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ERR_PROTO_ACCESS

proto access

What does this code mean?

Code ERR_PROTO_ACCESS · An issue reported by Node.js.

Official explanation · Original text

Accessing Object.prototype.__proto__ has been forbidden using --disable-proto=throw. Object.getPrototypeOf and Object.setPrototypeOf should be used to get and set the prototype of an object.

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