Most modern mobile devices include vibration hardware, which lets software code provide physical feedback to the user by causing the device to shake. The Vibration API offers Web apps the ability to access this hardware, if it exists, and does nothing if the device doesn't support it.

Vibration API - Web APIs | MDN

https://developer.mozilla.org/en-US/docs/Web/API/Vibration_API

Would a website or web app need to get permission for this, like a few websites that ask to use the gyroscope?

Yeah… Bit of a bummer, but it makes sense. Would perhaps be ideal to ask permission when a user installs the PWA.

Working on an iOS wrapper for our PWA. And man… haptic feedback makes a huge difference for the overall app experience. I wish Apple would adapt the Vibration API, but I’m not holding my breath. https://developer.mozilla.org/en-US/docs/Web/API/Vibration_API

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