Simple, highly configurable flash messages for ember-cli.

This ember-cli addon adds a simple flash message service and component to your app. Just inject with Ember.inject.service and you're good to go!

ember install ember-cli-flash

This addon is tested against the release, beta and canary channels, ~1.11.0, and 1.12.1. Because this addon makes use of attribute bindings, which were introduced in ember 1.11.0, earlier versions of ember are not compatible with the latest version.

Usage is very simple. First, add one of the template examples to your app. Then, inject the flashMessages service and use one of its convenience methods:

export default Ember.Component.extend({
  flashMessages: Ember.inject.service()
})

You can quickly add flash messages using these methods from the service:

• .success
• .warning
• .info
• .danger

• .success
• .warning
• .info
• .alert
• .secondary

These will add the appropriate classes to the flash message component for styling in Bootstrap or Foundation. For example:

// Bootstrap: the flash message component will have 'alert alert-success' classes
// Foundation: the flash message component will have 'alert-box success' classes
Ember.get(this, 'flashMessages').success('Success!');

You can take advantage of Promises, and their .then and .catch methods. To add a flash message after saving a model (or when it fails):

actions: {
  saveFoo() {
    const flashMessages = Ember.get(this, 'flashMessages');

    Ember.get(this, 'model')
      .save()
      .then((res) => {
        flashMessages.success('Successfully saved!');
        doSomething(res);
      })
      .catch((err) => {
        flashMessages.danger('Something went wrong!');
        handleError(err);
      });
  }
}

If the convenience methods don't fit your needs, you can add custom messages with add:

Ember.get(this, 'flashMessages').add({
  message: 'Custom message'
});

You can also pass in options to custom messages:

Ember.get(this, 'flashMessages').add({
  message: 'I like alpacas',
  type: 'alpaca',
  timeout: 500,
  priority: 200,
  sticky: true,
  showProgress: true,
  extendedTimeout: 500,
  destroyOnClick: false
});

Ember.get(this, 'flashMessages').success('This is amazing', {
  timeout: 100,
  priority: 100,
  sticky: false,
  showProgress: true
});

• message: string

  Required. The message that the flash message displays.

• type?: string

  Default: info

  This is mainly used for styling. The flash message's type is set as a class name on the rendered component, together with a prefix. The rendered class name depends on the message type that was passed into the component.

• timeout?: number

  Default: 3000

  Number of milliseconds before a flash message is automatically removed.

• priority?: number

  Default: 100

  Higher priority messages appear before low priority messages. The best practise is to use priority values in multiples of 100 (100 being the lowest priority). Note that you will need modify your template for this work.

• sticky?: boolean

  Default: false

  By default, flash messages disappear after a certain amount of time. To disable this and make flash messages permanent (they can still be dismissed by click), set sticky to true.

• showProgress?: boolean

  Default: false

  To show a progress bar in the flash message, set this to true.

• extendedTimeout?: number

  Default: 0

  Number of milliseconds before a flash message is removed to add the class 'exiting' to the element. This can be used to animate the removal of messages with a transition.

• destroyOnClick?: boolean

  Default: true

  By default, flash messages will be destroyed on click. Disabling this can be useful if the message supports user interaction.

You can also add arbitrary options to messages:

Ember.get(this, 'flashMessages').success('Cool story bro', {
  someOption: 'hello'
});

Ember.get(this, 'flashMessages').add({
  message: 'hello',
  type: 'foo',
  componentName: 'some-component',
  content: customContent
});

This makes use of the component helper, allowing the template that ultimately renders the flash to be dynamic:

{{#each flashMessages.queue as |flash|}}
  {{#flash-message flash=flash as |component flash|}}
    {{#if flash.componentName}}
      {{component flash.componentName content=flash.content}}
    {{else}}
      <h6>{{component.flashType}}</h6>
      <p>{{flash.message}}</p>
    {{/if}}
  {{/flash-message}}
{{/each}}

It's best practise to use flash messages sparingly, only when you need to notify the user of something. If you're sending too many messages, and need a way for your users to clear all messages from screen, you can use this method:

Ember.get(this, 'flashMessages').clearMessages();

In config/environment.js, you can override service defaults in the flashMessageDefaults object:

module.exports = function(environment) {
  var ENV = {
    flashMessageDefaults: {
      // flash message defaults
      timeout: 5000,
      extendedTimeout: 0,
      priority: 200,
      sticky: true,
      showProgress: true,

      // service defaults
      type: 'alpaca',
      types: [ 'alpaca', 'notice', 'foobar' ],
      preventDuplicates: false
    }
  }
}

See the options section for information about flash message specific options.

