This is a Polymer 3 conversion of the paper-expansion-panel element from Collaborne (https://github.com/Collaborne/paper-expansion-panel) with some minor adjustments. The readme was not updated and is still the one from the original paper-expansion-panel element!

paper-expansion-panel

paper-expansion-panel provides a A Material Design expansion panel with header and collapsible content. The web component is built with Polymer.

To use this element:

bower install paper-expansion-panel

<paper-expansion-panel header="Item 1 (no summary)" opened>
    Lots of very interesting content.
</paper-expansion-panel>

License

This software is licensed under the Apache 2 license, quoted below.

Copyright 2011-2015 Collaborne B.V. <http://github.com/Collaborne/>

Licensed under the Apache License, Version 2.0 (the "License"); you may not
use this file except in compliance with the License. You may obtain a copy of
the License at

    http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
License for the specific language governing permissions and limitations under
the License.