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FEATURES.md

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About Features

Please read the Feature Flag Guide for a detailed explanation.

Feature Flags

  • ember-routing-named-substates

    Add named substates; e.g. when resolving a loading or error substate to enter, Ember will take into account the name of the immediate child route that the error/loading action originated from, e.g. 'foo' if FooRoute, and try and enter foo_error or foo_loading if it exists. This also adds the ability for a top-level application_loading or application_error state to be entered for loading/error events emitted from ApplicationRoute.

    Added in #3655.

  • composable-computed-properties

    This feature allows you to combine (compose) different computed properties together. So it gives you a really nice "functional programming" like syntax to deal with complex expressions.

    Added in #3696.

  • ember-routing-will-change-hooks Finer-grained willTransition-esque actions:

    • willLeave: fires on routes that will no longer be active after the transition
    • willChangeModel: fires on routes that will still be active but will re-resolve their models

    Both of these hooks act like willTransition in the sense that they give you an opportunity to abort the transition before it happens. Common use cases include animating things away or prompting to user to deal with unsaved changes.

    Added in #4760

  • ember-metal-is-present

    Adds Ember.isPresent as the inverse of Ember.isBlank. This convenience method can lead to more semantic and clearer code.

    Added in #5136

  • property-brace-expansion-improvement

    Property brace expansion now allows multiple sets of braces to be used, as well as not restricting their location in the string.

    Added in #4617

  • ember-routing-multi-current-when

    Allows the link-to helper's currentWhen property to accept multiple routes using a (space) delimiter, for more control over a link's active state.

    Added in #3673

  • ember-runtime-item-controller-inline-class

    This feature allows you to specify a controller class inline for the itemController property of an array controller.

    Added in #5301