nebula-alert | Vaadin

An alert dialog.

[ This description is mirrored from at on 2019-05-10 ]

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A customizable alert dialog.

  • A full-screen overlay with backdrop and centered dialog
  • Supports optional title, icon, text and buttons
  • Supports WAI-ARIA for a11y


$ bower install -S arsnebula/nebula-alert

Getting Started

Import the package.

<link rel="import" href="/bower_components/nebula-loader/nebula-alert.html">

Add the element.

  text="You have been warned."

You can also easily create and display the element programatically using the show method. The element is appended and removed from the document.body automatically.

// create the element
const alert = document.createElement('nebula-alert')

// update any styles
  '--nebula-alert-color': 'white',
  '--nebula-alert-background-color': 'black',
  '--nebula-alert-border-color': 'silver',

// show the element - automatically appended to document.body{
  title: 'Alert',
  icon: 'icons:warning',
  text: 'You have been warned',
  buttons: ['OK']
}).then(function(result) {
  console.log('The alert has been closed', result)

For more information, see the API documentation.


We welcome and appreciate feedback from the community. Here are a few ways that you can show your appreciation for this package:

  • Give us a Star on GitHub from either or directly on GitHub.

  • Submit a feature request, or a defect report on the Issues List.

  • Become a Patreon. It takes a lot of time and effort to develop, document, test and support the elements in our Nebula Essentials collection. Your financial contribution will help ensure that our entire collection continues to grow and improve.

If you are a developer, and are interested in making a code contribution, consider opening an issue first to describe the change, and discuss with the core repository maintainers. Once you are ready, prepare a pull request:

  1. Fork it!
  2. Create your feature branch: git checkout -b my-new-feature
  3. Commit your changes: git commit -am 'Add some feature'
  4. Push to the branch: git push origin my-new-feature
  5. Submit a pull request :D

Change Log





Link to this version
ImportedReleased 23 May 2017ISC License
Framework Support
Polymer 2.0+
Also supported:
Polymer 1 (2.0.0)
Browser Compatibility
Install with
bower install --save arsnebula/nebula-alert"#2.1.0"
Run the above Bower command in your project folder. If you have any issues installing, please contact the author.
Release notes - Version 2.1.0


  • polymer#Polymer/polymer#^2.0.0
  • nebula-element-mixin#arsnebula/nebula-element-mixin#^2.0.0
  • nebula-icons#arsnebula/nebula-icons#^2.0.0
  • nebula-button#arsnebula/nebula-button#^2.0.0
  • nebula-dialog#arsnebula/nebula-dialog#^2.0.0
  • nebula-appbar-layout#arsnebula/nebula-appbar-layout#^2.0.0