Class TextArea

actions public

Inherited from Ember.ActionHandler packages/ember-runtime/lib/mixins/action_handler.js:22

The collection of functions, keyed by name, available on this ActionHandler as action targets.

These functions will be invoked when a matching {{action}} is triggered from within a template and the application's current route is this route.

Actions can also be invoked from other parts of your application via ActionHandler#send.

The actions hash will inherit action handlers from the actions hash defined on extended parent classes or mixins rather than just replace the entire hash, e.g.:

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import Mixin from '@ember/mixin';

export default Mixin.create({
  actions: {
    displayBanner(msg) {
      // ...
    }
  }
});

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import Route from '@ember/routing/route';
import CanDisplayBanner from '../mixins/can-display-banner';

export default Route.extend(CanDisplayBanner, {
  actions: {
    playMusic() {
      // ...
    }
  }
});

// `WelcomeRoute`, when active, will be able to respond
// to both actions, since the actions hash is merged rather
// then replaced when extending mixins / parent classes.
this.send('displayBanner');
this.send('playMusic');

Within a Controller, Route or Component's action handler, the value of the this context is the Controller, Route or Component object:

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import Route from '@ember/routing/route';

export default Route.extend({
  actions: {
    myAction() {
      this.controllerFor("song");
      this.transitionTo("other.route");
      ...
    }
  }
});

It is also possible to call this._super(...arguments) from within an action handler if it overrides a handler defined on a parent class or mixin:

Take for example the following routes:

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import Mixin from '@ember/mixin';

export default Ember.Mixin.create({
  actions: {
    debugRouteInformation() {
      console.debug("It's a-me, console.debug!");
    }
  }
});

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import Route from '@ember/routing/route';
import DebugRoute from '../mixins/debug-route';

export default Route.extend(DebugRoute, {
  actions: {
    debugRouteInformation() {
      // also call the debugRouteInformation of mixed in DebugRoute
      this._super(...arguments);

      // show additional annoyance
      window.alert(...);
    }
  }
});

Bubbling

By default, an action will stop bubbling once a handler defined on the actions hash handles it. To continue bubbling the action, you must return true from the handler:

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Router.map(function() {
  this.route("album", function() {
    this.route("song");
  });
});

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import Route from '@ember/routing/route';

export default Route.extend({
  actions: {
    startPlaying: function() {
    }
  }
});

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import Route from '@ember/routing/route';

export default Route.extend({
  actions: {
    startPlaying() {
      // ...

      if (actionShouldAlsoBeTriggeredOnParentRoute) {
        return true;
      }
    }
  }
});

ariaRole public

Inherited from Component packages/ember-glimmer/lib/component.js:681

The WAI-ARIA role of the control represented by this view. For example, a button may have a role of type 'button', or a pane may have a role of type 'alertdialog'. This property is used by assistive software to help visually challenged users navigate rich web applications.

The full list of valid WAI-ARIA roles is available at: http://www.w3.org/TR/wai-aria/roles#roles_categorization

attributeBindings public

Inherited from Ember.ViewMixin packages/ember-views/lib/mixins/view_support.js:18

A list of properties of the view to apply as attributes. If the property is a string value, the value of that string will be applied as the value for an attribute of the property's name.

The following example creates a tag like <div priority="high" />.

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import Component from '@ember/component';

export default Component.extend({
  attributeBindings: ['priority'],
  priority: 'high'
});

If the value of the property is a Boolean, the attribute is treated as an HTML Boolean attribute. It will be present if the property is true and omitted if the property is false.

The following example creates markup like <div visible />.

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import Component from '@ember/component';

export default Component.extend({
  attributeBindings: ['visible'],
  visible: true
});

If you would prefer to use a custom value instead of the property name, you can create the same markup as the last example with a binding like this:

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import Component from '@ember/component';

export default Component.extend({
  attributeBindings: ['isVisible:visible'],
  isVisible: true
});

This list of attributes is inherited from the component's superclasses, as well.

classNameBindings public

Inherited from Ember.ClassNamesSupport packages/ember-views/lib/mixins/class_names_support.js:37

A list of properties of the view to apply as class names. If the property is a string value, the value of that string will be applied as a class name.

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// Applies the 'high' class to the view element
Ember.Component.extend({
  classNameBindings: ['priority'],
  priority: 'high'
});

If the value of the property is a Boolean, the name of that property is added as a dasherized class name.

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// Applies the 'is-urgent' class to the view element
Ember.Component.extend({
  classNameBindings: ['isUrgent'],
  isUrgent: true
});

If you would prefer to use a custom value instead of the dasherized property name, you can pass a binding like this:

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// Applies the 'urgent' class to the view element
Ember.Component.extend({
  classNameBindings: ['isUrgent:urgent'],
  isUrgent: true
});

This list of properties is inherited from the component's superclasses as well.

classNames public

Inherited from Ember.ClassNamesSupport packages/ember-views/lib/mixins/class_names_support.js:25

Standard CSS class names to apply to the view's outer element. This property automatically inherits any class names defined by the view's superclasses as well.

element public

Inherited from Ember.ViewMixin packages/ember-views/lib/mixins/view_support.js:147

Returns the current DOM element for the view.

elementId public

Inherited from Component packages/ember-glimmer/lib/component.js:887

The HTML id of the component's element in the DOM. You can provide this value yourself but it must be unique (just as in HTML):

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{{my-component elementId="a-really-cool-id"}}

If not manually set a default value will be provided by the framework. Once rendered an element's elementId is considered immutable and you should never change it. If you need to compute a dynamic value for the elementId, you should do this when the component or element is being instantiated:

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export default Component.extend({
  init() {
    this._super(...arguments);

    var index = this.get('index');
    this.set('elementId', `component-id${index}`);
  }
});

isVisible public

Inherited from Component packages/ember-glimmer/lib/component.js:916

If false, the view will appear hidden in DOM.

layout public

Inherited from Component packages/ember-glimmer/lib/component.js:858

Layout can be used to wrap content in a component.

positionalParams public

Inherited from Component packages/ember-glimmer/lib/component.js:696

Available since v1.13.0

Enables components to take a list of parameters as arguments. For example, a component that takes two parameters with the names name and age:

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import Component from '@ember/component';

let MyComponent = Component.extend();

MyComponent.reopenClass({
  positionalParams: ['name', 'age']
});

export default MyComponent;

It can then be invoked like this:

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{{my-component "John" 38}}

The parameters can be referred to just like named parameters:

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Name: {{name}}, Age: {{age}}.

Using a string instead of an array allows for an arbitrary number of parameters:

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import Component from '@ember/component';

let MyComponent = Component.extend();

MyComponent.reopenClass({
  positionalParams: 'names'
});

export default MyComponent;

It can then be invoked like this:

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{{my-component "John" "Michael" "Scott"}}

The parameters can then be referred to by enumerating over the list:

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{{#each names as |name|}}{{name}}{{/each}}

tagName public

Inherited from Ember.ViewMixin packages/ember-views/lib/mixins/view_support.js:373

Tag name for the view's outer element. The tag name is only used when an element is first created. If you change the tagName for an element, you must destroy and recreate the view element.

By default, the render buffer will use a <div> tag for views.