The Web Component for expandable details. Part of the Vaadin components.


<vaadin-details> is a Web Component providing functionality for expandable details, part of the Vaadin components.

Live Demo ↗ | API documentation ↗

npm version Bower version Published on Build Status Coverage Status Gitter Published on Vaadin Directory Stars on

<vaadin-details opened>
  <div slot="summary">Expandable Details</div>
  Toggle using mouse, Enter and Space keys.

Screenshot of vaadin-details


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-details:

bower i vaadin/vaadin-details --save

Once installed, import it in your application:

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

Polymer 3 and ES Modules compatible version

Install vaadin-details:

npm i @vaadin/vaadin-details --save

Once installed, import it in your application:

import '@vaadin/vaadin-details/vaadin-details.js';

Getting started

Vaadin components use the Lumo theme by default.

To use the Material theme, import the correspondent file from the theme/material folder.

Entry points

  • The component with the Lumo theme:


  • The component with the Material theme:


  • Alias for theme/lumo/vaadin-details.html:


Running demos and tests in a browser

  1. Fork the vaadin-details repository and clone it locally.

  2. Make sure you have npm and Bower installed.

  3. When in the vaadin-details 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 npm start, 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-details directory, run polymer test

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.

Big Thanks

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


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


Apache License 2.0

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Link to this version
ImportedReleased 14 February 2019Apache License 2.0
Framework Support
Polymer 3.0+
Browser Independent
Install with
npm install @vaadin/vaadin-details"@1.0.1"
Run the above npm command in your project folder. If you have any issues installing, please contact the author.
Release notes - Version 1.0.1


  • @polymer/polymer#^3.0.0
  • @vaadin/vaadin-themable-mixin#^1.2.0
  • @vaadin/vaadin-element-mixin#^2.0.0
  • @vaadin/vaadin-control-state-mixin#^2.1.0
  • @vaadin/vaadin-lumo-styles#^1.4.1
  • @vaadin/vaadin-material-styles#^1.2.0