is-bun-module

A utility library to check if a module is a Bun built-in module or a Node.js module implemented in Bun.

API

Module Checking Functions

isBunModule(moduleName, bunVersion?)

Checks if a specifier is a Bun module.

1import { isBunModule } from "is-bun-module";
2isBunModule("bun"); // true
3isBunModule("bun:test", "1.0.0"); // true
4isBunModule("notBunModule"); // false

isBunImplementedNodeModule(moduleName, bunVersion?)

Checks if a specifier is a Node module implemented in Bun.

1import { isBunImplementedNodeModule } from "is-bun-module";
2isBunImplementedNodeModule("fs"); // true
3isBunImplementedNodeModule("node:fs"); // true
4isBunImplementedNodeModule("node:notNodeModule"); // false
5isBunImplementedNodeModule("node:http2", "1.0.0"); // false, added in 1.0.13

isBunBuiltin(moduleName, bunVersion?)

Checks if a specifier is either a Bun module or a Node.js module implemented in Bun.

1import { isBunBuiltin } from "is-bun-module";
2isBunBuiltin("bun"); // true
3isBunBuiltin("fs"); // true
4isBunBuiltin("notBunModule"); // false

Module Listing Functions

getBunModules(bunVersion?)

Returns an array of all Bun modules available in the specified version.

1import { getBunModules } from "is-bun-module";
2getBunModules(); // ["bun", "bun:ffi", ...]
3getBunModules("1.0.0"); // Returns modules available in version 1.0.0

getBunImplementedNodeModules(bunVersion?)

Returns an array of all Node.js modules implemented in Bun for the specified version.

1import { getBunImplementedNodeModules } from "is-bun-module";
2getBunImplementedNodeModules(); // ["fs", "path", ...]
3getBunImplementedNodeModules("1.0.0"); // Returns implemented Node.js modules in version 1.0.0

getBunBuiltinModules(bunVersion?)

Returns an array of all builtin modules (both Bun modules and implemented Node.js modules).

1import { getBunBuiltinModules } from "is-bun-module";
2getBunBuiltinModules(); // ["bun", "bun:ffi", "fs", "path", ...]

Notes

• Only Bun v1.0.0+ is supported
• You can also pass latest as Bun version
• Inspired by is-core-module and made for eslint-import-resolver-typescript
• Runtime-independent