ember-window-messenger

ember-window-messenger

This Ember addon is a lightweight postMessage client/server implementation. It is built on promises so the fetch and rpc methods can used directly in your route model() hooks.

For changelog see CHANGELOG.md

It supports JSON only messages for now

Usage

ember install ember-window-messenger

Configuration

Add target:origin map to your config/environment.js. This effectively defines which targets (windows, frames) is your app communicating with.

APP: {
  // Here you can pass flags/options to your application instance
  // when it is created
  'ember-window-messenger': {
    'parent': 'http://localhost:4200',
    'target-1': 'http://localhost:4200',
    'target-2': 'http://localhost:4200',
    'popup': 'http://localhost:4200'
  }
}

This list is also used for validation, to check if message comes from an allowed origin.

Examples

If you dare, fire up the dummy app in this addon and test it out. Below are the basic examples, see dummy app for more.

Setup server on parent

import Ember from 'ember';

export default Ember.Route.extend({
  server: Ember.inject.service('window-messenger-server'),

  init() {
    this._super(...arguments);

    this.get('server').on('demo-data', (resolve, reject, query) => {
      resolve('Some data');
    });
  }
});

Fetch from parent

import Ember from 'ember';

export default Ember.Route.extend({
  client: Ember.inject.service('window-messenger-client'),

  model() {
    return this.get('client').fetch('demo-data');
  }
});

Fetch from a specific target

This can be used from parent window to frames/tabs communication.

import Ember from 'ember';

export default Ember.Route.extend({
  client: Ember.inject.service('window-messenger-client'),

  model() {
    return this.get('client').fetch('popup:demo-data');
  }
});

Execute RPC call

Internally it is the same as fetch, but provides semantic sugar to your app code.

import Ember from 'ember';

export default Ember.Route.extend({
  client: Ember.inject.service('window-messenger-client'),

  actions {
    runMe() {
      this.get('client').rpc('start-worker').then((response) => {
        // handle response here
      });
    }
  }
});

iFrames, popup windows

If you want to communicate with an iframe or a popup window opened with window.open, then you have to register your window instance on the client with matching target name from config/environment map.

iFrame

// app/components/x-frame.js
import Ember from 'ember';

export default Ember.Component.extend({
  client: Ember.inject.service('window-messenger-client'),

  didInsertElement() {
    this.get('client').addTarget('target-1', this.$().get(0).contentWindow);
  },

  willDestroyElement() {
    this.get('client').removeTarget('target-1');
  }
});

Popup with window.open

// app/routes/my-route.js
import Ember from 'ember';

export default Ember.Route.extend({
  client: Ember.inject.service('window-messenger-client'),

  actions: {
    openPopup() {
      let win = window.open('/some/path', 'Example popup', 'toolbar=no,resizable=no,width=400,height=400');
      this.get('client').addTarget('popup', win);
    },

    fetchFromPopup() {
      this.get('client').fetch('popup:some-data').then((name) => {
        this.controller.set('model', name);
      });
    }
  }
});

Open popup if it isn't already open, or has been closed by the user

// app/routes/my-route.js
import Ember from 'ember';

export default Ember.Route.extend({
  client: Ember.inject.service('window-messenger-client'),

  actions: {
    openPopup() {
      if (!this.get('client').hasTarget('popup')) {
        let win = window.open('/some/path', 'Example popup', 'toolbar=no,resizable=no,width=400,height=400');
        this.get('client').addTarget('popup', win);
      }
    },
  }
});

Installation

• git clone <repository-url> this repository
• cd ember-window-messenger
• yarn install or npm install

Running

• ember serve
• Visit your app at http://localhost:4200.

Running Tests

• npm test (Runs ember try:each to test your addon against multiple Ember versions)
• ember test
• ember test --server

Building

• ember build

For more information on using ember-cli, visit https://ember-cli.com/.

Changelog

[1.0.0] - 2017-04-24

Added

• Service for dispatching messages, so only one post message event listener is registered

Changed

• Refactored tests to be more meaningful
• Upgraded to Ember-CLI 2.13.beta-4 for Babel 6 support