Limited availability
Secure context: This feature is available only in secure contexts (HTTPS), in some or all supporting browsers.
Experimental: This is an experimental technology
Check the Browser compatibility table carefully before using this in production.
Note: This feature is available in Dedicated Web Workers.
The readable read-only property of the SerialPort interface returns a ReadableStream for receiving data from the device connected to the port. Chunks read from this stream are instances of Uint8Array. This property is non-null as long as the port is open and has not encountered a fatal error.
The following example shows how to read data from a port. The outer loop handles non-fatal errors, creating a new reader until a fatal error is encountered and readable becomes null.
while (port.readable) {
const reader = port.readable.getReader();
try {
while (true) {
const { value, done } = await reader.read();
if (done) {
// |reader| has been canceled.
break;
}
// Do something with |value|â¦
}
} catch (error) {
// Handle |error|â¦
} finally {
reader.releaseLock();
}
}
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