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An easy to use web component to ask the user to confirm a choice




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Live Demo ↗ | API documentation ↗

<vaadin-confirm-dialog> is a Web Component providing an easy way to ask the user to confirm a choice, part of the Vaadin components.

  <vaadin-confirm-dialog header="Unsaved changes" confirm-text="Save" on-confirm="save"
    cancel on-cancel="cancel" reject reject-text="Discard" on-reject="discard">
    Do you want to save or discard your changes before navigating away?

Screenshot of vaadin-confirm-dialog


The Vaadin components are distributed as Bower and npm packages. Please note that the version range is the same, as the API has not changed. You should not mix Bower and npm versions in the same application, though.

Unlike the official Polymer Elements, the converted Polymer 3 compatible Vaadin components are only published on npm, not pushed to GitHub repositories.

Polymer 2 and HTML Imports compatible version

Install vaadin-confirm-dialog:

bower i vaadin/vaadin-confirm-dialog --save

Once installed, import it in your application:

<link rel="import" href="bower_components/vaadin-confirm-dialog/vaadin-confirm-dialog.html">

Polymer 3 and ES Modules compatible version

Install vaadin-confirm-dialog:

npm i @vaadin/vaadin-confirm-dialog --save

Once installed, import it in your application:

import '@vaadin/vaadin-confirm-dialog/vaadin-confirm-dialog.js';

Getting Started

Vaadin components use the Lumo theme by default.

The file structure for Vaadin components

  • src/vaadin-confirm-dialog.html

    Unstyled component.

  • theme/lumo/vaadin-confirm-dialog.html

    Component with Lumo theme.

  • vaadin-confirm-dialog.html

    Alias for theme/lumo/vaadin-confirm-dialog.html

Running demos and tests in browser

  1. Fork the vaadin-confirm-dialog repository and clone it locally.

  2. Make sure you have npm installed.

  3. When in the vaadin-confirm-dialog directory, run npm install and then bower install to install dependencies.

  4. Make sure you have polymer-cli installed globally: npm i -g polymer-cli.

  5. Run polymer serve --open, browser will automatically open the component API documentation.

  6. You can also open demo or in-browser tests by adding demo or test to the URL, for example:

Running tests from the command line

  1. When in the vaadin-confirm-dialog directory, run polymer test

Big Thanks

Cross-browser Testing Platform and Open Source <3 Provided by Sauce Labs.

Following the coding style

We are using ESLint for linting JavaScript code. You can check if your code is following our standards by running gulp lint, which will automatically lint all .js files as well as JavaScript snippets inside .html files.


To contribute to the component, please read the guideline first.


Commercial Vaadin Add-on License version 3 (CVALv3). For license terms, see LICENSE.

Vaadin collects development time usage statistics to improve this product. For details and to opt-out, see


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  • @polymer/polymer#^3.0.0
  • @vaadin/vaadin-themable-mixin#^1.2.0
  • @vaadin/vaadin-element-mixin#^2.0.0
  • @vaadin/vaadin-lumo-styles#^1.1.0
  • @vaadin/vaadin-material-styles#^1.1.0
  • @vaadin/vaadin-license-checker#^2.1.0
  • @vaadin/vaadin-dialog#^2.1.0
  • @vaadin/vaadin-button#^2.1.0
  • @vaadin/vaadin-overlay#^3.2.0


Polymer 2.0+
Polymer 3.0+
Browser Independent