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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.

  • ember-handlebars-caps-lookup Forces Handlebars values starting with capital letters, like {{CONSTANT}}, to always be looked up on Ember.lookup. Previously, these values would be looked up on the controller in certain cases.

    Added in #3218

  • 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.

  • query-params-new

    Add query params support to the ember router. This is a rewrite of a previous attempt at an API for query params. You can define query param properties on route-driven controllers with the queryParams property, and any changes to those properties will cause the URL to update, and in the other direction, any URL changes to the query params will cause those controller properties to update.

    Added in #4008.

  • ember-runtime-test-friendly-promises Ember.RSVP.Promise's are now ember testing aware

    • they no longer cause autorun assertions
    • if a test adapter is provided, they still automatically tell the underlying test framework to start/stop between async steps.

    Added in #4176