Ember.js v2.9.0-beta.1 发布了，Ember是一个雄心勃勃的Web应用程序，消除了样板，并提供了一个标准的应用程序架构的JavaScript框架。本次更新如下：
#14009 [BUGFIX] Fix usage of
rolewhen used inattributeBindings.#14044 / #14062 / #14066 [BUGFIX] Update
router.jsso thatgetHandlersis invoked lazily.#14054 [BUGFIX] Ensure substates properly work with
resetNamespace.#14033 [BUGFIX] Ensure
fillInacceptance test helper only sets value to first matched element.#14058 [BUGFIX] Fix issues related to
Ember.Router.mapchanges in 2.7.0.#14068 [BUGFIX] Prevent errors when clicking a
{{link-to}}during an existing transition.
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