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My name is Marcin Wichary. I’ve worked as a UX designer, typographer, front-end person, and manager at Google, Medium, and Figma. I’ve also written a book about keyboards and typing, gave talks, and published essays about design, typography, and technology.

Unsung is my blog about software craft and quality.

More info about Unsung

Send me feedback, tips, bug reports, and anything else:

More info about Unsung

“First, don’t interfere with user input.”

In response to a previous post, one of the readers wrote this:

I would phrase this as the fault of the animation having violated the Hippocratic oath for animations, which is “first, do no harm” a.k.a. “first, don’t interfere with user input”.

Yes, one has to be afraid of hyperbole – was there ever an onscreen transition that saved a life? – but there is something I really liked about this phrasing. After all, most transitions and animations are decorators, and every transition and animation is, by definition, also a delay.

Here’s Shazam as I open it, and overlaid are my frantic taps as I’m trying to make it start the song recognition process:

It’s a cute cold start animation, but:

  • It’s not interruptible, like animations should be.
  • It doesn’t even buffer the taps, so – in case the animation covers for something truly uninterruptible, like loading from the cloud – I can’t simply tap and forget, but instead have to wait and tap after it’s done animating.

What’s particularly frustrating here is how Shazam is being used. On the other end of this whole flow is a song that might already be fading out – timing myself, a user, can’t control – so time wasted on the uninterruptible animation might be seconds separating failure from success.

I know it does feel like a blink of an eye when watched out of context, and it is literally just a bit over a second of a delay in the best case scenario, but I wanted to share it as a general example. I believe these seconds add up, especially in a stressful moment, on an older device, repeated many times a day, across different apps… or all of the above. (My go-to example: Imagine your keyboard keys reacting with a second of delay!)

At least, I should compliment Shazam for not making another mistake: after the recognition starts, tapping the same button doesn’t cancel it – instead, you have to tap a close box in the corner. Here, the designers realized I might actually be slamming the big button many times over, and I shouldn’t be punished for it even more.