It would be of great value to be able to have error handeling this would create a more realistic prototype and scenarios for user testing.

Example 1:
If you add a text field and set it to an email field it should trigger an error when a user doesn't fill it in correct.

Example 2:
If you add a text field and set it to a mandatory field it should trigger an error when a user skips the field or presses a submit button.

At this moment there are no application I know of that have this feature and if they do have it, it's very complex to create. In example Axure.

I also feel that the focus is too much on mobile and this puts me of using this application. This is something that Adobe XD could focus on and make it an allround application rather than just focussing on smart phone.

It can be great to be able to prototype complex animations and interactions. It can help us create more concrete prototypes with mouse and scroll animations or also infinite loop animations.

Detail of the idea in this article : https://uxplanet.org/the-killer-feature-im-waiting-for-in-our-modern-design-tools-87c3a5d3c4b3

Summary of the idea :
A 3 step process which allow you an infinity of possibilities by customizing each property with a math formula. We add syntax highlighting to help designers differentiate dynamic properties, static properties and constants or math functions.
Then, AdobeXD previewer will “just” have to recalculate and update these properties at a 60 Hz frequency to make our animations alive.
We can image some subfeatures to make this tool more powerful :
Autocompletion (like code editors) to help designers find the available properties to play with and the math functions they can use
A predefined animations library to help designers taking in hands this new feature before diving into custom formulas
The possibility to use other elements properties values as variables to create more complex animation (for exemple : use the current x position of a card to determine the opacity of its content)
Built-in easing functions we can use in our math formulas to help us create smooth interactions (yes, easing is also math)
The ability to work with more complex properties like colors, 3D rotation or 3D translation. All these properties have subcomponents, therefore we can define a formula for each subcomponent as below

Use (or have the option to use) a mouse-down (or touch-down) input to trigger changes instead of a full click (down+up).

When doing usability testing it's possible a user might try to click and drag something. Unnecessary confusion may result when the system doesn't respond at all (because a full click is necessary to trigger a change). If we could respond to the initial -press- or mouse-down we could provide an immediate response at the time the gesture begins, mitigating confusion.

Of course drag-and-drop would be super ideal, but the ability to respond to a press response would allow us to cope with this and other gesture limitations.

Hi XD team!

I'm so excited that you are releasing the iOS and Android XD apps for testing on those devices. We have apps on those platforms, but I feel like the real game changer for us would be an OTT testing app such as a native tvML (tvOS) app for Apple TV that we could at least test our Apple TV app on.

We have our app on nearly every OTT platform you can imagine such as Apple TV Legacy and tvOS, Roku, Android TV, Fire TV, XBox 360 and new ones coming soon. Our stakeholders view our design comps on HDTVs here at our office.

The TV space is super hot right now and I ask that you explore the market for how much OTT app companies could really use a prototyping and testing solution.

Seeing our prototypes at full TV screen resolution could really help us make sure colors and fonts and image contrasts are working well.

Please be the first-to-market in this space! It could be huge for XD. Thanks! :)

Prototyping for people who are visual impaired is almost impossible to do. With the voice feature added it has become a bit easier to fake but if two more featured would be added Adobe XD could prototype for even more users.

• Vibrations could be added within the action area. This would make sure that extra feedback could be added to certain buttons/area's instead of textual feedback. This would also mean that two actions should be possible; a vibration and a transition if necessary.
• The VoiceOver function of iOS can't read the Adobe XD app. It doesn't distinguish buttons/area's that have an action attached to it, which makes it impossible to test with visually impaired users who use their iPhone with the VoiceOver function. No other prototyping tool can be read, would be amazing if the Adobe XD could in the future.