Free cheat sheet
WebRTC Device Cheat Sheet
Cameras, microphones, and speakers. The part of WebRTC that works perfectly on your machine and breaks everywhere else.
Device handling is where most WebRTC user experience complaints originate. The APIs look straightforward in the docs. Then you hit the real world: permissions that silently fail, devices that disappear mid-call, browsers that enumerate differently, and mobile quirks that no amount of local testing will surface.
This cheat sheet maps the common device handling patterns, the gotchas, and the cross-browser differences you'll hit in production.
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What's inside
Everything you need to handle devices without losing a weekend to browser quirks.
- Device enumeration patterns that work across Chrome, Safari, Firefox, and mobile browsers
- The permissions dance: when to ask, what happens when users deny, and how to recover
- Hot-plugging: what actually fires when a user connects or disconnects a device mid-call
- The label problem: why
enumerateDevices()returns blank labels and what to do about it - Default device selection: platform differences that will surprise you
- Audio output (speaker) selection and the browsers that still don't support it
- A quick-reference matrix of device API support across browsers and platforms
Who it's for
For developers who've been burned by getUserMedia working in development and failing in production.
Frontend developers
Implementing device selection UI in WebRTC apps. You need the patterns that work, not the ones that work on your machine.
Teams debugging device issues
Chasing problems that only appear on specific platforms. This maps the cross-browser differences so you know where to look.
Anyone shipping WebRTC to real users
If your pre-call device check works on Chrome/Windows and you haven't tested Safari on iOS, this cheat sheet is for you.
Ready?
Get the cheat sheet. Stop guessing at device quirks.
All the device handling patterns, browser differences, and permission gotchas in one reference. Pin it to your wall or your repo's wiki.