• type?: string

  Default: info

  When adding a custom message with add, if no type is specified, this default is used.

• types?: array

  Default: [ 'success', 'info', 'warning', 'danger', 'alert', 'secondary' ]

  This option lets you specify exactly what types you need, which means in the above example, you can do Ember.get('flashMessages').{alpaca,notice,foobar}.

• preventDuplicates?: boolean

  Default: false

  If true, only 1 instance of a flash message (based on its message) can be added at a time. For example, adding two flash messages with the message "Great success!" would only add the first instance into the queue, and the second is ignored.

Then, to display somewhere in your app, add this to your template:

{{#each flashMessages.queue as |flash|}}
  {{flash-message flash=flash}}
{{/each}}

It also accepts your own template:

{{#each flashMessages.queue as |flash|}}
  {{#flash-message flash=flash as |component flash|}}
    <h6>{{component.flashType}}</h6>
    <p>{{flash.message}}</p>
    {{#if component.showProgressBar}}
      <div class="alert-progress">
        <div class="alert-progressBar" style="{{component.progressDuration}}"></div>
      </div>
    {{/if}}
  {{/flash-message}}
{{/each}}

By default, flash messages will have Bootstrap style class names. If you want to use Foundation, simply specify the messageStyle on the component:

{{#each flashMessages.queue as |flash|}}
  {{flash-message flash=flash messageStyle='foundation'}}
{{/each}}

To display messages sorted by priority, add this to your template:

{{#each flashMessages.arrangedQueue as |flash|}}
  {{flash-message flash=flash}}
{{/each}}

To add radius or round type corners in Foundation:

{{#each flashMessages.arrangedQueue as |flash|}}
  {{flash-message flash=flash messageStyle='foundation' class='radius'}}
{{/each}}

{{#each flashMessages.arrangedQueue as |flash|}}
  {{flash-message flash=flash messageStyle='foundation' class='round'}}
{{/each}}

If the provided component isn't to your liking, you can easily create your own. All you need to do is pass in the flash object to that component:

{{#each flashMessages.queue as |flash|}}
  {{custom-component flash=flash}}
{{/each}}

When you install the addon, it should automatically generate a helper located at tests/helpers/flash-message.js. You can do this manually as well:

$ ember generate ember-cli-flash

This also adds the helper to tests/test-helper.js. You won't actually need to import this into your tests, but it's good to know what the blueprint does. Basically, the helper overrides the _setInitialState method so that the flash messages behave intuitively in a testing environment.

An example acceptance test:

// tests/acceptance/foo-test.js

test('flash message is rendered', function(assert) {
  assert.expect(1);
  visit('/');

  andThen(() => assert.ok(find('.alert.alert-success')));
});

An example integration test:

// tests/integration/components/x-foo-test.js
import Ember from 'ember';

moduleForComponent('x-foo', 'Integration | Component | x foo', {
  integration: true,
  beforeEach() {
    //We have to register any types we expect to use in this component
    const typesUsed = ['info', 'warning', 'success'];
    Ember.getOwner(this).lookup('service:flash-messages').registerTypes(typesUsed);
  }
});

test('it renders', function(assert) {
  ...
});

For unit tests that require the flashMessages service, you'll need to do a small bit of setup:

moduleFor('route:foo', 'Unit | Route | foo', {
  needs: ['service:flash-messages'],
  beforeEach() {
    const typesUsed = ['warning', 'success'];
    Ember.getOwner(this).lookup('service:flash-messages').registerTypes(typesUsed);
  }
});

This addon is minimal and does not currently ship with a stylesheet. You can style flash messages by targetting the appropriate alert class (Foundation or Bootstrap) in your CSS.

MIT

• git clone this repository
• npm install
• bower install

• ember server
• Visit your app at https://localhost:4200.

• ember test
• ember test --server

• ember build

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