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ERR_REQUIRE_CYCLE_MODULE

require cycle module

What does this code mean?

Code ERR_REQUIRE_CYCLE_MODULE · An issue reported by Node.js.

Official explanation · Original text

When trying to require() an ES Module, a CommonJS to ESM or ESM to CommonJS edge participates in an immediate cycle. This is not allowed because ES Modules cannot be evaluated while they are already being evaluated. To avoid the cycle, the require() call involved in a cycle should not happen at the top-level of either an ES Module (via createRequire()) or a CommonJS module, and should be done lazily in an inner function.

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