Question 1

mime vs mime-types which is better?

Accepted Answer

Mime is dependency-free and includes all mime-db types, making it more comprehensive and lightweight, while mime-types is another option but may have different update cycles or bundle sizes. Choose Mime for modern projects prioritizing minimal dependencies, but check mime-types if you need specific legacy compatibility.

Question 2

how to add custom MIME types in mime?

Accepted Answer

Create a new Mime instance using the Mime constructor from 'mime/lite' or the main package, then use the define() method to map custom types to extensions. Remember, the default mime object is immutable, so custom instances are necessary for mutable mappings.

Question 3

does mime library work with TypeScript?

Accepted Answer

Yes, mime has built-in TypeScript types, so you don't need to install @types/mime. This provides type safety for methods like getType() and getExtension(), improving code reliability in TypeScript projects.

Question 4

what does mime lite version exclude?

Accepted Answer

The lite version excludes unofficial MIME types such as 'prs.*', 'x-*', and 'vnd.*' prefixes, which are often vendor-specific or experimental. This reduces bundle size but may miss some less common types used in specialized applications.

Question 5

upgrading from mime@3 to mime@4 what breaks?

Accepted Answer

Key breaking changes include no support for direct imports of mime properties and the default mime object being immutable. Also, mime@4 requires ESM and ES2020 runtime, so ensure your project is updated to avoid import errors or runtime issues.

Question 6

mime getType returns null why?

Accepted Answer

getType() returns null when the extension is not detected (e.g., from a path without a clear extension) or not recognized in the MIME database. Check that the input is a valid file path or extension, and consider adding custom mappings if needed.

node-mime

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