Class LinkComponent

public
Extends: Component
Defined in: packages/@ember/-internals/glimmer/lib/components/link-to.ts:274
Module: @ember/routing

actions public

Module: @ember/routing

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.:

banner.js
import Mixin from '@ember/mixin';

export default Mixin.create({
  actions: {
    displayBanner(msg) {
      // ...
    }
  }
});
app/routes/welcome.js
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:

app/routes/song.js
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:

route.js
import Mixin from '@ember/mixin';

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

app/router.js
Router.map(function() {
  this.route("album", function() {
    this.route("song");
  });
});
app/routes/album.js
import Route from '@ember/routing/route';

export default Route.extend({
  actions: {
    startPlaying: function() {
    }
  }
});
song.js
import Route from '@ember/routing/route';

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

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

activeClass public

Module: @ember/routing

The CSS class to apply to LinkComponent's element when its active property is true.

ariaRole public

Module: @ember/routing

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: https://www.w3.org/TR/wai-aria/#roles_categorization

attributeBindings public

Module: @ember/routing

By default this component will forward href, title, rel, tabindex, and target arguments to attributes on the component's element. When invoked with {{link-to}}, you can only customize these attributes. When invoked with <LinkTo>, you can just use HTML attributes directly.

classNameBindings public

Module: @ember/routing

By default this component will set classes on its element when any of the following arguments are truthy:

  • active
  • loading
  • disabled

When these arguments are truthy, a class with the same name will be set on the element. When falsy, the associated class will not be on the element.

classNames public

Module: @ember/routing

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.

concatenatedProperties public

Module: @ember/routing

Defines the properties that will be concatenated from the superclass (instead of overridden).

By default, when you extend an Ember class a property defined in the subclass overrides a property with the same name that is defined in the superclass. However, there are some cases where it is preferable to build up a property's value by combining the superclass' property value with the subclass' value. An example of this in use within Ember is the classNames property of Component from @ember/component.

Here is some sample code showing the difference between a concatenated property and a normal one:

import EmberObject from '@ember/object';

const Bar = EmberObject.extend({
  // Configure which properties to concatenate
  concatenatedProperties: ['concatenatedProperty'],

  someNonConcatenatedProperty: ['bar'],
  concatenatedProperty: ['bar']
});

const FooBar = Bar.extend({
  someNonConcatenatedProperty: ['foo'],
  concatenatedProperty: ['foo']
});

let fooBar = FooBar.create();
fooBar.get('someNonConcatenatedProperty'); // ['foo']
fooBar.get('concatenatedProperty'); // ['bar', 'foo']

This behavior extends to object creation as well. Continuing the above example:

let fooBar = FooBar.create({
  someNonConcatenatedProperty: ['baz'],
  concatenatedProperty: ['baz']
})
fooBar.get('someNonConcatenatedProperty'); // ['baz']
fooBar.get('concatenatedProperty'); // ['bar', 'foo', 'baz']

Adding a single property that is not an array will just add it in the array:

let fooBar = FooBar.create({
  concatenatedProperty: 'baz'
})
view.get('concatenatedProperty'); // ['bar', 'foo', 'baz']

Using the concatenatedProperties property, we can tell Ember to mix the content of the properties.

In Component the classNames, classNameBindings and attributeBindings properties are concatenated.

This feature is available for you to use throughout the Ember object model, although typical app developers are likely to use it infrequently. Since it changes expectations about behavior of properties, you should properly document its usage in each individual concatenated property (to not mislead your users to think they can override the property in a subclass).

current-when public

Module: @ember/routing

Used to determine when this LinkComponent is active.

element public

Module: @ember/routing

Returns the current DOM element for the view.

elementId public

Module: @ember/routing

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):

{{my-component elementId="a-really-cool-id"}}
<MyComponent @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:

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

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

isDestroyed public

Module: @ember/routing

Destroyed object property flag.

if this property is true the observers and bindings were already removed by the effect of calling the destroy() method.

isDestroying public

Module: @ember/routing

Destruction scheduled flag. The destroy() method has been called.

The object stays intact until the end of the run loop at which point the isDestroyed flag is set.

layout public

Module: @ember/routing

Layout can be used to wrap content in a component.

mergedProperties public

Module: @ember/routing

Defines the properties that will be merged from the superclass (instead of overridden).

By default, when you extend an Ember class a property defined in the subclass overrides a property with the same name that is defined in the superclass. However, there are some cases where it is preferable to build up a property's value by merging the superclass property value with the subclass property's value. An example of this in use within Ember is the queryParams property of routes.

Here is some sample code showing the difference between a merged property and a normal one:

import EmberObject from '@ember/object';

const Bar = EmberObject.extend({
  // Configure which properties are to be merged
  mergedProperties: ['mergedProperty'],

  someNonMergedProperty: {
    nonMerged: 'superclass value of nonMerged'
  },
  mergedProperty: {
    page: { replace: false },
    limit: { replace: true }
  }
});

const FooBar = Bar.extend({
  someNonMergedProperty: {
    completelyNonMerged: 'subclass value of nonMerged'
  },
  mergedProperty: {
    limit: { replace: false }
  }
});

let fooBar = FooBar.create();

fooBar.get('someNonMergedProperty');
// => { completelyNonMerged: 'subclass value of nonMerged' }
//
// Note the entire object, including the nonMerged property of
// the superclass object, has been replaced

fooBar.get('mergedProperty');
// => {
//   page: {replace: false},
//   limit: {replace: false}
// }
//
// Note the page remains from the superclass, and the
// `limit` property's value of `false` has been merged from
// the subclass.

This behavior is not available during object create calls. It is only available at extend time.

In Route the queryParams property is merged.

This feature is available for you to use throughout the Ember object model, although typical app developers are likely to use it infrequently. Since it changes expectations about behavior of properties, you should properly document its usage in each individual merged property (to not mislead your users to think they can override the property in a subclass).

model public

Module: @ember/routing

models public

Module: @ember/routing

positionalParams public

Module: @ember/routing

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:

component.js
import Component from '@ember/component';

let MyComponent = Component.extend();

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

export default MyComponent;

It can then be invoked like this:

{{my-component "John" 38}}

The parameters can be referred to just like named parameters:

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

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

component.js
import Component from '@ember/component';

let MyComponent = Component.extend();

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

export default MyComponent;

It can then be invoked like this:

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

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

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

query public

Module: @ember/routing

rel public

Module: @ember/routing

Sets the rel attribute of the LinkComponent's HTML element.

replace public

Module: @ember/routing

Determines whether the LinkComponent will trigger routing via the replaceWith routing strategy.

route public

Module: @ember/routing

tabindex public

Module: @ember/routing

Sets the tabindex attribute of the LinkComponent's HTML element.

tagName public

Module: @ember/routing

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.

If the tagName is '', the view will be tagless, with no outer element. Component properties that depend on the presence of an outer element, such as classNameBindings and attributeBindings, do not work with tagless components. Tagless components cannot implement methods to handle events, and have no associated jQuery object to return with $().

target public

Module: @ember/routing

Available since v1.8.0

Sets the target attribute of the LinkComponent's HTML element.

title public

Module: @ember/routing

Sets the title attribute of the LinkComponent's HTML element.

© 2020 Yehuda Katz, Tom Dale and Ember.js contributors
Licensed under the MIT License.
https://api.emberjs.com/ember/3.25/classes/LinkComponent/properties