Unobtrusive feedback

Ten years ago I gave a talk at An Event Apart all about interaction design. It was called Paranormal Interactivity. You can watch the video, listen to the audio or read the transcript if you like.

I think it holds up pretty well. There’s one interaction pattern in particular that I think has stood the test of time. In the talk, I introduce this pattern as something you can see in action on Huffduffer:

I was thinking about how to tell the user that something’s happened without distracting them from their task, and I thought beyond the web. I thought about places that provide feedback mechanisms on screens, and I thought of video games.

So we all know Super Mario, right? And if you think about when you’re collecting coins in Super Mario, it doesn’t stop the game and pop up an alert dialogue and say, “You have just collected ten points, OK, Cancel”, right? It just does it. It does it in the background, but it does provide you with a feedback mechanism.

The feedback you get in Super Mario is about the number of points you’ve just gained. When you collect an item that gives you more points, the number of points you’ve gained appears where the item was …and then drifts upwards as it disappears. It’s unobtrusive enough that it won’t distract you from the gameplay you’re concentrating on but it gives you the reassurance that, yes, you have just gained points.

I think this a neat little feedback mechanism that we can borrow for subtle Ajax interactions on the web. These are actions that don’t change much of the content. The user needs to be able to potentially do lots of these actions on a single page without waiting for feedback every time.

On Huffduffer, for example, you might be looking at a listing of people that you can choose to follow or unfollow. The mechanism for doing that is a button per person. You might potentially be clicking lots of those buttons in quick succession. You want to know that each action has taken effect but you don’t want to be interrupted from your following/unfollowing spree.

You get some feedback in any case: the button changes. Maybe the text updates from “follow” to “unfollow” accompanied by a change in colour (this is what you’ll see on Twitter). The Super Mario style feedback is in addition to that, rather than instead of.

I’ve made a Codepen so you can see a reduced test case of the Super Mario feedback in action.

See the Pen Unobtrusive feedback by Jeremy Keith (@adactio) on CodePen.

Here’s the code available as a gist.

It’s a function that takes two arguments: the element that the feedback originates from (pass in a DOM node reference for this), and the contents of the feedback (this can be a string of text or it can be HTML …or SVG). When you call the function with those two arguments, this is what happens:

1. The JavaScript generates a span element and puts the feedback contents inside it.
2. Then it positions that element right over the element that the feedback originates from.
3. Then there’s a CSS transform. The feedback gets a translateY applied so it drifts upward. At the same time it gets its opacity reduced from 1 to 0 so it’s fading away.
4. Finally there’s a transitionend event that fires when the animation is over. Once that event fires, the generated span is destroyed.

When I first used this pattern on Huffduffer, I’m pretty sure I was using jQuery. A few years later I rewrote it in vanilla JavaScript. That was four years ago so I wonder if the code could be improved. Have a go if you fancy it.

Still, even if the code could benefit from an update, I’m pleased that the underlying pattern still holds true. I used it recently on The Session and it’s working a treat for a new Ajax interaction there (bookmarking or unbookbarking an item).

If you end up using this unobtrusive feedback pattern anyway, please let me know—I’d love to see more examples of it in the wild.

Nuberodesign > Blog > In Praise of Buttons – Part One

I concur:

Just because a user interface uses 3D-buttons and some shading doesn’t mean that it has to look tacky. In fact, if you have to make the choice between tacky-but-usable and minimalistic-but-hard-to-use, tacky is the way to go. You don’t have to make that choice though: It’s perfectly possible to create something that is both good-looking and easy to use.

Telepresence - daverupert.com

Dave is liking the word “telepresence”:

On social media we broadcast our presence and thoughts over radio and wire and I likewise consume your projections as they echo back to me. We commune over TCP/IP.

Just wait until he discovers the related neologism coined by Ted Nelson.

Service worker meeting notes - JakeArchibald.com

Jake has written up the notes from the most recent gathering to discuss service workers. If you have any feedback on any of the proposed changes or additions to the spec, please add them. This proposal is the biggie:

We’re considering allowing the browser to run multiple concurrent instances of a service worker.

Join Fractal on Slack!

If you’re planning on giving Fractal a test drive, jump into this Slack channel. Mark and others will be able to help you out with any questions that aren’t covered in the docs.

Patterns | APG | WAI | W3C

This is a terrific resource! A pattern library of interactive components: tabs, switches, dialogs, carousels …all the usual suspects.

Each component has an example implementation along with advice and a checklist for ensuring its accessible.

It’s so great to have these all gathered together in one place!