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fix(cjs): Use module instead of require for CJS check - #15927
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lforst
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Mar 31, 2025
lforst
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Mar 31, 2025
| /** Detect CommonJS. */ | ||
| export function isCjs(): boolean { | ||
| return typeof require !== 'undefined'; | ||
| return typeof module !== 'undefined' && typeof module.exports !== 'undefined'; |
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Why are we also checking for module.exports?
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Just some additional safety as there is maybe a variable named module. But it's more unlikely that there is one that is an object with the key exports.
mydea
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mydea
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| /** Detect CommonJS. */ | ||
| export function isCjs(): boolean { | ||
| return typeof require !== 'undefined'; | ||
| try { |
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IMHO if we do the try catch, we can omit the && module check xD as we should be safe already!
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onurtemizkan pushed a commit
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Apr 3, 2025
As `require` is supported in ESM as well from [Node 20.19.0](https://nodejs.org/en/blog/release/v20.19.0) onwards, the check does not work anymore. However, `module` is not available in ESM. Also mentioned in this comment: #14202 (comment) [Node: Compatibility with CommonJS](https://nodejs.org/docs/latest-v15.x/api/esm.html#esm_interoperability_with_commonjs) [Bun: Using require](https://bun.sh/docs/runtime/modules#using-require)
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As
requireis supported in ESM as well from Node 20.19.0 onwards, the check does not work anymore. However,moduleis not available in ESM.Also mentioned in this comment: #14202 (comment)
Node: Compatibility with CommonJS
Bun: Using require