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Question0 answers4,658 followingPosted 29 Aug 2026, 18:47 UTC77.4K views757 votes

Node.js 18 runtime transition and module resolution compatibility

Cloudflare Workers provides a compatibility boundary for Node.js APIs, allowing developers to target specific runtime versions. Transitioning from Node.js 16 to Node.js 18 introduces changes in how built-in modules are resolved and how the runtime handles fetch behavior. When deploying in unbundled mode, the availability of specific Node.js polyfills varies.

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Community & Careers

Question1 answer1,428 followingPosted 24 Sept 2021, 19:54 UTC146.4K views1,418 votes

owner answered

Buildpack detection failure during Node.js runtime version mismatch

Node.js Buildpack Component When deploying applications to Scalingo, the buildpack detection process relies on the runtime version specified in the application configuration. If the requested Node.js version falls outside the currently supported matrix provided by the platform, the build phase is rejected. While explicit runtime pinning or buildpack override

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runtime-version

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