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Readers’ Questions

Q: What is meant by the term ‘Data down, actions up’?

A: The term “Data Down, Actions Up” (DDAU) describes a common pattern found...


Q: I’d like to contribute to Ember. How can I get started?

A: There are many different ways to contribute to Ember in which you’ll be able to...


Q: What’s the difference between ember-lifeline and ember-concurrency and which one should be used?

A: Since single page applications are often long lived, scheduled asynchronous work needs...


Q: How far are we from being able to “just” write import statements from any npm package (commonJS and es6 modules)?

A: This answer was published in Issue...

C: Just install ember-auto-import addon.


Q: Why does Ember ship with RSVP instead of a Promise polyfill?

A: When you have microtasks, the problem of scheduling render for “after I finish ...


Q: How do I pitch Ember at my company?

A: The best way to pitch Ember is the same way you’d pitch...


Q: Is it bad to load data in components?

A: In general, it’s not an anti-pattern to load data in a component. But there are two common...


Q: Will breaking up Ember remove the need for Glimmer.js?

A: This answer was published in Issue #36...


Q: Are there any plans for Ember Data to embrace immutability?

A: This answer was published in Issue #34...


Q: When will we be able to use decorators in Ember apps?

A: Class fields and decorators are still experimental technologies in Javascript, but...


Q: What is the status of ember-engines?

A: This answer was published in Issue #33...


Q: Can I start using Module Unification in my app?

A: Yes, Module Unification is something that is currently available through a feature flag...


Q: Why does Ember use Broccoli and how is it different from Webpack, Rollup, Parcel?

A: Webpack, Rollup and Parcel can be seen as bundlers...


Q: What is the future of controllers? When is it a good time to use them in a modern Ember app?

A: The main job of a controller is to hand data down to other parts of the app and serve as a place to define ...


Readers’ Questions: