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ERR_TLS_ALPN_CALLBACK_WITH_PROTOCOLS

tls alpn callback with protocols

What does this code mean?

Code ERR_TLS_ALPN_CALLBACK_WITH_PROTOCOLS · An issue reported by Node.js.

Official explanation · Original text

This error is thrown when creating a TLSServer if the TLS options include both ALPNProtocols and ALPNCallback. These options are mutually exclusive.

Troubleshooting and diagnostic links

First check that the document's product, version, and environment match your situation.

Source and terms of use

Errors | Node.js v26.13.1 Documentation ↗

Creator: Node.js contributors; Joyent, Inc. and other Node contributors
License: MIT License (Node.js documentation)
Checked on: 2026-11-12

Modifications: English prose extracted; whitespace normalized; Korean context and classified official links added. Python code examples not redistributed.

Source details · Original licenses and notices