JSPM – @polymer/iron-meta@3.0.1

Package Exports

@polymer/iron-meta
@polymer/iron-meta/iron-meta
@polymer/iron-meta/iron-meta.js

This package does not declare an exports field, so the exports above have been automatically detected and optimized by JSPM instead. If any package subpath is missing, it is recommended to post an issue to the original package (@polymer/iron-meta) to support the "exports" field. If that is not possible, create a JSPM override to customize the exports field for this package.

Readme

<iron-meta>

iron-meta is a generic element you can use for sharing information across the DOM tree.

See: Documentation, Demo.

Usage

Installation

npm install --save @polymer/iron-meta

In an HTML file

<html>
  <head>
    <script type="module">
      import '@polymer/iron-meta/iron-meta.js';
    </script>
  </head>
  <body>
    <iron-meta key="info" value="foo"></iron-meta>
    <!-- Other elements reading from the key 'info' see the value 'foo'. -->
  </body>
</html>

In a Polymer 3 element

import {PolymerElement} from '@polymer/polymer/polymer-element.js';
import {html} from '@polymer/polymer/lib/utils/html-tag.js';

import '@polymer/iron-meta/iron-meta.js';

class ExampleElement extends PolymerElement {
  static get properties() {
    return {
      prop: String,
    };
  }

  static get template() {
    return html`
      <iron-meta key="info" value="{{prop}}"></iron-meta>
      info: [[prop]]
    `;
  }
}

customElements.define('example-element', ExampleElement);

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-meta
cd iron-meta
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