iron-dropdown - Vaadin Add-on Directory
An unstyled element that works similarly to a native browser select[![Published on NPM](https://img.shields.io/npm/v/@polymer/iron-dropdown.svg)](https://www.npmjs.com/package/@polymer/iron-dropdown)
[![Build status](https://travis-ci.org/PolymerElements/iron-dropdown.svg?branch=master)](https://travis-ci.org/PolymerElements/iron-dropdown)
[![Published on webcomponents.org](https://img.shields.io/badge/webcomponents.org-published-blue.svg)](https://webcomponents.org/element/@polymer/iron-dropdown)
## <iron-dropdown>
`` displays content inside a fixed-position container,
positioned relative to another element.
See: [Documentation](https://www.webcomponents.org/element/@polymer/iron-dropdown),
[Demo](https://www.webcomponents.org/element/@polymer/iron-dropdown/demo/demo/index.html).
## Usage
### Installation
```
npm install --save @polymer/iron-dropdown
```
### In an HTML file
```html
```
### In a Polymer 3 element
```js
import {PolymerElement, html} from '@polymer/polymer';
import '@polymer/iron-dropdown/iron-dropdown.js';
class SampleElement extends PolymerElement {
static get template() {
return html`
`;
}
_openDropdown() {
this.$.dropdown.open();
}
}
customElements.define('sample-element', SampleElement);
```
In the above example, the `
Hello!
Hello!
` assigned to the `dropdown-content` slot will
be hidden until the dropdown element has `opened` set to true, or when the
`open` method is called on the element.
## Contributing
If you want to send a PR to this element, here are the instructions for running
the tests and demo locally:
### Installation
```sh
git clone https://github.com/PolymerElements/iron-dropdown
cd iron-dropdown
npm install
npm install -g polymer-cli
```
### Running the demo locally
```sh
polymer serve --npm
open http://127.0.0.1:/demo/
```
### Running the tests
```sh
polymer test --npm
```