iron-behaviors | Vaadin

Behaviors that manage control states like 'focused', 'disabled', and 'active'

Published on NPM Build status Published on


<iron-behaviors> provides a set of behaviors for the iron elements.

See: Documentation, Demo.



npm install --save @polymer/iron-behaviors

In a Polymer 3 element

import {PolymerElement, html} from '@polymer/polymer';
import {mixinBehaviors} from '@polymer/polymer/lib/legacy/class.js';
import {IronButtonState} from '../iron-button-state.js';
import {IronControlState} from '../iron-control-state.js';

class SampleElement extends mixinBehaviors([IronButtonState, IronControlState], PolymerElement) {
  static get template() {
    return html`
        :host {
          display: inline-block;

        :host([disabled]) {
          opacity: 0.3;
          pointer-events: none;

        :host([pressed]) {
          background-color: blue;

        :host([focused]) {
          background-color: cornflowerblue;
customElements.define('sample-element', SampleElement);


If you want to send a PR to this element, here are the instructions for running the tests and demo locally:


git clone
cd iron-behaviors
npm install
npm install -g polymer-cli

Running the demo locally

polymer serve --npm

Running the tests

polymer test --npm


Link to this version
ImportedReleased 14 September 2018BSD 3-clause "New" or "Revised" License
Framework Support
Polymer 1.0+
Polymer 3.0+
Also supported:
Polymer 2 (2.1.1)
Browser Compatibility
Install with
npm install @polymer/iron-behaviors"@3.0.1"
Run the above npm command in your project folder. If you have any issues installing, please contact the author.
Release notes - Version 3.0.1


  • @polymer/polymer#^3.0.0
  • @polymer/iron-a11y-keys-behavior#^3.0.0-pre.26