false);


<textarea id="txtnotes" ng-keyup="resize($event)" ng-keydown="resize($event)">

.controller("MyCtrl", function($scope){
  $scope.resize = function($event){
    $ = $ + "px";

Related External Links:

Posted in Javascript and Tagged with autogrow textarea 

Want me to help develop your next project or application?

Contact Us

Specializing in Ruby-on-Rails, Javascript, Multi-Platform Electron Desktop Apps and Hybrid Cordova Mobile Apps.

Recommended Posts