# @polymer/iron-dropdown

> An unstyled element that works similarly to a native browser select

Latest version **3.0.1** (published 2018-09-14) · BSD-3-Clause license · 0 weekly downloads

## Install

```sh
npm install @polymer/iron-dropdown
pnpm add @polymer/iron-dropdown
yarn add @polymer/iron-dropdown
bun add @polymer/iron-dropdown
```

## Health

**Score 15/100 (F)** — status: abandoned.

Positive: no vulnerabilities.

Warnings: low downloads; no types; no esm support.

Negative: abandoned; low maintenance score.

## Facts

| | |
|---|---|
| Version | 3.0.1 |
| Published | 2018-09-14 |
| First published | 2016-02-02 |
| Weekly downloads | 0 |
| License | BSD-3-Clause |
| TypeScript types | none |
| Module format | CommonJS |
| Dependencies | 4 |
| Unpacked size | 47.9 KB |
| Known vulnerabilities | 0 |
| Install scripts | no |
| GitHub stars | 34 |
| Author | The Polymer Authors |
| Maintainers | aomarks, azakus, bicknellr, emarquez, justinfagnani, keanulee, notwaldorf, polymer-devs, samli, sorvell, usergenic |
| Keywords | web-components, web-component, polymer |

## Links

- npm: https://www.npmjs.com/package/@polymer/iron-dropdown
- Repository: https://github.com/PolymerElements/iron-dropdown
- Issues: https://github.com/PolymerElements/iron-dropdown/issues
- npm.io page: https://npm.io/package/@polymer/iron-dropdown

## Dependencies (4)

- [@polymer/polymer](https://npm.io/package/@polymer/polymer.md) ^3.0.0
- [@polymer/iron-behaviors](https://npm.io/package/@polymer/iron-behaviors.md) ^3.0.0-pre.26
- [@polymer/neon-animation](https://npm.io/package/@polymer/neon-animation.md) ^3.0.0-pre.26
- [@polymer/iron-overlay-behavior](https://npm.io/package/@polymer/iron-overlay-behavior.md) ^3.0.0-pre.27

## Recent versions

- 3.0.1 (latest) — 2018-09-14
- 3.0.0-pre.20 (next) — 2018-06-23
- 1.5.5-pre.3 (preview) — 2017-01-24
- 3.0.0 — 2018-09-13
- 3.0.0-pre.26 — 2018-09-12
- 3.0.0-pre.25 — 2018-08-29
- 3.0.0-pre.24 — 2018-08-29
- 3.0.0-pre.23 — 2018-08-25
- 3.0.0-pre.22 — 2018-08-25
- 3.0.0-pre.21 — 2018-06-23
- 3.0.0-pre.19 — 2018-05-09
- 3.0.0-pre.18 — 2018-05-09
- 3.0.0-pre.17 — 2018-05-08
- 3.0.0-pre.16 — 2018-05-04
- 3.0.0-pre.15 — 2018-05-02
- … 17 more at https://npm.io/package/@polymer/iron-dropdown/versions

## README

[![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>

`<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
<html>
  <head>
    <script type="module">
      import '@polymer/iron-dropdown/iron-dropdown.js';
    </script>
    <style>
      #container {
        display: inline-block;
      }

      iron-dropdown {
        border: 1px solid gray;
        background: white;
        font-size: 2em;
      }
    </style>
  </head>
  <body>
    <div id="container">
      <button onclick="dropdown.open();">open the iron-dropdown</button>
      <iron-dropdown id="dropdown" no-overlap>
        <div slot="dropdown-content">Hello!</div>
      </iron-dropdown>
    </div>
  </body>
</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`
      <style>
        :host {
          display: inline-block;
        }

        iron-dropdown {
          border: 1px solid gray;
          background: white;
          font-size: 2em;
        }
      </style>
      <button on-click="_openDropdown">open the dropdown</button>
      <iron-dropdown id="dropdown" horizontal-align="right" vertical-align="top">
        <div slot="dropdown-content">Hello!</div>
      </iron-dropdown>
    `;
  }

  _openDropdown() {
    this.$.dropdown.open();
  }
}
customElements.define('sample-element', SampleElement);
```

In the above example, the `<div>` 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:<port>/demo/
```

### Running the tests

```sh
polymer test --npm
```

---
_Source: https://npm.io/package/@polymer/iron-dropdown · Machine-readable twin of the npm.io package page. Health data is recomputed on every publish._