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Fix recognising mandatory prefix built-in imports #389

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Merged
vladislavarsenev merged 2 commits into from
Jan 6, 2026
+7 −10
Merged

Fix recognising mandatory prefix built-in imports #389

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0b1dc59
Fix recognising mandatory prefix built-in imports
TomFryersMidsummer Dec 8, 2025
7235355
Merge branch 'main' into patch-1
vladislavarsenev Jan 6, 2026
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17 changes: 7 additions & 10 deletions src/utils/is-builtin-module.ts
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Original file line number Diff line number Diff line change
@@ -1,5 +1,10 @@
import { builtinModules } from 'module';

/** Every built-in importable path, including those prefixed with `node:`. */
const BUILTIN_PATHS = new Set(
builtinModules.flatMap((m) => (m.startsWith("node:") ? [m] : [m, `node:${m}`])),
);

/**
* Check if a module name is a Node.js builtin module.
* This includes both the traditional names (e.g., 'fs') and the
Expand All @@ -8,13 +13,5 @@ import { builtinModules } from 'module';
* @param moduleName The module name to check
* @returns True if the module is a Node.js builtin module
*/
export const isBuiltinModule = (moduleName: string): boolean => {
// Handle node: prefixed modules
if (moduleName.startsWith('node:')) {
const withoutPrefix = moduleName.slice(5);
return builtinModules.includes(withoutPrefix);
}

// Handle traditional module names
return builtinModules.includes(moduleName);
};
export const isBuiltinModule = (moduleName: string): boolean =>
BUILTIN_PATHS.has(moduleName);