SerialPort: writable property
Limited availability
This feature is not Baseline because it does not work in some of the most widely-used browsers.
Secure context: This feature is available only in secure contexts (HTTPS), in some or all supporting browsers.
Note: This feature is available in Dedicated Web Workers.
The writable read-only property of the SerialPort interface returns a WritableStream for sending data to the device connected to the port. Chunks written to this stream must be instances of ArrayBuffer, TypedArray, or DataView. This property is non-null as long as the port is open and has not encountered a fatal error.
Value
Examples
The following example shows how to write a string to a port. A TextEncoder converts the string to a Uint8Array before transmission.
const encoder = new TextEncoder();
const writer = port.writable.getWriter();
await writer.write(encoder.encode("PING"));
writer.releaseLock();
Specifications
| Specification |
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| Web Serial API # dom-serialport-writable |
Browser compatibility
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writable
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Legend
Tip: you can click/tap on a cell for more information.
- Full support
- Full support
- In development. Supported in a pre-release version.
- In development. Supported in a pre-release version.
- No support
- No support
- See implementation notes.