Web Serial capability probe

Static page — no build step. Open it in any browser to see exactly which parts of the Web Serial API that browser exposes. Firefox 151+ (desktop) is expected to pass the static surface; everything under “Live checks” needs a real serial adapter plugged in.

Environment

Static API surface

Live checks (require a user gesture + hardware)

navigator.serial.requestPort() navigator.serial.getPorts() open @ 57600 8N1 + read 1 s

Ready.