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iron-dropdown

An unstyled element that works similarly to a native browser select

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Published on NPM Build status Published on webcomponents.org

<iron-dropdown>

<iron-dropdown> displays content inside a fixed-position container, positioned relative to another element.

See: Documentation, Demo.

Usage

Installation

npm install --save @polymer/iron-dropdown

In an HTML file

<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

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

git clone https://github.com/PolymerElements/iron-dropdown
cd iron-dropdown
npm install
npm install -g polymer-cli

Running the demo locally

polymer serve --npm
open http://127.0.0.1:<port>/demo/

Running the tests

polymer test --npm

Compatibility

(Loading compatibility data...)

Last updated: 2017-10-27

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Version

Dependencies

  • @polymer/polymer#^3.0.0
  • @polymer/iron-behaviors#^3.0.0-pre.26
  • @polymer/iron-overlay-behavior#^3.0.0-pre.27
  • @polymer/neon-animation#^3.0.0-pre.26
Released
2018-09-14
Maturity
IMPORTED
License
BSD 3-clause "New" or "Revised" License

Compatibility

Framework
Polymer 1.0+
Polymer 3.0+
Polymer 2.0+ in 2.2.1
Browser
Browser Independent

iron-dropdown - Vaadin Add-on Directory

An unstyled element that works similarly to a native browser select iron-dropdown - Vaadin Add-on Directory
[![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
Hello!
``` ### 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`
Hello!
 `; } _openDropdown() { this.$.dropdown.open(); } } customElements.define('sample-element', SampleElement); ``` In the above example, the `
` 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 ```
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